CVE-2026-63800
published 2026-07-19CVE-2026-63800: In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch…
PriorityP347critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.53%
43.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),
the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,
pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),
which still references 'lo'. This results in a use-after-free when the
tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
Affected
61 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 06f58dbc49a23c99e5c0f246879ed16667f7bf8f < 4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98 | 4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 1f24b8302c77dcaf79c64c073877a3b9f4dd25d2 | 1f24b8302c77dcaf79c64c073877a3b9f4dd25d2 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 9c0fb5c09ae5bd68dc0038692af8127029cb0385 | 9c0fb5c09ae5bd68dc0038692af8127029cb0385 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 7e37e9b3e82ade881e1798e2f4fcc54aff7793c1 | 7e37e9b3e82ade881e1798e2f4fcc54aff7793c1 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 2883ddd7542b4437a2ab4908fe2773f690e20889 | 2883ddd7542b4437a2ab4908fe2773f690e20889 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 200e7637f4d6a1342987045eea72641524f909dc | 200e7637f4d6a1342987045eea72641524f909dc |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 9645aaf689aff57427ece3b9fa47d5b5399417f4 | 9645aaf689aff57427ece3b9fa47d5b5399417f4 |
| linux | linux | >= 2c8d5fc37fe2384a9bdb6965443ab9224d46f704 < 13e198a90ca4050f4bee8a3f23680389a6563ccc | 13e198a90ca4050f4bee8a3f23680389a6563ccc |
| linux | linux | >= 5.10.9 < 5.10.260 | 5.10.260 |
| linux | linux | >= 5.4.91 < 5.5 | 5.5 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 5.10.9 < 5.10.260 | 5.10.260 |
| linux | linux_kernel | >= 5.11.1 < 5.15.211 | 5.15.211 |
| linux | linux_kernel | >= 5.16 < 6.1.177 | 6.1.177 |
| linux | linux_kernel | >= 5.4.91 < 5.5 | 5.5 |
| linux | linux_kernel | >= 6.13 < 6.18.38 | 6.18.38 |
| linux | linux_kernel | >= 6.19 < 7.1.3 | 7.1.3 |
| linux | linux_kernel | >= 6.2 < 6.6.144 | 6.6.144 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
vendor_ubuntu9.1CRITICAL
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It was discovered that some Arm processors could complete a broadcast
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Summary: Several security issues were fixed in the Linux kernel.
It was discovered that the i.MX clock driver in the Linux kernel did not
properly handle certain memory allocation failure conditions, leading to a
null pointer dereference vulnerability. A local attacker could possibly use
this to cause a denial of service (system crash). (CVE-2022-3114)
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
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CVE-2026-53354 [CRITICAL] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
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Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- Network file syste
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CVE-2026-53354 [CRITICAL] Linux kernel (FIPS) vulnerabilities
Title: Linux kernel (FIPS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- exFAT file system;
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Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- InfiniBand drivers;
- Network drivers;
- TCM subsystem;
- exFAT file system;
- Network file syste
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Linux kernel (Oracle) vulnerabilities
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CVE-2026-64191 [CRITICAL] Linux kernel (Oracle) vulnerabilities
Title: Linux kernel (Oracle) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
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level, resulting in privilege escalation. (CVE-2025-54518)
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CVE-2026-63912 [CRITICAL] Linux kernel (IBM) vulnerabilities
Title: Linux kernel (IBM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- InfiniBand drivers;
- Network drivers;
- TCM subsystem;
- exFAT file system;
- Network file system (NFS) c
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- InfiniBand drivers;
- Network drivers;
- TCM subsystem;
- exFAT file system;
- Network file system (NFS) client;
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vendor_ubuntu·2026-09-22·CVSS 9.1
CVE-2026-63869 [CRITICAL] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
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vendor_ubuntu·2026-09-22·CVSS 9.1
CVE-2026-52938 [CRITICAL] Linux kernel (Azure) vulnerabilities
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Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were di
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CVE-2026-64504 Linux kernel (NVIDIA BaseOS) vulnerabilities
Title: Linux kernel (NVIDIA BaseOS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- User-space API (UAPI);
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- ARM32 architecture;
- ARM64 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
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- Intel NPU Driver;
- ACPI drivers;
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Ubuntu
Linux kernel (IBM) vulnerabilities
vendor_ubuntu·2026-09-21·CVSS 9.1
CVE-2026-63869 [CRITICAL] Linux kernel (IBM) vulnerabilities
Title: Linux kernel (IBM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architec
Ubuntu
Linux kernel (NVIDIA Tegra) vulnerabilities
vendor_ubuntu·2026-09-18·CVSS 9.1
CVE-2026-53358 [CRITICAL] Linux kernel (NVIDIA Tegra) vulnerabilities
Title: Linux kernel (NVIDIA Tegra) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- PowerPC architecture;
- RIS
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities
vendor_ubuntu·2026-09-18·CVSS 9.1
CVE-2026-64504 [CRITICAL] Linux kernel (Raspberry Pi) vulnerabilities
Title: Linux kernel (Raspberry Pi) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390
Ubuntu
Linux kernel (NVIDIA) vulnerabilities
vendor_ubuntu·2026-09-15
CVE-2026-63869 Linux kernel (NVIDIA) vulnerabilities
Title: Linux kernel (NVIDIA) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- ARM64 architecture;
- RISC-V architecture;
- S390 architecture;
- x86 architecture;
- Block layer subsystem;
- Cryptographic API;
- Compute Acceleration Framework;
- Intel NPU Driver;
- ACPI drivers;
- Android drivers;
- Drivers core;
- Compressed RAM block device driver;
- Bluetooth drivers;
- Character device driver;
- Hardware random number generator core;
- CPU frequency scaling framework;
- Hardware crypto device drivers;
- Buf
Ubuntu
Linux kernel (GCP) vulnerabilities
vendor_ubuntu·2026-09-07·CVSS 9.1
CVE-2026-52938 [CRITICAL] Linux kernel (GCP) vulnerabilities
Title: Linux kernel (GCP) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
It was discovered that some AMD Zen 2 processors did not properly isolate
shared resources in the operation cache. A local attacker could possibly
use this issue to corrupt instructions executed at a higher privilege
level, resulting in privilege escalation. (CVE-2025-54518)
Several security issues were disc
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-09-07·CVSS 9.1
CVE-2026-64504 [CRITICAL] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
Ubuntu
Linux kernel (OEM) vulnerabilities
vendor_ubuntu·2026-09-07·CVSS 9.1
CVE-2026-63869 [CRITICAL] Linux kernel (OEM) vulnerabilities
Title: Linux kernel (OEM) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architec
Red Hat
kernel: pNFS: Fix use-after-free in pnfs_update_layout()
vendor_redhat·2026-07-19·CVSS 9.8
CVE-2026-63800 [CRITICAL] CWE-825 kernel: pNFS: Fix use-after-free in pnfs_update_layout()
kernel: pNFS: Fix use-after-free in pnfs_update_layout()
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),
the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,
pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),
which still references 'lo'. This results in a use-after-free when the
tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
A flaw was found in the Linux kernel's parallel Network File System (pNFS) component. An issue in the `pnfs_update_layout()` function causes a use-after-free vulnerability due to incorrect ordering of memory management operations. This flaw can
GHSA
In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls
ghsa_unreviewed·2026-07-19
CVE-2026-63800 [CRITICAL] In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls
In the Linux kernel, the following vulnerability has been resolved:
pNFS: Fix use-after-free in pnfs_update_layout()
When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(),
the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds,
pnfs_put_layout_hdr(lo) is called before trace_pnfs_update_layout(),
which still references 'lo'. This results in a use-after-free when the
tracepoint accesses lo's fields.
Fix this by moving the tracepoint call before pnfs_put_layout_hdr(lo).
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/13e198a90ca4050f4bee8a3f23680389a6563ccchttps://git.kernel.org/stable/c/1f24b8302c77dcaf79c64c073877a3b9f4dd25d2https://git.kernel.org/stable/c/200e7637f4d6a1342987045eea72641524f909dchttps://git.kernel.org/stable/c/2883ddd7542b4437a2ab4908fe2773f690e20889https://git.kernel.org/stable/c/4ad8b9a85dbf57ca532ee9e65ad7e6498bfbbf98https://git.kernel.org/stable/c/7e37e9b3e82ade881e1798e2f4fcc54aff7793c1https://git.kernel.org/stable/c/9645aaf689aff57427ece3b9fa47d5b5399417f4https://git.kernel.org/stable/c/9c0fb5c09ae5bd68dc0038692af8127029cb0385
2026-07-19
Published