CVE-2026-43379
published 2026-05-08CVE-2026-43379: In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close() opinfo pointer obtained…
PriorityP346critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.44%
37.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is being
accessed after rcu_read_unlock() has been called. This creates a
race condition where the memory could be freed by a concurrent
writer between the unlock and the subsequent pointer dereferences
(opinfo->is_lease, etc.), leading to a use-after-free.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 27b40b7bfcd121fe13a150ffe11957630cf49246 < bf4d66d72e4a9e268c1012c331ce9eaedb5e2086 | bf4d66d72e4a9e268c1012c331ce9eaedb5e2086 |
| linux | linux | >= 5fb282ba4fef8985a5acf2b32681f2ec07732561 < 960699317d39f46611f4ebeb69edc567c1f4e6b6 | 960699317d39f46611f4ebeb69edc567c1f4e6b6 |
| linux | linux | >= 5fb282ba4fef8985a5acf2b32681f2ec07732561 < dbbd328cf58261ca239756fe1c0d10c9518d3399 | dbbd328cf58261ca239756fe1c0d10c9518d3399 |
| linux | linux | >= 5fb282ba4fef8985a5acf2b32681f2ec07732561 < b3568347c51c46e2cabc356bc34676df98296619 | b3568347c51c46e2cabc356bc34676df98296619 |
| linux | linux | >= 5fb282ba4fef8985a5acf2b32681f2ec07732561 < eac3361e3d5dd8067b3258c69615888eb45e9f25 | eac3361e3d5dd8067b3258c69615888eb45e9f25 |
| linux | linux | >= 6.6.32 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 6.13 < 6.18.19 | 6.18.19 |
| linux | linux_kernel | >= 6.19 < 6.19.9 | 6.19.9 |
| linux | linux_kernel | >= 6.6.32 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.9 < 6.12.78 | 6.12.78 |
| ubuntu | linux-azure-6.17 | — | — |
| ubuntu | linux-gcp-6.17 | — | — |
| ubuntu | linux-hwe-6.17 | — | — |
| ubuntu | linux-nvidia-6.17 | — | — |
| ubuntu | linux-oem-6.17 | — | — |
| ubuntu | linux-oracle-6.17 | — | — |
| ubuntu | linux-realtime-6.17 | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu9.8CRITICAL
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Ubuntu
Linux kernel (NVIDIA) vulnerabilities
vendor_ubuntu·2026-08-21
CVE-2026-23014 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:
- Foo-over-UDP (FOU);
- ARM64 architecture;
- x86 architecture;
- Block layer subsystem;
- Drivers core;
- Null block device driver;
- Bluetooth drivers;
- Counter interface drivers;
- DMA engine subsystem;
- DPLL subsystem;
- GPIO subsystem;
- GPU drivers;
- I2C subsystem;
- IIO ADC drivers;
- IIO subsystem;
- InfiniBand drivers;
- On-Chip Interconnect management framework;
- IOMMU subsystem;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- Multiple devices driver;
- Media drivers;
- UACCE
Ubuntu
Linux kernel (Oracle) vulnerabilities
vendor_ubuntu·2026-08-18·CVSS 9.8
CVE-2026-52924 [CRITICAL] Linux kernel (Oracle) vulnerabilities
Title: Linux kernel (Oracle) 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:
- x86 architecture;
- InfiniBand drivers;
- Media drivers;
- Network drivers;
- Mellanox network drivers;
- Texas Instruments network drivers;
- NVME drivers;
- File systems infrastructure;
- SMB network file system;
- IPv4 networking;
- Network traffic control;
- TCP network protocol;
- Locking primitives;
- Memory management;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- RxRPC session sockets;
- SCTP protocol;
- SMC sockets;
(CVE-2026-31405, CVE-2026-31414, CVE-2026-31501, CVE-2026-31589,
CVE-202
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-08-12·CVSS 9.8
CVE-2026-31589 [CRITICAL] Linux kernel vulnerabilities
Title: Linux kernel 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:
- x86 architecture;
- InfiniBand drivers;
- Media drivers;
- Network drivers;
- Mellanox network drivers;
- Texas Instruments network drivers;
- NVME drivers;
- File systems infrastructure;
- SMB network file system;
- IPv4 networking;
- Network traffic control;
- TCP network protocol;
- Locking primitives;
- Memory management;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- RxRPC session sockets;
- SCTP protocol;
- SMC sockets;
(CVE-2026-31405, CVE-2026-31414, CVE-2026-31501, CVE-2026-31589,
CVE-2026-31633,
Red Hat
kernel: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
vendor_redhat·2026-05-08
CVE-2026-43379 CWE-825 kernel: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
kernel: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
A flaw was found in ksmbd, a component of the Linux kernel. A race condition exists where a pointer to `opinfo` is accessed after its associated memory may have been freed by a concurrent operation. This use-after-free vulnerability can lead to memory corruption, potentially causing system instability or a denial of service (DoS).
Package: kernel (Red Hat Enterprise Linux 10) - Not affected
Package: kernel (Red Hat Enterprise Linux 6) - Not affected
Package: kernel (Red Hat Enterprise Linux 7) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 7) - Not affected
Package: kernel (Red Hat Enterprise Linux 8) - Not affected
Package: kernel-rt (Red Hat Enterprise Linux 8) - Not affected
Package: kernel (Re
GHSA
GHSA-wvq8-6v44-2qvw: In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
opinfo pointer
ghsa_unreviewed·2026-05-08
CVE-2026-43379 GHSA-wvq8-6v44-2qvw: In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
opinfo pointer
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is being
accessed after rcu_read_unlock() has been called. This creates a
race condition where the memory could be freed by a concurrent
writer between the unlock and the subsequent pointer dereferences
(opinfo->is_lease, etc.), leading to a use-after-free.
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25
2026-05-08
Published