CVE-2026-63801
published 2026-07-19CVE-2026-63801: In the Linux kernel, the following vulnerability has been resolved: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done tipc_aead_decrypt() goes…
PriorityP349high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.51%
42.1th percentile
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to
crypto_aead_decrypt(req) without taking a reference on the netns, unlike
the encrypt path. When crypto_aead_decrypt() is offloaded asynchronously
(e.g. the SIMD aead wrapper queuing to cryptd), the cryptd worker runs
tipc_aead_decrypt_done() later. If the bearer's netns is torn down in the
meantime, cleanup_net() -> tipc_exit_net() -> tipc_crypto_stop() frees the
per-netns tipc_crypto, and the completion then reads it:
tipc_aead_decrypt_done() dereferences aead->crypto->stats and
aead->crypto->net, and tipc_crypto_rcv_complete() dereferences
aead->crypto->aead[] and the node table -- reading freed memory.
Decoded KASAN splat (v7.1-rc7, CONFIG_KASAN_INLINE + TIPC + TIPC_CRYPTO):
BUG: KASAN: slab-use-after-free in tipc_aead_decrypt_done (net/tipc/crypto.c:999)
Read of size 8 at addr ffff8881056258a8 by task kworker/u16:2/51
Workqueue: events_unbound
Call Trace:
tipc_aead_decrypt_done (net/tipc/crypto.c:999)
process_one_work (kernel/workqueue.c:3314)
worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
kthread (kernel/kthread.c:436)
ret_from_fork (arch/x86/kernel/process.c:158)
ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
Allocated by task 169:
__kasan_kmalloc (mm/kasan/common.c:398 mm/kasan/common.c:415)
tipc_crypto_start (net/tipc/crypto.c:1502)
tipc_init_net (net/tipc/core.c:72)
ops_init (net/core/net_namespace.c:137)
setup_net (net/core/net_namespace.c:446)
copy_net_ns (net/core/net_namespace.c:579)
create_new_namespaces (kernel/nsproxy.c:132)
__x64_sys_unshare (kernel/fork.c:3316)
do_syscall_64 (arch/x86/entry/syscall_64.c:63)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Freed by task 8:
kfree (mm/slub.c:6566)
tipc_exit_net (net/tipc/core.c:119)
cleanup_net (net/core/net_namespace.c:704)
process_one_work (kernel/workqueue.c:3314)
kthread
Affected
55 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 171d31245d11bf84836fad3b394cb465a4d008ec | 171d31245d11bf84836fad3b394cb465a4d008ec |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 2d1f21419ec121232c916d3a3fc9b6766473a0e7 | 2d1f21419ec121232c916d3a3fc9b6766473a0e7 |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 0a780653b2a7569a7af9be7d0b00b1251baca63a | 0a780653b2a7569a7af9be7d0b00b1251baca63a |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < eaca7dae02fab70c8d223cffe03cec1b93249ce2 | eaca7dae02fab70c8d223cffe03cec1b93249ce2 |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < dca7713fe044a2067387948557ea099056e1679e | dca7713fe044a2067387948557ea099056e1679e |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < e18769616fd5a90ec1e12aabbba544c488284292 | e18769616fd5a90ec1e12aabbba544c488284292 |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < 1eea5e1820a2f5164d706bd1277bc97ff31ce32d | 1eea5e1820a2f5164d706bd1277bc97ff31ce32d |
| linux | linux | >= fc1b6d6de2208774efd2a20bf0daddb02d18b1e0 < bda3348872a2ef0d19f2df6aa8cb5025adce2f20 | bda3348872a2ef0d19f2df6aa8cb5025adce2f20 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 5.11 < 5.15.211 | 5.15.211 |
| linux | linux_kernel | >= 5.16 < 6.1.177 | 6.1.177 |
| linux | linux_kernel | >= 5.5 < 5.10.260 | 5.10.260 |
| 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 |
| linux | linux_kernel | >= 6.7 < 6.12.95 | 6.12.95 |
| ubuntu | linux | — | — |
| ubuntu | linux-aws | — | — |
| ubuntu | linux-aws-5.15 | — | — |
| ubuntu | linux-aws-7.0 | — | — |
| ubuntu | linux-aws-fips | — | — |
| ubuntu | linux-azure | — | — |
| ubuntu | linux-azure-5.15 | — | — |
| ubuntu | linux-azure-7.0 | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_ubuntu9.1CRITICAL
vendor_redhat8.8HIGH
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translation lookaside buffer (TLB) invalidation before memory writes made
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so had been revoked, bypassing memory protections or escalating privileges.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- ARM32 architecture;
- RISC-V architecture;
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so had been revoked, bypassing memory protections or escalating privileges.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
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- ARM32 architecture;
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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;
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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;
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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
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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;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architecture;
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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;
- User-space API (UAPI);
- Kernel build system;
- ARM32 architecture;
- RISC-V architecture;
- S390 architec
Red Hat
kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
vendor_redhat·2026-07-19·CVSS 8.8
CVE-2026-63801 [HIGH] CWE-825 kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
kernel: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to
crypto_aead_decrypt(req) without taking a reference on the netns, unlike
the encrypt path. When crypto_aead_decrypt() is offloaded asynchronously
(e.g. the SIMD aead wrapper queuing to cryptd), the cryptd worker runs
tipc_aead_decrypt_done() later. If the bearer's netns is torn down in the
meantime, cleanup_net() -> tipc_exit_net() -> tipc_crypto_stop() frees the
per-netns tipc_crypto, and the completion then reads it:
tipc_aead_decrypt_done() dereferences aead->crypto->stats and
aead->crypto->net, and tipc_crypto_rcv_complete() dere
GHSA
In the Linux kernel, the following vulnerability has been resolved: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to crypto_
ghsa_unreviewed·2026-07-19
CVE-2026-63801 [HIGH] In the Linux kernel, the following vulnerability has been resolved: tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to crypto_
In the Linux kernel, the following vulnerability has been resolved:
tipc: fix slab-use-after-free Read in tipc_aead_decrypt_done
tipc_aead_decrypt() goes straight from tipc_bearer_hold(b) to
crypto_aead_decrypt(req) without taking a reference on the netns, unlike
the encrypt path. When crypto_aead_decrypt() is offloaded asynchronously
(e.g. the SIMD aead wrapper queuing to cryptd), the cryptd worker runs
tipc_aead_decrypt_done() later. If the bearer's netns is torn down in the
meantime, cleanup_net() -> tipc_exit_net() -> tipc_crypto_stop() frees the
per-netns tipc_crypto, and the completion then reads it:
tipc_aead_decrypt_done() dereferences aead->crypto->stats and
aead->crypto->net, and tipc_crypto_rcv_complete() dereferences
aead->crypto->aead[] and the node table -- reading freed me
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/0a780653b2a7569a7af9be7d0b00b1251baca63ahttps://git.kernel.org/stable/c/171d31245d11bf84836fad3b394cb465a4d008echttps://git.kernel.org/stable/c/1eea5e1820a2f5164d706bd1277bc97ff31ce32dhttps://git.kernel.org/stable/c/2d1f21419ec121232c916d3a3fc9b6766473a0e7https://git.kernel.org/stable/c/bda3348872a2ef0d19f2df6aa8cb5025adce2f20https://git.kernel.org/stable/c/dca7713fe044a2067387948557ea099056e1679ehttps://git.kernel.org/stable/c/e18769616fd5a90ec1e12aabbba544c488284292https://git.kernel.org/stable/c/eaca7dae02fab70c8d223cffe03cec1b93249ce2
2026-07-19
Published