🛡️ CVE-2024-50203 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

bpf, arm64: Fix address emission with tag-based KASAN enabled

In the Linux kernel, the following vulnerability has been resolved:

bpf, arm64: Fix address emission with tag-based KASAN enabled

When BPF_TRAMP_F_CALL_ORIG is enabled, the address of a bpf_tramp_image

struct on the stack is passed during the size calculation pass and

an address on the heap is passed during code generation. This may

cause a heap buffer overflow if the heap address is tagged because

emit_a64_mov_i64() will emit longer code than it did during the size

calculation pass. The same problem could occur without tag-based

KASAN if one of the 16-bit words of the stack address happened to

be all-ones during the size calculation pass. Fix the problem by

assuming the worst case (4 instructions) when calculating the size

of the bpf_tramp_image address emission.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2024-50203 is recorded against 2 packages.

  • kernel (from 6.11.0 up to 6.11.6)
  • linux-kernel

Timeline and source

Published on 8 November 2024 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-50203 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-11-08
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.11.0 6.11.6
linux-kernel — —

Similar Threats

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