CVE-2026-43272 (GCVE-0-2026-43272)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-10-21 12:40
VLAI
EPSS
VEX
Title
ring-buffer: Fix possible dereference of uninitialized pointer
Summary
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Fix possible dereference of uninitialized pointer
There is a pointer head_page in rb_meta_validate_events() which is not
initialized at the beginning of a function. This pointer can be dereferenced
if there is a failure during reader page validation. In this case the control
is passed to "invalid" label where the pointer is dereferenced in a loop.
To fix the issue initialize orig_head and head_page before calling
rb_validate_buffer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Severity
5.5 (Medium)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < a4afdff9c715af50cf6c3f2dc601932c2cea17a2
(git)
Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < bc77986f3cb7476637052edf2d87137fa39f153d (git) Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < d9942396845fef2369478c157b26738fe07142f6 (git) Affected: 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 , < f1547779402c4cd67755c33616b7203baa88420b (git) |
guessed | |
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.114 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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