CVE-2026-98057

ring-buffer: Add checking nr_subbufs to persistent ring buffer validation

State: Published
Severity: Not scored
Published: Sep 25, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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

ring-buffer: Add checking nr_subbufs to persistent ring buffer validation

Sashiko reported that the code was using meta->nr_subbufs without making sure that it matched the nr_pages + 1 on data that was assuming the two were the same.

Add a check to the persistent ring buffer validation code to make sure that the saved nr_subbufs matches what we expect.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	3ec743d558f111d8999aea24577ba66c65ee2eeb to before f0467190e6a9fc61e343c8064ef16aad513788c3Affected f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 364a31052aa9ef91db137f82d797366007cd85b7Affected f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 69d502457e3f76142f7fcf6e2625e80e0ce8a60fAffected f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 6c001a62c34f13fe1c6a24304c289b387d9e697dAffected 0d547a6f5e8fad26ebc12f501d7d19fccdbad6bfAffected 6.12.16 to before 6.12.111Affected 6.13.4 to before 6.14Affected
LinuxLinux	6.14Affected before 6.14Not affected 6.12.111 through 6.12.Not affected 6.18.57 through 6.18.Not affected 7.2.7 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

3ec743d558f111d8999aea24577ba66c65ee2eeb to before f0467190e6a9fc61e343c8064ef16aad513788c3Affected
f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 364a31052aa9ef91db137f82d797366007cd85b7Affected
f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 69d502457e3f76142f7fcf6e2625e80e0ce8a60fAffected
f5b95f1fa2ef3a03f49eeec658ba97e721412b32 to before 6c001a62c34f13fe1c6a24304c289b387d9e697dAffected
0d547a6f5e8fad26ebc12f501d7d19fccdbad6bfAffected
6.12.16 to before 6.12.111Affected
6.13.4 to before 6.14Affected

LinuxLinux

6.14Affected
before 6.14Not affected
6.12.111 through 6.12.*Not affected
6.18.57 through 6.18.*Not affected
7.2.7 through 7.2.*Not affected
7.3 and laterNot affected

References

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