What’s Vulnerable › Vulnerabilities

CVE-2026-98057: ring-buffer: Add checking nr_subbufs to persistent ring buffer validation

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

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.

Affected products

• Linux kernel: from 6.12.16 before 6.12.111; from 6.13.4 before 6.14; 6.14 — fixed in 6.12.111, 6.14, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.12.111, 6.14, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/364a31052aa9ef91db137f82d797366007cd85b7
• https://git.kernel.org/stable/c/69d502457e3f76142f7fcf6e2625e80e0ce8a60f
• https://git.kernel.org/stable/c/6c001a62c34f13fe1c6a24304c289b387d9e697d
• https://git.kernel.org/stable/c/f0467190e6a9fc61e343c8064ef16aad513788c3

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