CVE-2026-99158ring-buffer: Fix false warning in ring_buffer_map_get_reader()
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix false warning in ring_buffer_map_get_reader() The mmap reader can warn when it catches up with a writer that is still committing events. rb_get_reader_page() returns NULL in this case, but ring_buffer_map_get_reader() treats that result as an error. The initial rb_per_cpu_empty() check filters out an empty buffer, but it does not guarantee that the next reader page has committed data. Writers do not take reader_lock and can advance commit_page before publishing the committed length on the new page. rb_get_reader_page() can swap to that page, catch up with the writer and return NULL. Handle NULL through the existing no-data exit without warning. Remove the caller's reader_page == commit_page check as well, since the reader-page helper already handles that case. The existing metadata update and return path remain in place.
Timeline
ID reserved
By Linux
- 33 days later
· 33 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 117c39200d9d760cbd5944bb89efb7b9c51965aa – < 32751946f9b3e502e3d6e42d98b343473112f887
- affected 117c39200d9d760cbd5944bb89efb7b9c51965aa – < 029770f5badedc0f0ff85fc45e24785cbbee4a67
- affected 117c39200d9d760cbd5944bb89efb7b9c51965aa – < 68e6ab180cfb6dfa79652f41ed7899a6d4cf5438
- affected 117c39200d9d760cbd5944bb89efb7b9c51965aa – < 89bab1dba8a0167ef0d819e0f55b6bafa038e87f
- affected 6.10
- unaffected < 6.10
- unaffected 6.12.115 – ≤ 6.12.*
- unaffected 6.18.59 – ≤ 6.18.*
- unaffected 7.2.13 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/32751946f9b3e502e3d6e42d98b343473112f887 (opens in a new tab)
- https://git.kernel.org/stable/c/029770f5badedc0f0ff85fc45e24785cbbee4a67 (opens in a new tab)
- https://git.kernel.org/stable/c/68e6ab180cfb6dfa79652f41ed7899a6d4cf5438 (opens in a new tab)
- https://git.kernel.org/stable/c/89bab1dba8a0167ef0d819e0f55b6bafa038e87f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-111910 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-99158)Record last updated .