CVE-2026-74602ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()
- —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: Initialise reader page order in rb_allocate_cpu_buffer() In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 1 day later
· 1 day 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 (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f9b94daa542a8d2532f0930f01cd9aec2d19621b – < 7c620d89bae1a926ab7d626600285d3516c9f3c4
- affected f9b94daa542a8d2532f0930f01cd9aec2d19621b – < 2e37f2bf111429fbfa4d985b12df3ba496ca70aa
- affected f9b94daa542a8d2532f0930f01cd9aec2d19621b – < 3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a
- affected f9b94daa542a8d2532f0930f01cd9aec2d19621b – < 6d014e44b68ddd43f71288d2a4dbb1a259869149
- affected 6.8
- unaffected < 6.8
- unaffected 6.12.105 – ≤ 6.12.*
- unaffected 6.18.45 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4 (opens in a new tab)
- https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa (opens in a new tab)
- https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a (opens in a new tab)
- https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149 (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-2026-64539 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74602)Record last updated .