CVE-2026-43358btrfs: add missing RCU unlock in error path in try_release_subpage_extent_buffer()
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% 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: btrfs: add missing RCU unlock in error path in try_release_subpage_extent_buffer() Call rcu_read_lock() before exiting the loop in try_release_subpage_extent_buffer() because there is a rcu_read_unlock() call past the loop. This has been detected by the Clang thread-safety analyzer.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 15 days later
· 15 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected ad580dfa388fabb52af033e3f8cc5d04be985e54 – < 5e1ab71f74a1e61f1254dff128a764fdebaec0b8
- affected ad580dfa388fabb52af033e3f8cc5d04be985e54 – < 35b0c8768e848e1b7e32052db36b5fa59b6a33a1
- affected ad580dfa388fabb52af033e3f8cc5d04be985e54 – < b2840e33127ce0eea880504b7f133e780f567a9b
- affected 10ec363cfefeeb77fda4c1ac20a531f21de45264
- affected 6.16.4 – < 6.17
- affected 6.17
- unaffected < 6.17
- unaffected 6.18.19 – ≤ 6.18.*
- unaffected 6.19.9 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
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-2026-28664 (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-2026-43358)Record last updated .