CVE-2026-93261locking/lockdep: Fix NULL pointer dereference in __lock_set_class()
- —Not scoredno CVSS score yet
- 0.20%Exploitation in 30 daysEPSS · top 91% 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: locking/lockdep: Fix NULL pointer dereference in __lock_set_class() register_lock_class() can return NULL when the lock class pool is exhausted, graph_lock() fails, or key validation fails. However, __lock_set_class() uses the return value directly in pointer arithmetic without a NULL check: class = register_lock_class(lock, subclass, 0); hlock->class_idx = class - lock_classes; If class is NULL, this computes a wild offset that corrupts hlock->class_idx. The subsequent reacquire_held_locks() call will invoke hlock_class() with this corrupted index, leading to a NULL or out-of-bounds pointer dereference. Add the missing NULL check, consistent with how __lock_acquire() already handles this case at the same call site.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 25 days later
· 25 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)
- 0.20% · top 91% 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 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < f6093ff67ea6e347574819ed23e96e0f82a25ffc
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < 59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < f56e54fd24f05e9de528fcb77f6084f80c8066ce
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < 5c3bff6cf26e6a54fbf8b893a879c32824d2d50d
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < b2113dcd8238bf00ce37a34e67b29cf31d32a545
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < e7c69c6695d84220847cca62a45e879e71e79e9d
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < 9be10f49dfc2e4b472b3a5f346483b67374774b8
- affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c – < 7577e00b9ab506202b9f1a33de3cc8cc6413a4db
- affected 2.6.27
- unaffected < 2.6.27
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc (opens in a new tab)
- https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2 (opens in a new tab)
- https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce (opens in a new tab)
- https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d (opens in a new tab)
- https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545 (opens in a new tab)
- https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d (opens in a new tab)
- https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8 (opens in a new tab)
- https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db (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-2026-86133 (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-2026-93261)Record last updated .