Answer in brief
CVE-2026-93261 records a Unknown severity vulnerability in locking/lockdep: Fix NULL pointer dereference in __lock_set_class(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <f6093ff67ea6e347574819ed23e96e0f82a25ffc || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2 || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <f56e54fd24f05e9de528fcb77f6084f80c8066ce || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <5c3bff6cf26e6a54fbf8b893a879c32824d2d50d || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <b2113dcd8238bf00ce37a34e67b29cf31d32a545 || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <e7c69c6695d84220847cca62a45e879e71e79e9d || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <9be10f49dfc2e4b472b3a5f346483b67374774b8 || >=64aa348edc617dea17bbd01ddee4e47886d5ec8c <7577e00b9ab506202b9f1a33de3cc8cc6413a4db | f6093ff67ea6e347574819ed23e96e0f82a25ffc, 59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2, f56e54fd24f05e9de528fcb77f6084f80c8066ce, 5c3bff6cf26e6a54fbf8b893a879c32824d2d50d, b2113dcd8238bf00ce37a34e67b29cf31d32a545, e7c69c6695d84220847cca62a45e879e71e79e9d, 9be10f49dfc2e4b472b3a5f346483b67374774b8, 7577e00b9ab506202b9f1a33de3cc8cc6413a4db |
| Linux/Linuxgeneric | 2.6.27 | Not reported |
Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.