Answer in brief
CVE-2026-31400 records a Unknown severity vulnerability in sunrpc: fix cache_request leak in cache_release. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1dfedb293943e491379c9302b428e6f920a73d12 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f18c1f2a88ca91357916997cdb0f7adaf14fc497 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7bcd5e318876ac638c8ceade7a648e76ac8c48e1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41f6ba6c98a618043d2cd71030bf9a752dfab8b2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <301670dcd098c1fe5c2fe90fb3c7a8f4814d2351 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <be5c35960e5ead70862736161836e2d1bc7352dc || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <373457de14281c1fc7cace6fc4c8a267fc176673 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17ad31b3a43b72aec3a3d83605891e1397d0d065 | 1dfedb293943e491379c9302b428e6f920a73d12, f18c1f2a88ca91357916997cdb0f7adaf14fc497, 7bcd5e318876ac638c8ceade7a648e76ac8c48e1, 41f6ba6c98a618043d2cd71030bf9a752dfab8b2, 301670dcd098c1fe5c2fe90fb3c7a8f4814d2351, be5c35960e5ead70862736161836e2d1bc7352dc, 373457de14281c1fc7cace6fc4c8a267fc176673, 17ad31b3a43b72aec3a3d83605891e1397d0d065 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Apr 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix cache_request leak in cache_release When a reader's file descriptor is closed while in the middle of reading a cache_request (rp->offset != 0), cache_release() decrements the request's readers count but never checks whether it should free the request. In cache_read(), when readers drops to 0 and CACHE_PENDING is clear, the cache_request is removed from the queue and freed along with its buffer and cache_head reference. cache_release() lacks this cleanup. The only other path that frees requests with readers == 0 is cache_dequeue(), but it runs only when CACHE_PENDING transitions from set to clear. If that transition already happened while readers was still non-zero, cache_dequeue() will have skipped the request, and no subsequent call will clean it up. Add the same cleanup logic from cache_read() to cache_release(): after decrementing readers, check if it reached 0 with CACHE_PENDING clear, and if so, dequeue and free the cache_request.
Quoted source text, attributed separately from HOL analysis.