Answer in brief
CVE-2026-74631 records a Unknown severity vulnerability in net: smc: fix splice entry lifetime imbalance in smc_rx_splice. 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 | >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <c841789e456ec6751342fa800639ce8e82ff0e6b || >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <af02c67ce654356c58db20a0bb2db33ace3b07a8 || >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <ca8342b5fc24c249fdb998468f6a168b457c67e5 || >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0 || >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <4515c78f4d9fd577270f012efeb062ea58b3682d || >=9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <5d9686af2976741bbd79b150d1c9e60b81e7f12e | c841789e456ec6751342fa800639ce8e82ff0e6b, af02c67ce654356c58db20a0bb2db33ace3b07a8, ca8342b5fc24c249fdb998468f6a168b457c67e5, 0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0, 4515c78f4d9fd577270f012efeb062ea58b3682d, 5d9686af2976741bbd79b150d1c9e60b81e7f12e |
| Linux/Linuxgeneric | 4.18 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via the pipe buffer callback. The old post-splice accounting also derives the number of queued VM pages from an offset mutated while building the descriptor, and a multi-page splice pairs one sock_hold() with multiple sock_put() calls. Take the page and socket references for every candidate entry before splice_to_pipe(), and drop the matching private state, page reference, and socket reference from smc_rx_spd_release() for entries that never get queued. This fixes a refcount imbalance that can underflow page refcounts and trigger a use-after-free.
Quoted source text, attributed separately from HOL analysis.