CVE-2026-74631
CVE CVE-2026-74631EUVD EUVD-2026-64568Published 2026-08-22T15:32:12.000ZLast changed 2026-08-25T05:40:55.000ZCVSS 8.4
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.12.104; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <af02c67ce654356c58db20a0bb2db33ace3b07a8; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <c841789e456ec6751342fa800639ce8e82ff0e6b; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <07ad246529d136d5ef441d5ab4c305d132ff3090; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <ca8342b5fc24c249fdb998468f6a168b457c67e5; patch: 5.15.217; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <5d9686af2976741bbd79b150d1c9e60b81e7f12e; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <0b7d54cedea5cb158e21925ae0c6c2f5c87ed2a0; patch: 5.10.266; patch: 7.1.9; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <4515c78f4d9fd577270f012efeb062ea58b3682d; patch: 7.2; patch: 0; 4.18; patch: 6.1.183; 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f <7ddc7af2ae7fc5a0c0635b245c0824c8b76de5cb; patch: 6.18.45; patch: 6.6.152
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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