CVE-2026-74436
CVE CVE-2026-74436EUVD EUVD-2026-59583Published 2026-08-15T05:59:34.000ZLast changed 2026-08-17T05:47:11.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: rxrpc: serialize kernel accept preallocation with socket teardown rxrpc_kernel_charge_accept() reads rx->backlog without any socket/backlog synchronization and passes that raw pointer into rxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc() sets rx->backlog = NULL and frees the backlog rings, so a kernel preallocation worker can keep using a freed struct rxrpc_backlog while updating *_backlog_head/tail and array slots. Serialize the state check and backlog lookup with the socket lock, and reject kernel preallocation once teardown has disabled listening or discarded the service backlog.
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: 0; 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <0337cdba0c477f176c0459bed012109453184573; 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <1741378a7a83dfd8e53a9196730df709b903cd33; 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dc175389b18c29a5303ee83169ec653adfae3e17; patch: 7.1.5; patch: 6.6.148; patch: 6.12.101; patch: 6.18.40; 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5; patch: 7.2; 4.9; 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 <35a967ff8b24db09ee429c39c5b5e6571639997d
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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