CVE-2026-63823
CVE CVE-2026-63823EUVD EUVD-2026-45489Published 2026-07-19T12:02:19.000ZLast changed 2026-08-05T12:36:06.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: keys: Pin request_key_auth payload in instantiate paths A: request_key() B: KEYCTL_INSTANTIATE_IOV ================ ========================= create auth key store rka in auth key wait for helper get auth key load rka from auth key copy user payload sleep on #PF helper completed detach and free rka destroy auth key wake up use rka->target_key **USE-AFTER-FREE** Give request_key_auth payloads a refcount. Take a payload reference while authkey->sem stabilizes the payload and revocation state. Hold that reference across the instantiate and reject paths. Drop the auth key owning reference from revoke and destroy. [jarkko: Replaced the first two paragraphs of text with an actual concurrency scenario.]
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 b5f545c880a2a47947ba2118b2509644ab7a2969 <4982bfabce6b33b3c9eddb4fb900fe5568b7cf91; b5f545c880a2a47947ba2118b2509644ab7a2969 <f9b68632ac93cc742f2e411021c4dbfe452ea0c2; patch: 6.1.177; patch: 6.12.95; patch: 6.6.144; patch: 7.2-rc1; patch: 6.18.38; patch: 5.15.211; patch: 7.1.3; patch: 5.10.260; 2.6.16; b5f545c880a2a47947ba2118b2509644ab7a2969 <83c0a1cb296d955d5f4d1f0bd8a769ba8ed8c29f; b5f545c880a2a47947ba2118b2509644ab7a2969 <7216ce8cb12fee44e309503955bb83806b106129; patch: 0; b5f545c880a2a47947ba2118b2509644ab7a2969 <d8274181b0f28d450b42489723a5ba81042158d7; b5f545c880a2a47947ba2118b2509644ab7a2969 <708709c65a1832a99b0eef8ae46e343ddaca3d06; b5f545c880a2a47947ba2118b2509644ab7a2969 <35ab4db86774d82389e4b9559e26ab7f68d8e395; b5f545c880a2a47947ba2118b2509644ab7a2969 <fd15b457a86939c38aa12116adabd8ff686c5e51
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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