Answer in brief
CVE-2026-63823 records a High severity (CVSS 7.8) vulnerability in keys: Pin request_key_auth payload in instantiate paths. 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.
CVSS is 7.8. 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 | >=b5f545c880a2a47947ba2118b2509644ab7a2969 <d8274181b0f28d450b42489723a5ba81042158d7 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <4982bfabce6b33b3c9eddb4fb900fe5568b7cf91 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <708709c65a1832a99b0eef8ae46e343ddaca3d06 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <35ab4db86774d82389e4b9559e26ab7f68d8e395 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <f9b68632ac93cc742f2e411021c4dbfe452ea0c2 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <7216ce8cb12fee44e309503955bb83806b106129 || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <83c0a1cb296d955d5f4d1f0bd8a769ba8ed8c29f || >=b5f545c880a2a47947ba2118b2509644ab7a2969 <fd15b457a86939c38aa12116adabd8ff686c5e51 | d8274181b0f28d450b42489723a5ba81042158d7, 4982bfabce6b33b3c9eddb4fb900fe5568b7cf91, 708709c65a1832a99b0eef8ae46e343ddaca3d06, 35ab4db86774d82389e4b9559e26ab7f68d8e395, f9b68632ac93cc742f2e411021c4dbfe452ea0c2, 7216ce8cb12fee44e309503955bb83806b106129, 83c0a1cb296d955d5f4d1f0bd8a769ba8ed8c29f, fd15b457a86939c38aa12116adabd8ff686c5e51 |
| Linux/Linuxgeneric | 2.6.16 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.]
Quoted source text, attributed separately from HOL analysis.