CVE-2026-93079
CVE CVE-2026-93079EUVD EUVD-2026-82189Published 2026-09-17T16:11:00.000ZLast changed 2026-09-18T17:55:53.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: cxl/features: Reject Get Feature count larger than the output buffer cxlctl_get_feature() sizes its output buffer from the user's fwctl_rpc.out_len, but the device is told to write cxl_mbox_get_feat_in.count bytes into rpc_out->payload, which is a separate user-controlled value. Nothing bounds count against out_len, so a small out_len with a large count overflows the kvzalloc()'d buffer. A heap OOB write reachable from FWCTL_RPC. Reject requests where count exceeds the available payload room, before allocating.
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; 5908f3ed6dc209e5c824e63afda7545805f75a7e <4bf6bac375076ced2fa4b3fef8739bd985f93456; patch: 7.3-rc1; 5908f3ed6dc209e5c824e63afda7545805f75a7e <329ea475581c647a680a6937e353c1a6e2534b40; patch: 7.2.6; 5908f3ed6dc209e5c824e63afda7545805f75a7e <3f02031a0a53de0d3ef066c92d0486b2b11be40c; patch: 6.18.52; 6.15
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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