CVE-2026-93079
- Source
- https://cve.org/CVERecord?id=CVE-2026-93079
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93079.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-93079
- Downstream
- Published
- 2026-09-17T16:11:00Z
- Modified
- 2026-09-20T11:30:18Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- cxl/features: Reject Get Feature count larger than the output buffer
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93079.json" }- References
-
- https://git.kernel.org/stable/c/329ea475581c647a680a6937e353c1a6e2534b40
- https://git.kernel.org/stable/c/3f02031a0a53de0d3ef066c92d0486b2b11be40c
- https://git.kernel.org/stable/c/4bf6bac375076ced2fa4b3fef8739bd985f93456
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93079.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-93079
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git