CVE-2026-74707xsk: validate metadata when processing requests
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: xsk: validate metadata when processing requests The zero-copy path validates TX metadata while obtaining the descriptor context, then reads it again later when preparing the hardware request. User space can change the metadata between those operations and bypass the original validation. Validate the metadata in xsk_tx_metadata_request() and use the resulting flags snapshot for every feature check. Read request fields once so all zero-copy drivers process only values observed after successful validation.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 before 5fd121971912dee2f5af1efec64462ac722deb17; from ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 before 0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba; from ca4419f15abd19ba8be1e109661b60f9f5b6c9f0 before 849b1664dbda1cf6c63e0fd4f9dec23782b8c851; d9d736c416c9a85f84e15435ba82a177262e745b; from 6.14.2 before 6.15 | CNA record |
References
- https://git.kernel.org/stable/c/5fd121971912dee2f5af1efec64462ac722deb17
- https://git.kernel.org/stable/c/0cc7aa6e0d19027fdd42e6fbd156267ac1e3bbba
- https://git.kernel.org/stable/c/849b1664dbda1cf6c63e0fd4f9dec23782b8c851
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.