CVE-2026-98394af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.
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: af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer. Fahad Alharbi reported that recv(0, MSG_PEEK) triggers busy-wait in unix_stream_read_generic() if recv() is blocking and the last skb in the queue is MSG_OOB skb. In such a situation, TCP returns 0 immediately regardless of blocking or non-blocking. Let's follow the behaviour.
- CVSS
- Not yet scored
- 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 19, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Linux Linux linux:linux (from the name) | 314001f0bf927015e459c9d387d62a231fe93af3 builds before 3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713; from 314001f0bf927015e459c9d387d62a231fe93af3 before d5dd55b316ca229a4cbf11729483ba5bb57233e7; from 314001f0bf927015e459c9d387d62a231fe93af3 before c81c5be3826c8467945b964d0cf7f7b3d65461db; 314001f0bf927015e459c9d387d62a231fe93af3 builds before 6e5ee08eb5858d175da6768d75d163817b6a9d4a | CNA record |
References
- https://git.kernel.org/stable/c/3d3c7a3df66b2ca3d2cd1a2a0c37eb701feba713
- https://git.kernel.org/stable/c/d5dd55b316ca229a4cbf11729483ba5bb57233e7
- https://git.kernel.org/stable/c/c81c5be3826c8467945b964d0cf7f7b3d65461db
- https://git.kernel.org/stable/c/6e5ee08eb5858d175da6768d75d163817b6a9d4a
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.