In the Linux kernel, the following vulnerability has been resolved: af_unix: Return immediately when manage_oob() returns NULL for 0-length buffer.

Code

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Timeline

Detection, updates, and resolution for this record.

1. Oct 14, 2026 · Tenable CVE Database

   Detected

   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. Le

Sources

• CVE.orgVulnerability recordCVE-2026-98394

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-98394

  30-day exploitation probability 0.2%

  first.org
• Tenable CVE DatabaseVulnerability recordCVE-2026-98394

  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. Le

  tenable.com