Medium [CVE-2026-80980] Linux kernel: SMC concurrency flaw in connection state flags
This medium-severity Red Hat Linux advisory covers CVE-2026-80980.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in the Linux kernel's SMC (Server Message Block over Remote Direct Memory Access) protocol implementation. A concurrency issue exists where three connection state flags (killed, freed, and out_of_sync) share a single byte in the `smc_connection` structure without proper locking mechanisms.
This allows for a read-modify-write race condition when different functions attempt to modify these flags simultaneously. This could lead to incorrect connection state management, potentially causing unexpected behavior or a denial of service.
Red Hat severity: Moderate — CVSS 4.8 (CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-366.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 11 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 11 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 11 minutes ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.