Unspecified impact via racy SMC state flags
Published Sep 11, 2026 · Updated Sep 11, 2026
Race condition in Linux 5.8 allows context-dependent attackers to cause unspecified impact through concurrent SMC connection-state updates. The killed, freed, and out_of_sync bitfields share one byte, so each unlocked store performs a read-modify-write that can overwrite a neighboring flag changed by another context. Public sources do not establish how an attacker can force the interleaving or what concrete security consequence follows.
Summary
What happened
Race condition in Linux 5.8 allows context-dependent attackers to cause unspecified impact through concurrent SMC connection-state updates. The killed, freed, and out_of_sync bitfields share one byte, so each unlocked store performs a read-modify-write that can overwrite a neighboring flag changed by another context. Public sources do not establish how an attacker can force the interleaving or what concrete security consequence follows.
The record
- CVE
- CVE-2026-80980
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.8
- Affected versionversion=b286a0651e4404ab96cdfdcdad8a839a26b3751e <2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec
- Affected versionversion=b286a0651e4404ab96cdfdcdad8a839a26b3751e <313f79149eb337411c64e2c247234b62ef9a3cb9
- Affected versionversion=b286a0651e4404ab96cdfdcdad8a839a26b3751e <db51a8658c11a82432b64999519a269c3aabb447
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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