CVE-2026-80980
CVE CVE-2026-80980EUVD EUVD-2026-76303Published 2026-09-11T19:42:40.000ZLast changed 2026-09-13T06:28:46.000ZCVSS 9.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/smc: stop killed, freed and out_of_sync sharing a byte The three connection state flags are single-bit bitfields, so they occupy one byte of struct smc_connection and every store to one is a read-modify-write of the other two: u8 killed : 1; u8 freed : 1; u8 out_of_sync : 1; They are not written under a common lock. smc_cdc_msg_validate() sets out_of_sync from the receive tasklet, while smc_conn_kill() sets killed from process context under lock_sock(), and the receive path does not defer to the backlog when the socket is owned -- smc_cdc_msg_recv() takes only bh_lock_sock(). Give each flag its own byte so a store no longer touches its neighbours. All readers test them as booleans and are unchanged. struct smc_connection grows by two bytes.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux b286a0651e4404ab96cdfdcdad8a839a26b3751e <db51a8658c11a82432b64999519a269c3aabb447; 5.8; patch: 7.3-rc1; patch: 0; b286a0651e4404ab96cdfdcdad8a839a26b3751e <313f79149eb337411c64e2c247234b62ef9a3cb9; patch: 7.2.4; b286a0651e4404ab96cdfdcdad8a839a26b3751e <2cb7a8d64b7e8ccdc69bbe48fe9c4eaa79c33aec; patch: 6.18.50
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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