CVE-2026-80979
CVE CVE-2026-80979EUVD EUVD-2026-76302Published 2026-09-11T19:42:40.000ZLast changed 2026-09-14T11:59:24.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/smc: unregister the connection before draining the rx tasklet smc_conn_free() calls smc_ism_unset_conn() only while the link group is still on its device list, and never sets conn->killed. smc_lgr_terminate_sched() unlinks the group immediately and defers killing its connections to a work item, so a connection freed in that window keeps its smcd->conn[] slot with both gates in smcd_handle_irq() open, and the device can re-arm the receive tasklet after tasklet_kill() has returned. On the DMB-nocopy path the ghost send buffer is freed right after that drain, so the re-armed tasklet dereferences it. Unregister unconditionally and drain before the detach at both teardown sites, mirroring rmb_desc, which smc_buf_unuse() releases after the drain. Clear conn->sndbuf_desc before freeing it as well, so a reader that samples the pointer cannot get one that is already freed.
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 6.10; ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <36cdf5d48ca191dcd71c28cadbe0981b1d25318d; patch: 6.6.157; 6.6.66 <6.6.157; ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <5bd8b764a610b6b6bc0c4d3d01652747f6e0b5c3; patch: 6.12.109; 21f6f41e82e59740e26e06e77bdf58dc7f6f08dd <b6b6ac713ee82b340a8e3be30b101bd2840deec4; patch: 7.2.4; patch: 7.3-rc1; ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <b74d313567dfc1b7e56629ddbad04e728686f235; patch: 6.18.50; patch: 0; ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <b4d540ac95cd35c6ebab6afb7eae2bcac7b277a5
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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