Answer in brief
CVE-2026-80979 records a Unknown severity vulnerability in net/smc: unregister the connection before draining the rx tasklet. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <b4d540ac95cd35c6ebab6afb7eae2bcac7b277a5 || >=ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <5bd8b764a610b6b6bc0c4d3d01652747f6e0b5c3 || >=ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <b74d313567dfc1b7e56629ddbad04e728686f235 || >=ae2be35cbed2c8385e890147ea321a3fcc3ca5fa <36cdf5d48ca191dcd71c28cadbe0981b1d25318d || 21f6f41e82e59740e26e06e77bdf58dc7f6f08dd || >=6.6.66 <6.7 | b4d540ac95cd35c6ebab6afb7eae2bcac7b277a5, 5bd8b764a610b6b6bc0c4d3d01652747f6e0b5c3, b74d313567dfc1b7e56629ddbad04e728686f235, 36cdf5d48ca191dcd71c28cadbe0981b1d25318d, 6.7 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.