CVE-2026-80979
- Source
- https://cve.org/CVERecord?id=CVE-2026-80979
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80979.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80979
- Downstream
- Related
- Published
- 2026-09-11T19:42:40Z
- Modified
- 2026-09-18T18:26:42Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- net/smc: unregister the connection before draining the rx tasklet
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80979.json" }- References
-
- https://git.kernel.org/stable/c/36cdf5d48ca191dcd71c28cadbe0981b1d25318d
- https://git.kernel.org/stable/c/5bd8b764a610b6b6bc0c4d3d01652747f6e0b5c3
- https://git.kernel.org/stable/c/b4d540ac95cd35c6ebab6afb7eae2bcac7b277a5
- https://git.kernel.org/stable/c/b6b6ac713ee82b340a8e3be30b101bd2840deec4
- https://git.kernel.org/stable/c/b74d313567dfc1b7e56629ddbad04e728686f235
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80979.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-80979
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced21f6f41e82e59740e26e06e77bdf58dc7f6f08ddFixedb6b6ac713ee82b340a8e3be30b101bd2840deec4
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedae2be35cbed2c8385e890147ea321a3fcc3ca5faFixedb4d540ac95cd35c6ebab6afb7eae2bcac7b277a5Fixed5bd8b764a610b6b6bc0c4d3d01652747f6e0b5c3Fixedb74d313567dfc1b7e56629ddbad04e728686f235Fixed36cdf5d48ca191dcd71c28cadbe0981b1d25318d
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.66Fixed6.6.157
Affected versions
v6.*
Linux / Kernel
Package
- Name
- Kernel