CVE-2026-80984
- Source
- https://cve.org/CVERecord?id=CVE-2026-80984
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80984.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-80984
- Downstream
- Related
- Published
- 2026-09-11T19:42:43Z
- Modified
- 2026-09-18T18:26:44Z
- Summary
- net/smc: do not dereference an unset send buffer on the SMC-D teardown path
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net/smc: do not dereference an unset send buffer on the SMC-D teardown path
smc_close_stream_wait() calls smc_tx_prepared_sends() from inside its sk_wait_event() condition, and sk_wait_event() evaluates that condition once with the socket lock released. smcd_buf_detach() clears conn->sndbuf_desc from smc_conn_kill() under lock_sock(), so a link group terminating while a socket waits there leaves the helper dereferencing NULL, faulting out of close(). SIOCOUTQ reads the field by hand, and smc_close_cancel_work() drops the lock across two cancel_*_sync() calls.
Sample the pointer once in the helper, report nothing prepared while it is unset, and bound the ioctl the same way. The receive tasklet dereferences the field directly in smc_cdc_msg_recv_action(), not through this helper; 1/2 is what keeps it from running that late.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80984.json" }- References
-
- https://git.kernel.org/stable/c/ab26e12dd5d2f43d939fcf456933a816e81d2e51
- https://git.kernel.org/stable/c/b395dd319cea422239cb45b998fb38d7e373af87
- https://git.kernel.org/stable/c/e3fcff8d22a6c9540748846cd800443a643553a6
- https://git.kernel.org/stable/c/f517cf02033801a28f98d86ca613a3533cf066b3
- https://git.kernel.org/stable/c/f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80984.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-80984
- 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
-
Introduced21f6f41e82e59740e26e06e77bdf58dc7f6f08ddFixedab26e12dd5d2f43d939fcf456933a816e81d2e51
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedae2be35cbed2c8385e890147ea321a3fcc3ca5faFixede3fcff8d22a6c9540748846cd800443a643553a6Fixedf950e1b1f0aad334f9a9ee552c4dd5b794ebdd45Fixedf517cf02033801a28f98d86ca613a3533cf066b3Fixedb395dd319cea422239cb45b998fb38d7e373af87
- 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