| Name | CVE-2026-80984 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4817-1, DSA-6528-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | bookworm | 6.1.176-1 | fixed |
| bookworm (security) | 6.1.190-1 | fixed | |
| trixie | 6.12.107-1 | vulnerable | |
| trixie (security) | 6.12.113-1 | fixed | |
| forky | 7.2.11-1 | fixed | |
| sid | 7.2.12-1 | fixed | |
| linux-6.12 (PTS) | bookworm (security) | 6.12.113-1~deb12u1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | bookworm | (not affected) | |||
| linux | source | trixie | 6.12.111-1 | DSA-6528-1 | ||
| linux | source | (unstable) | 7.2.6-1 | |||
| linux-6.12 | source | bookworm | 6.12.111-1~deb12u1 | DLA-4817-1 |
[bookworm] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/b395dd319cea422239cb45b998fb38d7e373af87 (7.3-rc1)