CVE-2026-80984: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80984DEBIAN-CVE-2026-80984
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80984 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
OPENSUSE-SU-2026:11805-1OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1SUSE-SU-2026:24235-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

+0.01 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 21f6f41e82e59740e26e06e77bdf58dc7f6f08dd, < ab26e12dd5d2f43d939fcf456933a816e81d2e51 | ≥ ae2be35cbed2c8385e890147ea321a3fcc3ca5fa, < e3fcff8d22a6c9540748846cd800443a643553a6 | ≥ ae2be35cbed2c8385e890147ea321a3fcc3ca5fa, < f950e1b1f0aad334f9a9ee552c4dd5b794ebdd45 | ≥ ae2be35cbed2c8385e890147ea321a3fcc3ca5fa, < f517cf02033801a28f98d86ca613a3533cf066b3 | ≥ ae2be35cbed2c8385e890147ea321a3fcc3ca5fa, < b395dd319cea422239cb45b998fb38d7e373af87 | ≥ 6.6.66, < 6.6.157 | 6.10

3 vendors · 145 products

References

10 links