CVE-2026-80983: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80983DEBIAN-CVE-2026-80983
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80983 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.3% 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
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 10
OPENSUSE-SU-2026:11805-1OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1

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: fix socket refcount leak in smc_switch_conns() smc_switch_conns() takes a reference on the SMC socket before dropping lgr->conns_lock, so the connection stays alive while the CDC slot is fetched: sock_hold(&smc->sk); read_unlock_bh(&lgr->conns_lock); /* pre-fetch buffer outside of send_lock, might sleep */ rc = smc_cdc_get_free_slot(conn, to_lnk, &wr_buf, NULL, &pend); if (rc) goto err_out; The err_out label only drops the wr_tx link reference, so this early exit returns without the matching sock_put(). The second error exit is not affected, because sock_put() has already run by then. A leaked sk_refcnt means the smc_sock is never destroyed. Its send and receive buffers stay allocated, and for a user socket the reference held on the network namespace is never released, so the netns can no longer be torn down. smc_cdc_get_free_slot() fails when the target link goes down or when the connection has been killed while the switch is in progress. Both are reachable during the link failover this function implements, so the leak is triggered by the same hardware events that make smc_switch_conns() run in the first place. Restructure so there is a single sock_put() covering both outcomes, instead of adding a second one to the error path.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

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

Ubuntu157 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
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < a3378466704e0bbe93aef9769552dca7673a7eb6 | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < e20227019d9da73f8fdf16f0951c2e188c84933f | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < 09d7a9e162ee1a269878c126aee3d7eff43e4130 | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < 84dea0585f6b538ae895a8b1d025f4897737f3b1 | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < d89dc1bd8845c669a700eee58c64ebd3cc1b6d2d | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < d9a879ac25958bdaecb669ce70e58f8e2ff170de | ≥ 95f7f3e7dc6bd2e735cb5de11734ea2222b1e05a, < 719296c4aa8213d4ac8002e77d5956d436bc98d0 | 99f19566b1c4d3dc4d934ee2ef43faadebb56d70 | 0d9ddf515cde793841f738490037560fd6559c63 | ≥ 5.10.90, < 5.11 | ≥ 5.14.14, < 5.15 | 5.15

3 vendors · 160 products

References

12 links
Show all 12 references