7.8

CVE-2026-31673: linux Race Condition

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-31673DEBIAN-CVE-2026-31673CGA-6xhw-jgx3-pm4p
Published 25-04-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-31673 is a high (CVSS 7.8) Race Condition vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 40 · Related 40
LSN-0122-1OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22108-1SUSE-SU-2026:22137-1SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1

Timeline

  1. 25-04-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: af_unix: read UNIX_DIAG_VFS data under unix_state_lock Exact UNIX diag lookups hold a reference to the socket, but not to u->path. Meanwhile, unix_release_sock() clears u->path under unix_state_lock() and drops the path reference after unlocking. Read the inode and device numbers for UNIX_DIAG_VFS while holding unix_state_lock(), then emit the netlink attribute after dropping the lock. This keeps the VFS data stable while the reply is being built.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

+0.06 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

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

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard6 products
  • linux-aws-6.18< 6.18.31-r0
  • linux-azure-6.18< 6.18.24-r1 | < 6.18.31-r0
  • linux-gcp-6.18< 6.18.31-r0
  • linux-qemu-6.18< 6.18.31-r0 | < 6.18.24-r3
  • linux-qemu-6.18-bootc-boot-installed< 6.18.31-r0
Linux2 products
  • linux≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < e7339db13b9ddb63417b12da55fd6191e59f7442 | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < 4f6a8f10182c3a9d22e8eb183957ae7ade9e4bf7 | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < c3ec44ab4526bbc4b6c9fc845af86488244f4c9b | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < b9232421a77a649c9376c99fdfc8cb7f79cad34c | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < 0c739f3785f84af695952c2bac8be2f45082c9b8 | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < 900a4e0910e98b8caef117d5df00471fa438dcf9 | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < bdf206e740bf2919d818f132c8c9cc7ed91d11c0 | ≥ 5f7b0569460b7d8d01ca776430a00505a68b7584, < 39897df386376912d561d4946499379effa1e7ef | 3.3
  • linux_kernel≥ 3.3, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1

4 vendors · 166 products

References

43 links
Show all 43 references