9.8

CVE-2023-54076: linux

CVSS: 9.8v3.1CriticalDeferred
AliasesUBUNTU-CVE-2023-54076DEBIAN-CVE-2023-54076
Published 24-12-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2023-54076 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.46%
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 13 · Related 12
RHSA-2024:2394SUSE-SU-2026:0263-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1SUSE-SU-2026:0315-1

Timeline

  1. 24-12-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missed ses refcounting Use new cifs_smb_ses_inc_refcount() helper to get an active reference of @ses and @ses->dfs_root_ses (if set). This will prevent @ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses() and thus potentially causing an use-after-free bug.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

0.00 pp

From 0.45% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.46%

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

Ubuntu85 products
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
  • linux-aws-5.19All versions (No fix recorded)
Debian1 product
  • linux< 6.4.11-1
Linux1 product
  • linux≥ 8e3554150d6c80a84b3cb046615d1a0e943811dc, < eb382196e6f6e05cfafdab797840e5a96c6e7bf0 | ≥ 8e3554150d6c80a84b3cb046615d1a0e943811dc, < bf99f6be2d20146942bce6f9e90a0ceef12cbc1e | f30d226bcc9f0e2d97b4a6e94c43a28148fbeab6 | c082c3be0f96e759ff2e361d929832fda0b93851 | ≥ 6.2.15, < 6.3 | ≥ 6.3.2, < 6.4 | 6.4

3 vendors · 87 products

References

5 links