7.4

CVE-2026-23364: linux

CVSS: 7.4v3.1HighModified
AliasesUBUNTU-CVE-2026-23364DEBIAN-CVE-2026-23364
Published 25-03-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-23364 is a high (CVSS 7.4) vulnerability in linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.40%
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 22 · Related 20
MGASA-2026-0097MGASA-2026-0098USN-8567-1USN-8574-1USN-8574-2USN-8574-3

Timeline

  1. 25-03-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Compare MACs in constant time To prevent timing attacks, MAC comparisons need to be constant-time. Replace the memcmp() with the correct function, crypto_memneq().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.01 pp

From 0.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

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

Ubuntu145 products
  • linux< 5.15.0-198.208 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1117.124 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 8a665d733940592e671ec6afadcd0be80a091a80 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < cd52a0e309659537048a864211abc3ea4c5caa63 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 307afccb751f542246bd5dc68a2c1ffe1a78418c | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 2cdc56ed67615ba0921383a688f24415ebe065f3 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < 93c0a22fec914ec4b697e464895a0f594e29fb28 | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < f4588b85efd6007d46b80aa1b9fb746628ffb3dc | ≥ e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9, < c5794709bc9105935dbedef8b9cf9c06f2b559fa | 5.15
  • linux_kernel≥ 5.15.1, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.78 | ≥ 6.13, < 6.18.19 | ≥ 6.19, < 6.19.7 | 5.15 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.8-1

3 vendors · 148 products

References

32 links
Show all 32 references