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CVE-2026-23364

ksmbd: Compare MACs in constant time

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.15.210, 6.1.167, 6.6.130, 6.12.78, 6.18.19, and 1 more
None on Exploit-DB, Metasploit or GitHub

Summary

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().

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in 8a665d733940592e671ec6afadcd0be80a091a80; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in cd52a0e309659537048a864211abc3ea4c5caa63; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in 307afccb751f542246bd5dc68a2c1ffe1a78418c; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in 2cdc56ed67615ba0921383a688f24415ebe065f3; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in 93c0a22fec914ec4b697e464895a0f594e29fb28; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in f4588b85efd6007d46b80aa1b9fb746628ffb3dc; From e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 · fixed in c5794709bc9105935dbedef8b9cf9c06f2b559fa

  • Linux Linux

    5.15

  • KernelLinux

    From 5.15.0 · fixed in 5.15.210; From 5.16.0 · fixed in 6.1.167; From 6.2.0 · fixed in 6.6.130; From 6.7.0 · fixed in 6.12.78; From 6.13.0 · fixed in 6.18.19; From 6.19.0 · fixed in 6.19.7

References 7

git.kernel.org