CVE-2026-23364 PUBLISHED

ksmbd: Compare MACs in constant time

Assigner: Linux
Reserved: 13.01.2026 Published: 25.03.2026 Updated: 25.03.2026

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().

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to cd52a0e309659537048a864211abc3ea4c5caa63 (excl.)
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to 307afccb751f542246bd5dc68a2c1ffe1a78418c (excl.)
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to 2cdc56ed67615ba0921383a688f24415ebe065f3 (excl.)
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to 93c0a22fec914ec4b697e464895a0f594e29fb28 (excl.)
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to f4588b85efd6007d46b80aa1b9fb746628ffb3dc (excl.)
  • affected from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to c5794709bc9105935dbedef8b9cf9c06f2b559fa (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.15 is affected
  • unaffected from 0 to 5.15 (excl.)
  • unaffected from 6.1.167 to 6.1.* (incl.)
  • unaffected from 6.6.130 to 6.6.* (incl.)
  • unaffected from 6.12.78 to 6.12.* (incl.)
  • unaffected from 6.18.19 to 6.18.* (incl.)
  • unaffected from 6.19.7 to 6.19.* (incl.)
  • unaffected from 7.0-rc2 to * (incl.)

References