CVE-2026-43239 PUBLISHED

smb: client: prevent races in ->query_interfaces()

Assigner: Linux
Reserved: 01.05.2026 Published: 06.05.2026 Updated: 06.05.2026

In the Linux kernel, the following vulnerability has been resolved:

smb: client: prevent races in ->query_interfaces()

It was possible for two query interface works to be concurrently trying to update the interfaces.

Prevent this by checking and updating iface_last_update under iface_lock.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 93e8e3ee165ae4609a1222b516b573837103d2c3 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to ab6564f416a6eaf1199200b6100952407b438f7d (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 6287eefaf21ec805d42f941bd368018cf397a7f5 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 76cc4faba0343c6db945b8dc75425b33d633e1b8 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to c3c06e42e1527716c54f3ad2ced6a034b5f3a489 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • unaffected from 6.6.128 to 6.6.* (incl.)
  • unaffected from 6.12.75 to 6.12.* (incl.)
  • unaffected from 6.18.16 to 6.18.* (incl.)
  • unaffected from 6.19.6 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References