CVE-2026-98791 PUBLISHED

net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference

Assigner: Linux
Reserved: 25.09.2026 Published: 18.10.2026 Updated: 18.10.2026

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

net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference

During XSK TX queue teardown, outstanding descriptors are completed without a CQE. If one requested a TX timestamp, the completion path passes that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences it.

Return zero when no CQE is available, indicating that teardown did not produce a TX timestamp.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from ec706a860eba99bf934d59f74b5db90af44e882e to fce70b6bf9f3261e887419a4e7caa25b80fa9d55 (excl.)
  • affected from ec706a860eba99bf934d59f74b5db90af44e882e to f81d40e2eb69552334f510114f3e6edd0d43178b (excl.)
  • affected from ec706a860eba99bf934d59f74b5db90af44e882e to 63df0ef4c6e3105589e6bb2e758ce611b0ada86c (excl.)
  • affected from ec706a860eba99bf934d59f74b5db90af44e882e to 7b97273cbebe9dd4fddc457f0c4f2a124d0e3996 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.8 is affected
  • unaffected from 0 to 6.8 (excl.)
  • unaffected from 6.12.113 to 6.12.* (incl.)
  • unaffected from 6.18.56 to 6.18.* (incl.)
  • unaffected from 7.2.10 to 7.2.* (incl.)
  • unaffected from 7.3-rc6 to * (incl.)

References