Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by allocating software state and skipping hardware offload setup. That path jumps to the common success label before taking the eswitch mode block. After tunnel-mode validation was moved earlier, the common success label unconditionally calls mlx5_eswitch_unblock_mode(). For acquire SAs, this decrements esw->offloads.num_block_mode without a matching increment. Return directly after installing the acquire SA offload handle, so only the paths that successfully called mlx5_eswitch_block_mode() call the matching unblock.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/abe003b33223ff33552f291644bf35d9c2f992fb
- https://git.kernel.org/stable/c/b5bd4249e430f5963d559708ee96a671716d2400
- https://git.kernel.org/stable/c/ecafd8284e527666e83261e6e57a7c7341d591cb
FAQ
What is CVE-2026-64522?
CVE-2026-64522 is a vulnerability with a CVSS score of 8.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by alloc...
How severe is CVE-2026-64522?
CVE-2026-64522 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64522?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.