CVE-2026-64522

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 v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/abe003b33223ff33552f291644bf35d9c2f992fb
https://git.kernel.org/stable/c/b5bd4249e430f5963d559708ee96a671716d2400
https://git.kernel.org/stable/c/ecafd8284e527666e83261e6e57a7c7341d591cb

Configurations

No configuration.

History

19 Oct 2026, 21:17

Type	Values Removed	Values Added
CWE		CWE-190

Information

Published : 2026-07-25 10:17

Updated : 2026-10-19 21:17

NVD link : CVE-2026-64522

Mitre link : CVE-2026-64522

CVE.ORG link : CVE-2026-64522

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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