CVE-2026-64522High· 8.8▾ TwilightIn 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 har…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.5%
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.
Linux >= 22239eb258bc1e6ccdb2d3502fce1cc2b2a88386 < b5bd4249e430f5963d559708ee96a671716d2400Linux >= 22239eb258bc1e6ccdb2d3502fce1cc2b2a88386 < ecafd8284e527666e83261e6e57a7c7341d591cbLinux >= 22239eb258bc1e6ccdb2d3502fce1cc2b2a88386 < abe003b33223ff33552f291644bf35d9c2f992fbLinux 993c4ba71596c30418ba5a0ddcf4f9c2f431466aLinux >= 6.17.4 < 6.18Linux 6.18Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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