CVE-2026-64522

linux: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mode block underflow on I...

CVE-2026-64522 is fixed in 20 products on 1 platform, first by ALAS2023-2026-1881, released June 22, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
8.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0051
43rd percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool6.18 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel-livepatch-6.18.35-68.127 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-devel · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-headers · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-tools · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
linux · Debian 14 7.0.12-1 DEBIAN-CVE-2026-64522 Jul 26, 2026
microvm-kernel6.18 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
perf6.18 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
python3-perf6.18 · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.35-68.127.amzn2023 ALAS2023-2026-1881 Jun 22, 2026

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