PT-2026-44357 · Linux · Linux

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-46234

Mitre

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

vsock: fix buffer size clamping order

In vsock update buffer size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint.

This breaks the intended socket memory boundaries by allowing the vsk->buffer size to grow beyond the configured vsk->buffer max size.

Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer max size.

Related Identifiers

CVE-2026-46234

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-46234 · Security Note
• https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab · Note
• https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41 · Note
• https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 · Note
• https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa · Note
• https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536 · Note