CVE-2026-46234
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
28/05/2026
Last modified:
28/05/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
vsock: fix buffer size clamping order<br />
<br />
In vsock_update_buffer_size(), the buffer size was being clamped to the<br />
maximum first, and then to the minimum. If a user sets a minimum buffer<br />
size larger than the maximum, the minimum check overrides the maximum<br />
check, inverting the constraint.<br />
<br />
This breaks the intended socket memory boundaries by allowing the<br />
vsk->buffer_size to grow beyond the configured vsk->buffer_max_size.<br />
<br />
Fix this by checking the minimum first, and then the maximum. This<br />
ensures the buffer size never exceeds the buffer_max_size.
Impact
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536
- https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160
- https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41
- https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa
- https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab



