Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.5, < 5.10.258 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/01ef69785dc3162f588a361ab770b1e312800188Patch
- https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536Patch
- https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160Patch
- https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41Patch
- https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaaPatch
- https://git.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536Patch
- https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227babPatch
- https://git.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6cccaPatch
FAQ
What is CVE-2026-46234?
CVE-2026-46234 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 t...
How severe is CVE-2026-46234?
CVE-2026-46234 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46234?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.