CVE-2026-46234
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.
How to fix
- linux linux_kernel5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9 or later
- git.kernel.org/stable/c/01ef69785dc3162f588a361ab770b1e312800188
- git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536
- git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160
- git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41
- git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa
- git.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536
- git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab
- git.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.5 ≤ v < 5.10.258, 5.11 ≤ v < 5.15.209, 5.16 ≤ v < 6.1.175, 6.2 ≤ v < 6.6.140, 6.7 ≤ v < 6.12.90, 6.13 ≤ v < 6.18.32, 6.19 ≤ v < 7.0.9 | 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9 |
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