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.
Affected products
linux: linux kernel
References9
- git.kernel.org/stable/c/01ef69785dc3162f588a361ab770b1e312800188 Patch
- git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536 Patch
- git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 Patch
- git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41 Patch
- git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa Patch
- git.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536 Patch
- git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab Patch
- git.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca Patch
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 15 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
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