cbcvebase.
CVE-2026-46234
published 2026-05-28

CVE-2026-46234: 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…

medium5.5
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

10 ranges
VendorProductVersion rangeFixed in
linuxlinux——
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < f6ec135941d2c1c2dbb87b5ce1783f4f6ac6cccaf6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < caf11dfea5233a69298a1c448bbf8d1639c80536caf11dfea5233a69298a1c448bbf8d1639c80536
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < 01ef69785dc3162f588a361ab770b1e31280018801ef69785dc3162f588a361ab770b1e312800188
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < a998a7e250bf976539e05a00ec64a81292afecaaa998a7e250bf976539e05a00ec64a81292afecaa
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < 310da27932dd0afe7ce7456dfe1f0814c3301f41310da27932dd0afe7ce7456dfe1f0814c3301f41
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < 2602f7bb5818e92315feeaeb71d8ce4d5c9ab1602602f7bb5818e92315feeaeb71d8ce4d5c9ab160
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < 0b68881501460c3761f196469e1e503218c5e5360b68881501460c3761f196469e1e503218c5e536
linuxlinux>= b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 < d114bfdc9b76bf93b881e195b7ec957c14227babd114bfdc9b76bf93b881e195b7ec957c14227bab
linuxlinux_kernel——