CVE-2021-26930

CVE-2021-26930 affects the Xen PV backend: Linux kernel 3.11–5.10.16 Ker-branch Xen blkback.c grants mapping references from the frontend and may discard errors or fail to update internal state, causing the caller to access unmapped space. The result is potential denial of service, information le...

CVE-2021-26932

CVE-2021-26932 affects Linux kernels 3.2 through 5.10.16 when used with Xen PV backends. The issue arises in grant-mapping error handling during batch hypercalls, where errors can be ignored or misreported, causing improper unmapping and potential downstream impact. Affected components include ar...

CVE-2021-26931

CVE-2021-26931 is a Linux kernel issue in Xen PV backend handling. Affected: kernel 2.6.39–5.10.16 when running Xen PV; vulnerable components include block/xen-blkback/blkback.c and xen-scsiback.c. Root cause: grant-mapping error handling could be treated as a plain bug, leading to a kernel crash...

CVE-2021-26934

CVE-2021-26934 affects the Linux kernel versions 4.18 through 5.10.16 as used by Xen. The root cause is that the backend allocation (be-alloc) mode of the drm_xen_front drivers was not intended to be a supported configuration, but this was not clearly stated in its support status entry. Public do...

CVE-2023-52933

CVE-2023-52933 affects the Linux kernel Squashfs xattr_ids handling. Two overflow flaws were exposed by a corrupted filesystem: on 64‑bit systems, sign extension of xattr_ids when multiplied by sizeof(struct squashfs_xattr_id) can overflow and yield an incorrect len; on 32‑bit systems, the unsign...