CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/gfx: fix cleaner shader IB buffer overflow The cleaner shader sysfs path allocates a 16-dword (64 byte) IB but incorrectly fills (align_mask + 1) dwords. On GFX rings align_mask is 0xff, so the loop wrote 256 dwords into a 64-byte buffer, causing a kernel page fault. The IB only needs to be a minimal NOP shell to schedule the job; the cleaner shader itself is emitted on the ring via emit_cleaner_shader(). Fill 16 dwords to match the allocation. v2: Use ib_size_dw variable (Lijo) (cherry picked from commit bf21af331ebf72d0935fd70c73192414a422c03a) A flaw was found in the Linux kernel's `drm/amdgpu/gfx` component. A local attacker could exploit a buffer overflow vulnerability in the cleaner shader's `sysfs` path. This occurs because the system incorrectly writes 256 double words (dwords) into a buffer allocated for only 16 dwords (64 bytes). Successful exploitation leads to a kernel page fault, causing a denial of service (DoS) on the system.
Multiple vulnerabilities have been discovered in the Linux kernel of Debian. These vulnerabilities allow for privilege escalation, data compromise, and denial of service. The affected Debian versions are prior to 6.12.10…