PT-2024-21489 · Linux · Linux Kernel

Published 2024-04-03 · Updated 2024-04-04 · CVE-2024-26721

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability has been resolved in the Linux kernel, specifically in the drm/i915/dsc component. The issue arises from a macro that calculates the DSCC /DSCA PPS register address, which correctly calculates addresses up to PPS 11 but fails to account for a discontinuity in the address space after PPS 11. This discontinuity, caused by RC Buffer memory allocation, results in the macro calculating incorrect addresses for PPS 12-16, leading to incorrect DSC PPS parameter value read/writes and causing DSC corruption. The fix involves correcting the macro to add an offset of 12 for PPS >= 12.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-131

Related Identifiers

CVE-2024-26721

Affected Products

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26721.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2024-26721 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-26721 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26721 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-26721 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2024-26721 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-26721 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-26721 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-26721 · Vendor Advisory
• https://git.kernel.org/stable/c/962ac2dce56bb3aad1f82a4bbe3ada57a020287c · Patch
• https://git.kernel.org/stable/c/ff5999fb03f467e1e7159f0ddb199c787f7512b9 · Patch
• https://docs.bell-sw.com/security/cves/CVE-2024-26721 · Note
• https://git.kernel.org/linus/962ac2dce56bb3aad1f82a4bbe3ada57a020287c · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note