PT-2024-11465 · Linux+2 · Linux Kernel+2

Marek Vasut · Published 2021-10-16 · Updated 2024-10-31 · CVE-2021-47471

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 The issue is related to a NULL pointer dereference crash that occurs when unloading the driver. Specifically, mxsfb->crtc.funcs may already be NULL when unloading, leading to a NULL pointer dereference when calling mxsfb irq disable() via drm irq uninstall() from mxsfb unload(). To resolve this, the fix uses mxsfb->base to clear and mask the IRQ, as it remains valid.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-14239

CVE-2021-47471

OPENSUSE-SU-2024_2189-1

SUSE-SU-2024:2008-1

SUSE-SU-2024:2011-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2189-1

SUSE-SU-2024:2190-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1248

• https://osv.dev/vulnerability/SUSE-SU-2024:2019-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47471 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47471 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2190-1 · Vendor Advisory
• https://git.kernel.org/stable/c/3cfc183052c3dbf8eae57b6c1685dab00ed3db4a · Patch
• https://osv.dev/vulnerability/CVE-2021-47471 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47471 · Security Note
• https://ubuntu.com/security/CVE-2021-47471 · Vendor Advisory
• https://git.kernel.org/stable/c/f40c2281d2c0674d32ba732fee45222d76495472 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2008-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47471 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47471 · Vendor Advisory
• https://git.kernel.org/stable/c/b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2024:2189-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2011-1 · Vendor Advisory