PT-2024-11075 · Linux · Linux Kernel

CVE-2021-46965 · Published 2021-03-11 · Updated 2025-01-08

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The issue is related to an unintentional stack access in the Linux kernel, specifically in the mtd: physmap: physmap-bt1-rom module. The problem arises because the data variable is of type u32, and any increment to &data will be in 4-byte chunks, whereas the code intends to use a byte offset. To fix this, the &data is cast to (char *) to avoid unintentionally accessing the stack.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2025-02854

CVE-2021-46965

Affected Products

Linux Kernel

References · 22

• https://git.kernel.org/stable/c/4d786870e3262ec098a3b4ed10b895176bc66ecb · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46965 · Vendor Advisory
• https://git.kernel.org/stable/c/34ec706bf0b7c4ca249a729c1bcb91f706c7a7be · Patch
• https://git.kernel.org/stable/c/683313993dbe1651c7aa00bb42a041d70e914925 · Patch
• https://osv.dev/vulnerability/CVE-2021-46965 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-02854 · Security Note
• https://git.kernel.org/stable/c/4e4ebb827bf09311469ffd9d0c14ed40ed9747aa · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-46965 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-46965 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46965 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-46965 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46965 · Vendor Advisory
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=34ec706bf0b7c4ca249a729c1bcb91f706c7a7be · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36 · Note