PT-2024-11282 · Linux · Linux Kernel

Hulk Robot · Published 2021-06-09 · Updated 2024-12-26 · CVE-2021-47278

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A possible use-after-free issue has been identified in the Linux kernel, specifically in the mhi pci remove() function of the bus: mhi: pci generic driver. The driver's remove path calls del timer(), but this function does not wait until the timer handler finishes, potentially resulting in a use-after-free. This issue is resolved by calling del timer sync(), which ensures the timer handler has finished and cannot re-schedule itself.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-07342

CVE-2021-47278

Affected Products

Linux Kernel

References · 12

• https://cve.org/CVERecord?id=CVE-2021-47278 · Security Note
• https://git.kernel.org/stable/c/c597d5c59c7a6417dba06590f59b922e01188e8d · Patch
• https://ubuntu.com/security/CVE-2021-47278 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47278 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47278 · Vendor Advisory
• https://git.kernel.org/stable/c/0b67808ade8893a1b3608ddd74fac7854786c919 · Patch
• https://bdu.fstec.ru/vul/2025-07342 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47278 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2024052152-CVE-2021-47278-8b68@gregkh · Note
• https://twitter.com/CVEnew/status/1792928007092347041 · Twitter Post
• https://git.kernel.org/linus/0b67808ade8893a1b3608ddd74fac7854786c919 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.11 · Note