PT-2024-11140 · Linux · Linux Kernel

Quanyang Wang · Published 2021-04-16 · Updated 2024-12-09 · CVE-2021-47048

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 use-after-free issue has been resolved in the Linux kernel, specifically in the spi-zynqmp-gqspi component. The issue occurs when handling op->addr, which uses the buffer "tmpbuf" after it has been freed, triggering a use-after-free KASAN warning. To fix this issue, temporary variables are used to store op->addr.val and op->cmd.opcode.

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:2025-05315

CVE-2021-47048

Affected Products

Linux Kernel

References · 22

• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47048 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-05315 · Security Note
• https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62 · Patch
• https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c · Patch
• https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-47048 · Vendor Advisory
• https://git.kernel.org/stable/c/1231279389b5e638bc3b66b9741c94077aed4b5a · Patch
• https://cve.org/CVERecord?id=CVE-2021-47048 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47048 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47048 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47048 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47048 · Security Note
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=1231279389b5e638bc3b66b9741c94077aed4b5a · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21 · Note
• https://t.me/cvenotify/103594 · Telegram Post