PT-2024-21528 · Linux+4 · Linux Kernel+4

Published 2024-04-17 · Updated 2026-05-26 · CVE-2024-26844

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 warning in copy from iter has been reported by Syzkaller due to an iov iter being used in the wrong direction. This occurs when a request with a transfer direction of SG DXFER TO FROM DEV is generated, instructing the kernel to copy user buffers into the kernel, read into the copied buffers, and then copy the data back to user space. As a result, the iovec is used in both directions. The block layer detects this situation and constructs a new iterator with the correct direction for the copy-in.

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

Exploit

Incorrect Permission

Memory Leak

Weakness Enumeration

CWE-732

CWE-401

Related Identifiers

BDU:2025-13359

BDU:2026-02081

CVE-2024-26844

SUSE-SU-2024:2135-1

SUSE-SU-2024:2203-1

SUSE-SU-2024:2973-1

SUSE-SU-2025:20008-1

Affected Products

Astra Linux

Debian

Linux Kernel

Red Os

Suse

References · 1918

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26844.json · Exploit
• https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b · Patch
• https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-26844 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2024-26844 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-26844 · Security Note
• https://ubuntu.com/security/CVE-2024-26844 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2135-1 · Vendor Advisory
• https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 · Patch
• https://osv.dev/vulnerability/CVE-2024-26844 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-26844 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2973-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2024-26844 · Vendor Advisory
• https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 · Patch
• https://bdu.fstec.ru/vul/2026-02081 · Security Note