CVE-2024-26844: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in.

Is your site exposed to CVE-2024-26844?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 6.1.80
linux	linux_kernel	6.2 — 6.6.19
linux	linux_kernel	6.7 — 6.7.7
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b https://git.kernel.org/stable/c/0f1bae071de9967602807472921829a54b2e5956 https://git.kernel.org/stable/c/13f3956eb5681a4045a8dfdef48df5dc4d9f58a6 https://git.kernel.org/stable/c/8fc80874103a5c20aebdc2401361aa01c817f75b https://git.kernel.org/stable/c/cbaf9be337f7da25742acfce325119e3395b1f1b

Frequently Asked Questions

What is CVE-2024-26844? +

In the Linux kernel, the following vulnerability has been resolved: block: Fix WARNING in _copy_from_iter Syzkaller reports a warning in _copy_from_iter because an iov_iter is supposedly used in the wrong direction. The reason is that syzcaller managed to generate a request with a transfer direction of SG_DXFER_TO_FROM_DEV. This instructs the kernel to copy user buffers into the kernel, read into the copied buffers and then copy the data back to user space. Thus the iovec is used in both directions. Detect this situation in the block layer and construct a new iterator with the correct direction for the copy-in. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26844? +

CVE-2024-26844 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-26844? +

CVE-2024-26844 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-26844? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-9588 10.0

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Iron Mountain Archiving Services Inc. …

CVE-2025-57870 10.0

A SQL Injection vulnerability exists in Esri ArcGIS Server versions 11.3, 11.4 and 11.5 on Windows, Linux and Kubernetes. This …

CVE-2026-48286 10.0

Adobe Campaign Classic (ACC) versions 7.4.3 build 9396 and earlier are affected by an Incorrect Authorization vulnerability that could result …

CVE-2026-13782 10.0

Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer …

CVE-2026-48449 10.0

Adobe Campaign Classic (ACC) is affected by an Incorrect Authorization vulnerability that could result in arbitrary code execution in the …

CVE-2026-48303 10.0

Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization vulnerability that could result …

CVE-2024-26844