CVE-2024-46744

High

In the Linux kernel, the following vulnerability has been resolved: Squashfs: sanity check symbolic link size Syzkiller reports a "KMSAN: uninit-value in pick_link" bug. This is caused by an uninitialised page, which is ultimately caused by a corrupted symbolic link size read from disk. The reason why the corrupted symlink size causes an uninitialised page is due to the following sequence of events: 1. squashfs_read_inode() is called to read the symbolic link from disk. This assigns the corrupted value 3875536935 to inode->i_size. 2. Later squashfs_symlink_read_folio() is called, which assigns this corrupted value to the length variable, which being a signed int, overflows producing a negative number. 3. The following loop that fills in the page contents checks that the copied bytes is less than length, which being negative means the loop is skipped, producing an uninitialised page. This patch adds a sanity check which checks that the symbolic link size is not larger than expected. -- V2: fix spelling mistake.

Package Linux Kernel
Published 2024-09-18
Last modified 2026-05-12
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-59

CVE-2024-46744 is classified as CWE-59

See CWE-59 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 2.6.29 and later are affected. Fixed in 4.19.322, 5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51, 6.10.10, 6.11 and their respective stable series.

Affected from
≥ 2.6.29
Fixed in
✓ 4.19.322 4.19.x ✓ 5.4.284 5.4.x ✓ 5.10.226 5.10.x ✓ 5.15.167 5.15.x ✓ 6.1.110 6.1.x ✓ 6.6.51 6.6.x ✓ 6.10.10 6.10.x ✓ 6.11

References

The following references provide additional information about CVE-2024-46744 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

8 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2024-46744?

    CVE-2024-46744 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 2.6.29 onward and has been patched in 4.19.322, 5.4.284, 5.10.226 and others. CVE-2024-46744 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-46744?

    CVE-2024-46744 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2024-46744?

    Yes — CVE-2024-46744 has been patched. Fixed versions include 4.19.322, 5.4.284, 5.10.226 and others. If you are running Linux kernel 2.6.29 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-46744 actively exploited?

    No — CVE-2024-46744 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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