PT-2024-1999 · Linux+5 · Linux Kernel+5

Published 2024-01-11 · Updated 2025-10-13 · CVE-2024-26596

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

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

Description The issue is related to a slab-out-of-bounds error in the dsa user prechangeupper function, which occurs when a NETDEV PRECHANGEUPPER event is emitted with a VLAN as its new upper. This happens because not all net devices have a netdev priv of type struct dsa user priv, but the code attempts to dereference it anyway. The error is triggered when the dummy interface is used with a VLAN, causing the kernel to access memory outside the allocated bounds.

Technical details about exploitation include:

• The dsa user to port function, which returns a struct dsa port pointer.
• The netdev priv function, which returns a pointer to the private data of a network device.
• The dsa user prechangeupper function, which is called when a NETDEV PRECHANGEUPPER event occurs.
• The dsa user netdevice event function, which handles network device events.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALSA-2025_12746

ALSA-2025_12752

ALSA-2025_12753

ALSA-2025_16880

ALT-PU-2024-10855

ALT-PU-2025-12647

AZL-39884

BDU:2024-01856

CVE-2024-26596

DLA-4102-1

OPENSUSE-SU-2024_4314-1

OPENSUSE-SU-2024_4316-1

SUSE-SU-2024:4314-1

SUSE-SU-2024:4316-1

SUSE-SU-2024:4318-1

SUSE-SU-2025:0289-1

SUSE-SU-2025:20163-1

SUSE-SU-2025:20164-1

SUSE-SU-2025:20246-1

SUSE-SU-2025:20247-1

Affected Products

Alt Linux

Astra Linux

Debian

Linux Kernel

Red Os

Suse

References · 1919

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26596.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2024:4318-1 · Vendor Advisory
• https://git.kernel.org/stable/c/844f104790bd69c2e4dbb9ee3eba46fde1fcea7b · Patch
• https://osv.dev/vulnerability/CVE-2024-26596 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20164-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-26596 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:4314-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:4316-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-26596 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26596 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2024-26596 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:0289-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-01856 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:20246-1 · Vendor Advisory