PT-2025-49662 · Linux+2 · Linux Kernel+2

Published 2025-12-09 · Updated 2026-03-26 · CVE-2023-53802

Positive Technologies (AI Summary)

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

Description A flaw exists in the Linux kernel’s ath9k module, specifically within the ath9k htc rx msg() function. This function is responsible for either freeing a socket buffer (skb) or passing its management to a callback function. However, the skb is not freed when no callback function is present, leading to a memory leak. The issue was identified by the Linux Verification Center using Syzkaller.

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

Exploit

Related Identifiers

CVE-2023-53802

SUSE-SU-2026:0263-1

SUSE-SU-2026:0317-1

SUSE-SU-2026:0411-1

SUSE-SU-2026:0617-1

SUSE-SU-2026:1078-1

Affected Products

Linux Kernel

Syzkaller

Ath9K

References · 1101

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53802.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53802 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53802 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2023-53802 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1078-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53802 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53802 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53802 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53802 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53802 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0411-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0263-1 · Vendor Advisory
• https://bugzilla.suse.com/1255996 · Note