PT-2026-45904 · Linux · Linux Kernel

CVE-2026-53209 · Published 2026-06-03 · Updated 2026-07-21

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description An issue exists in the Bluetooth component where the hci adv bcast annoucement() function fails to properly validate the size of the combined data when prepending Broadcast Announcement service data to an existing advertising payload. If the existing payload already contains the maximum extended advertising data, the resulting combined data may exceed the capacity of the temporary buffer used to rebuild the advertising data, leading to a buffer overrun.

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

Exploit

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-53209

ECHO-A2E6-610A-5722

SUSE-SU-2026:3130-1

SUSE-SU-2026:3166-1

Affected Products

Linux Kernel

References · 1077

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53209.json · Exploit
• https://git.kernel.org/stable/c/10b0e832cc05d7aef4b92bed912cbd4a395d0862 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-53209 · Security Note
• https://git.kernel.org/stable/c/1338ee049a8910ba6c9cee963920e978e6893c7d · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:3130-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-53209 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-53209 · Vendor Advisory
• https://git.kernel.org/stable/c/cdd8bbdbee763fdf5bf343e6f7d4e79347739f62 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-53209 · Vendor Advisory
• https://git.kernel.org/stable/c/dafc9f57140e66a10945127aa7433c3d715dc253 · Patch
• https://cve.org/CVERecord?id=CVE-2026-53209 · Security Note
• https://ubuntu.com/security/CVE-2026-53209 · Vendor Advisory
• https://git.kernel.org/stable/c/02f50e8bb69f9b22516163a09922f5537d3b12d1 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:3166-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-53209 · Vendor Advisory