Out-of-bounds read in Linux kernel - CVE-2026-53268
Published: June 26, 2026
Vulnerability identifier: #VU135490
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-53268
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the conntrack_irc helper when parsing IRC DCC commands. A remote attacker can send specially crafted IRC traffic to cause a denial of service.
How to mitigate CVE-2026-53268
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0afc802160af0df61ed374fdb97fb34cfe5cdf2f
- https://git.kernel.org/stable/c/4cdda7f868f48e2f81579371584fdbdce37df2c8
- https://git.kernel.org/stable/c/573810f61bcd6b6815e2ff53bbdd2b9c9d747176
- https://git.kernel.org/stable/c/66eba0ffce3b7e11449946b4cbbef8ea36112f56
- https://git.kernel.org/stable/c/7c34f91305292083253df6a9f6c8ede02d4ccaea
- https://git.kernel.org/stable/c/8a1d6e40dedfe1068aee094d851bd69e289c9fd6
- https://git.kernel.org/stable/c/9e5da2379f968a3ea5a6e38921ab6201576466dc
- https://git.kernel.org/stable/c/ddddd8271359961e403d11c90c9ba9fc38914f7e