Type Confusion in Linux kernel - CVE-2026-53184

Vulnerability identifier: #VU135609

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-53184

CWE-ID: CWE-843

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a type confusion in udp_read_skb() when processing UDP packets for a socket in a sockmap with an attached SK_SKB verdict program that performs a socket lookup. A remote attacker can send a specially crafted packet to cause a denial of service.

Exploitation requires a UDP socket to be in a sockmap and the attached verdict program to call a socket-lookup helper.

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - update to 6.6.0-145.1.20.157
bpftool - update to 6.6.0-145.1.20.157
bpftool-debuginfo - update to 6.6.0-145.1.20.157
kernel-debuginfo - update to 6.6.0-145.1.20.157
kernel-debugsource - update to 6.6.0-145.1.20.157
kernel-devel - update to 6.6.0-145.1.20.157
kernel-headers - update to 6.6.0-145.1.20.157
kernel-source - update to 6.6.0-145.1.20.157
kernel-tools - update to 6.6.0-145.1.20.157
kernel-tools-debuginfo - update to 6.6.0-145.1.20.157
kernel-tools-devel - update to 6.6.0-145.1.20.157
perf - update to 6.6.0-145.1.20.157
perf-debuginfo - update to 6.6.0-145.1.20.157
python3-perf - update to 6.6.0-145.1.20.157
python3-perf-debuginfo - update to 6.6.0-145.1.20.157

• https://git.kernel.org/stable/c/1b585673a2249f13678e7ac443ac683ba767e0b6
• https://git.kernel.org/stable/c/263779a6beff03b8b06f6d25566cb0f45af361f2
• https://git.kernel.org/stable/c/3c94f241f776562c489876ff506f366224565c21
• https://git.kernel.org/stable/c/6822eed69572000a181fa4e31fceacc60918c471
• https://git.kernel.org/stable/c/7d6d92d000ebe3a845a17c165c1d3a70c5d84fe1
• https://git.kernel.org/stable/c/90d35188aaa92b8f8b23f66335e0e91bf60103a3

• Type Confusion in Linux kernel ipv4
• openEuler 24.03 LTS SP1 update for kernel