PT-2026-37556 · Linux · Linux Kernel

CVE-2026-43216 · Published 2026-05-06 · Updated 2026-07-04

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A deadlock can occur in the Linux kernel when skb may tx timestamp() acquires sock::sk callback lock within an IRQ (Interrupt Request) context. While softirq is permissible, taking this lock in a dedicated interrupt handler can lead to a system freeze if the lock is already write-locked on the same CPU. This happens because certain drivers process TX timestamps via dedicated interrupts.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-43216

ECHO-0EC8-B04E-F14B

OESA-2026-2675

OESA-2026-2676

Affected Products

Linux Kernel

References · 81

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43216.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-46065 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31607 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43088 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68198 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43413 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-46033 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43216 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45949 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31662 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-68183 · Security Note
• https://git.kernel.org/stable/c/983512f3a87fd8dc4c94dfa6b596b6e57df5aad7 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23213 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43198 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45968 · Security Note