CVE-2022-50405 — NULL Pointer Dereference in Linux

CWE-476 — NULL Pointer DereferenceCWE-820 — Missing Synchronization5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 96.24%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedSep 18

Description

In the Linux kernel, the following vulnerability has been resolved: net/tunnel: wait until all sk_user_data reader finish before releasing the sock There is a race condition in vxlan that when deleting a vxlan device during receiving packets, there is a possibility that the sock is released after getting vxlan_sock vs from sk_user_data. Then in later vxlan_ecn_decapsulate(), vxlan_get_sk_family() we will got NULL pointer dereference. e.g. #0 [ffffa25ec6978a38] machine_kexec at ffffffff8c66975…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages4 packages

▶NVDlinux/linux_kernel3.18 — 4.9.337+7
▶Debianlinux/linux_kernel< 5.10.178-1+3
▶CVEListV5linux/linux6a93cc9052748c6355ec9d5b6c38b77f85f1cb0d — e8316584b0a6c61c9c407631040c22712b26e38c+9
▶debiandebian/linux< linux 6.1.4-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-c7j4-9pjm-j3r2: In the Linux kernel, the following vulnerability has been resolved: net/tunnel: wait until all sk_user_data reader finish before releasing the sock↗2025-09-18
▶
OSV
CVE-2022-50405: In the Linux kernel, the following vulnerability has been resolved: net/tunnel: wait until all sk_user_data reader finish before releasing the sock Th↗2025-09-18
▶

📋Vendor Advisories

2
Red Hat
kernel: net/tunnel: wait until all sk_user_data reader finish before releasing the sock↗2025-09-18
▶
Debian
CVE-2022-50405: linux - In the Linux kernel, the following vulnerability has been resolved: net/tunnel:...↗2022
▶
CVE-2022-50405 — NULL Pointer Dereference in Linux | cvebase