PT-2026-8191 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-02-14 · CVE-2026-23183

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.19.0-rc6-next-2026012

Description A flaw exists in the Linux kernel's cgroup/dmem subsystem where a NULL pointer dereference can occur when setting the maximum memory limit. This issue is triggered when attempting to set a maximum value without proper validation of the region name, such as using the command "echo test/region0 > dmem.max". The dereference leads to a kernel panic, potentially causing system instability.

Recommendations Update to Linux kernel version 6.19.0-rc6-next-2026012 or a later version to address this issue.

Exploit

Related Identifiers

CVE-2026-23183

Affected Products

Linux Kernel

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23183.json · Exploit
• https://ubuntu.com/security/CVE-2026-23183 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23183 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23183 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23183 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23183 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23183 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-23183 · Vendor Advisory
• https://git.kernel.org/stable/c/43151f812886be1855d2cba059f9c93e4729460b · Note
• https://git.kernel.org/stable/c/c13816e8fa23deec6a8d7465d9e637fd02683b5c · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/2022716625582010720 · Twitter Post
• https://git.kernel.org/linus/43151f812886be1855d2cba059f9c93e4729460b · Note