PT-2025-52944 · Linux · Linux Kernel

Published 2025-12-24 · Updated 2025-12-27 · CVE-2023-53987

Positive Technologies (AI Summary)

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

Description A flaw exists in the Linux kernel related to a potential NULL dereference within the /proc/net/icmp interface when using ping sockets. The issue arose after a commit (dbca1596bbb0) transitioned ping sockets to utilize RCU lookups, but the spinlock was not correctly maintained for /proc/net/icmp, leading to the potential for a NULL dereference. The fix reverts to using a spinlock for /proc/net/icmp.

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

Exploit

Related Identifiers

CVE-2023-53987

Affected Products

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53987.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2023-53987 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53987 · Security Note
• https://osv.dev/vulnerability/CVE-2023-53987 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53987 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53987 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53987 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53987 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53987 · Vendor Advisory
• https://twitter.com/CVEnew/status/2004868117311488195 · Twitter Post
• https://git.kernel.org/stable/c/ab5fb73ffa01072b4d8031cc05801fa1cb653bee · Note
• https://git.kernel.org/stable/c/5a08a32e624908890aa0a2eb442bb6a7669891a8 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/stable/c/176cbb6da28f36506cc60a4bec4ab8df0c16713a · Note
• https://docs.bell-sw.com/security/cves/CVE-2023-53987 · Note