Access of Uninitialized Pointer Affecting kernel-rt-64k-debug package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.22% (13th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-CENTOS10-KERNELRT64KDEBUG-18993279
  • published20 Aug 2026
  • disclosed15 Aug 2026

Introduced: 15 Aug 2026

NewCVE-2026-72447  (opens in a new tab)
CWE-824  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 kernel-rt-64k-debug.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-64k-debug package and not the kernel-rt-64k-debug package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

sctp: hold socket lock when dumping endpoints in sctp_diag

SCTP_DIAG endpoint dumping was traversing endpoint address lists without holding lock_sock(), while those lists could change concurrently via socket operations (e.g., bindx changes). This creates a race where nla_reserve() counts addresses under RCU protection, but the subsequent copy may see fewer entries, potentially leaking uninitialized memory to userspace.

Fix this by:

  • Taking a reference on each endpoint during hash traversal
  • Moving socket operations (lock_sock()) outside read_lock_bh()
  • Serializing address list access during dump
  • Reworking sctp_for_each_endpoint() to support restart-based traversal with (net, pos) tracking

Also:

  • Add WARN_ON_ONCE() for inconsistent address counts
  • Fix idiag_states filtering for LISTEN vs association cases
  • Skip dumping endpoints being freed (ep->base.dead)
  • Move dump position tracking into iterator, removing cb->args[4] and its comment for sctp_ep_dump().,
  • Update the comment for cb->args[4] and remove the comment for unused cb->args[5] for sctp_sock_dump().

Note: traversal is restart-based and may re-scan buckets multiple times, but this is acceptable due to small bucket sizes and required to support sleeping-safe callbacks.

This issue was reported by Nico Yip (@cyeaa) working with TrendAI Zero Day Initiative.

CVSS Base Scores

version 3.1