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Advisory severityHigh7.0Vendor: MediumRed Hat Linux

High [CVE-2026-52917] reject stale associations in dump_one path

This high-severity Red Hat Linux advisory covers CVE-2026-52917 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-52917 Source published Source updated

VulniPulse record published Record updated

CVE-2026-52917
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: diag: reject stale associations in dump_one path The SCTP exact sock_diag lookup can hold a transport reference, block on lock_sock(sk), and then resume after sctp_association_free() has marked the association dead and freed its bind address list.

When that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting. In particular, inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a real sctp_sockaddr_entry and trigger an out-of-bounds read from unrelated association memory.

Reject the association after taking the socket lock if it has been reaped or detached from the endpoint, and report the lookup as stale. This keeps the exact dump-one path from formatting torn association state.

A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) diagnostics. When performing a socket diagnostic (sock_diag) lookup, the system may attempt to access memory related to an SCTP association that has already been freed.

This can lead to an out-of-bounds read from unrelated memory, potentially allowing an attacker to access sensitive information or cause a system crash. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-825.

Is CVE-2026-52917 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-52917 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-52917?

Upgrade to a fixed release named by Red Hat:

  • kernel-0:6.12.0-211.67.1.el10_2
  • kernel-rt-0:4.18.0-553.162.1.rt7.503.el8_10
  • kernel-0:4.18.0-553.162.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:85321
  • RHSA-2026:66324
  • RHSA-2026:66325
  • RHSA-2026:67150

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Fixed versions
  • kernel-0:6.12.0-211.67.1.el10_2
  • kernel-rt-0:4.18.0-553.162.1.rt7.503.el8_10
  • kernel-0:4.18.0-553.162.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:85321
  • RHSA-2026:66324
  • RHSA-2026:66325
  • RHSA-2026:67150

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Mitigation

Upgrade to a fixed release: kernel-0:6.12.0-211.67.1.el10_2, kernel-rt-0:4.18.0-553.162.1.rt7.503.el8_10, kernel-0:4.18.0-553.162.1.el8_10, kernel-0:5.14.0-687.47.1.el9_8, RHSA-2026:85321, RHSA-2026:66324. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

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