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Advisory severityHigh7.0Vendor: MediumRed Hat Linux

High [CVE-2026-52918] serialize accept_q access

This high-severity Red Hat Linux advisory covers CVE-2026-52918 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-2026-52918 Source published Source updated

VulniPulse record published Record updated

CVE-2026-52918
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: serialize accept_q access bt_sock_poll() walks the accept queue without synchronization, while child teardown can unlink the same socket and drop its last reference. The unsynchronized accept queue walk has existed since the initial Bluetooth import.

Protect accept_q with a dedicated lock for queue updates and polling. Also rework bt_accept_dequeue() to take temporary child references under the queue lock before dropping it and locking the child socket.

A race condition exists in the handling of the `accept_q` within the `bt_sock_poll()` function due to a lack of synchronization. This could allow a local attacker to cause a denial of service by manipulating socket operations during child teardown, leading to system instability.

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-820.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6.

Red Hat fixing advisory: RHSA-2026:65334, RHSA-2026:70403, RHSA-2026:70402, RHSA-2026:67150.

Affected products named by the advisory: Red Hat package: kernel-rt.

Is CVE-2026-52918 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-52918 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-2026-52918?

Upgrade to a fixed release named by Red Hat:

  • kernel-0:6.12.0-211.53.1.el10_2
  • kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10
  • kernel-0:4.18.0-553.166.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:65334
  • RHSA-2026:70403
  • RHSA-2026:70402
  • 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 13 days ago·verify at source

Fixed versions
  • kernel-0:6.12.0-211.53.1.el10_2
  • kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10
  • kernel-0:4.18.0-553.166.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:65334
  • RHSA-2026:70403
  • RHSA-2026:70402
  • RHSA-2026:67150

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation

Upgrade to a fixed release: kernel-0:6.12.0-211.53.1.el10_2, kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10, kernel-0:4.18.0-553.166.1.el8_10, kernel-0:5.14.0-687.47.1.el9_8, RHSA-2026:65334, RHSA-2026:70403. 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 13 days ago·verify at source

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