Skip to content
VulniPulse
Sign in
Advisory severityHigh7.0Vendor: MediumRed Hat Linux

High [CVE-2026-53182] reject oversized EMA RNR lists

This high-severity Red Hat Linux advisory covers CVE-2026-53182 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-2026-53182 Source published Source updated

VulniPulse record published Record updated

CVE-2026-53182
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: reject oversized EMA RNR lists nl80211_parse_rnr_elems() stores the parsed element count in a u8-backed cfg80211_rnr_elems::cnt field and uses that count to size the flexible array allocation.

Reject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches 255, before incrementing it again. This keeps the parser aligned with the data structure it fills and matches the existing bound check used by nl80211_parse_mbssid_elems().

The nl80211_parse_rnr_elems() function, responsible for parsing EMA RNR (Enhanced Multiple Access Reduced Neighbor Report) lists, does not properly handle an excessive number of nested NL80211_ATTR_EMA_RNR_ELEMS inputs.

This improper input validation could allow a remote attacker to cause a denial of service (DoS) by providing an oversized EMA RNR list, potentially leading to system instability or a 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-770. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6.

Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat fixing advisory: RHSA-2026:65334, RHSA-2026:67469, RHSA-2026:67468, RHSA-2026:67150.

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

Is CVE-2026-53182 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53182 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-2026-53182?

Upgrade to a fixed release named by Red Hat:

  • kernel-0:6.12.0-211.53.1.el10_2
  • kernel-rt-0:4.18.0-553.163.1.rt7.504.el8_10
  • kernel-0:4.18.0-553.163.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:65334
  • RHSA-2026:67469
  • RHSA-2026:67468
  • 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-0:6.12.0-211.53.1.el10_2
  • kernel-rt-0:4.18.0-553.163.1.rt7.504.el8_10
  • kernel-0:4.18.0-553.163.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:65334
  • RHSA-2026:67469
  • RHSA-2026:67468
  • RHSA-2026:67150

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

Mitigation

Upgrade to a fixed release: kernel-0:6.12.0-211.53.1.el10_2, kernel-rt-0:4.18.0-553.163.1.rt7.504.el8_10, kernel-0:4.18.0-553.163.1.el8_10, kernel-0:5.14.0-687.47.1.el9_8, RHSA-2026:65334, RHSA-2026:67469. 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

Get an email when Red Hat Linux Kernel publishes the next one.

See Red Hat Linux Kernel's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat Linux Kernel

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.