CVE-2026-74489
Linux mac80211 use-after-free in BA session stop may lead to kernel crash or escalation.
Is CVE-2026-74489 being exploited?
Not confirmed. CVE-2026-74489 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.22% probability of exploitation in the next 30 days.
How severe is CVE-2026-74489?
CVE-2026-74489 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74489?
Yes. A fix has been recorded for CVE-2026-74489. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74489 affect?
CVE-2026-74489 affects Linux kernel (mac80211 Wi‑Fi subsystem). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74489?
Upgrade Linux kernel to the vendor's patched mac80211 release.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Kernel use-after-free in mac80211 during BA session stop; can crash kernel or enable local/adjacent privilege escalation or RCE.
Patch when possible
- affected>= 98acd4c1d9f7dc9c426e840c16e81b57315ff84b and < 09fc36eec7841cdf732f4db39855e0c73bd075cc
- affected>= 98acd4c1d9f7dc9c426e840c16e81b57315ff84b and < 2f067f5a450ea07efd249142a11d940a068fe29c
- affected7.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.