CVE-2026-74407
Race condition in ath11k PCI/MHI SSR can crash Linux kernel during reboot.
Is CVE-2026-74407 being exploited?
Not confirmed. CVE-2026-74407 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-2026-74407?
CVE-2026-74407 is rated High. 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-2026-74407?
Yes. A fix has been recorded for CVE-2026-74407. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74407 affect?
CVE-2026-74407 affects Linux kernel (ath11k driver), PCI/MHI-based Qualcomm WLAN devices (e.g., WCN6855). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74407?
Install vendor kernel patches and reboot; disable or remove affected PCI Wi‑Fi as interim mitigation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
SSR recovery racing with PCI shutdown can cause NULL pointer deref -> kernel panic/DoS; triggering WLAN firmware crash may crash hosts.
Patch when possible
- affected>= 13da397f884d9c9a3fb6616206eeb6c6ab097287 and < 53dd29e8aeb2a1b5f079178551836b85fc6b53df
- affected>= 13da397f884d9c9a3fb6616206eeb6c6ab097287 and < 8c79aac429b583301f387374ff37c59be671df87
- affected5.19
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.