CVE-2026-74528
Linux kernel Bluetooth use-after-free enabling kernel memory corruption.
Is CVE-2026-74528 being exploited?
Not confirmed. CVE-2026-74528 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 0.23% probability of exploitation in the next 30 days.
How severe is CVE-2026-74528?
CVE-2026-74528 is rated High with a CVSS score of 8.0. 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-2026-74528?
Yes. A fix has been recorded for CVE-2026-74528. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74528 affect?
CVE-2026-74528 affects Linux kernel (Bluetooth subsystem). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74528?
Apply vendor/kernel updates or disable Bluetooth until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Use-after-free in hci_sync can cause kernel memory corruption, enabling denial of service or local privilege escalation via Bluetooth connections.
Patch when possible
- affected>= d3413703d5f8b7d1e6f514f9440ed5da1bc30796 and < e6792adef614b389141b142e30ee549e4a47dd7d
- affected>= d3413703d5f8b7d1e6f514f9440ed5da1bc30796 and < abf9753edf3f88282c44a605f3945d8d4f8dd86c
- affected6.19
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.