Skip to content
Systems

CVE-2026-74533

8.8
High
EPSS 0.22%Patch availableAug 17, 2026

Bluetooth ISO race in Linux kernel causes use-after-free in hci_conn.

common questions

Is CVE-2026-74533 being exploited?

Not confirmed. CVE-2026-74533 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-2026-74533?

CVE-2026-74533 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-2026-74533?

Yes. A fix has been recorded for CVE-2026-74533. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-74533 affect?

CVE-2026-74533 affects Linux kernel (Bluetooth ISO / hci_conn), Android devices using affected kernels, Embedded Linux devices with Bluetooth ISO support. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-74533?

Apply vendor/kernel Bluetooth updates; restrict or disable Bluetooth until patched.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary
technical analysis
affected
Linux kernel (Bluetooth ISO / hci_conn)Android devices using affected kernelsEmbedded Linux devices with Bluetooth ISO support
impact

Nearby Bluetooth attacker can trigger a use-after-free, causing kernel crash, privilege escalation, or potential arbitrary kernel code execution.

action required

Patch when possible

affected versions
Linux Linux
  • affected>= dc26097bdb864a0d5955b9a25e43376ffc1af99b and < 876a3e94c70d0859d1dad1c986112d4f0d99eba8
  • affected>= dc26097bdb864a0d5955b9a25e43376ffc1af99b and < af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c
  • affectedf53e7489273dc2bb307bf50f319b3762d45534f0
  • affecteda58d0f5dac322e16cc75334d000666512341bde5
  • affected>= 6.11.11 and < 6.12
  • affected>= 6.12.2 and < 6.13
  • affected6.13
vendor says fixed in< 6.13, >= 7.1.8 and <= 7.1.*, >= 7.2 and <= *

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.

how to fix
Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.
references
NVDCVE.orgCVE DetailsSource
get alerted

Track only the vulnerabilities that affect your infrastructure.

start for free