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CVE-2026-74531

HIGHCVSS 8.8/10EPSS 0.25%

Last modified

CVE-2026-74531 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.25%

17.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 249c88e7fb45b6b705040c5af4bd0d0f2bc9735c, < 64d1645f26aa49b5a86ba2fccd0bb6749ea725a6; >= 227a0cdf4a028a73dc256d0f5144b4808d718893, < 963fb4b8e7d1ab07b4ae45bf15d41e667c88caca; >= 227a0cdf4a028a73dc256d0f5144b4808d718893, < e8f9fef362bab431d95371d3406bc720350290c3; >= 227a0cdf4a028a73dc256d0f5144b4808d718893, < fa812cfa81aa3d4a7b6ce8277979af57b3f79712; >= 227a0cdf4a028a73dc256d0f5144b4808d718893, < 5761d003daa987ac81463f570713ce9c9dd204e5; 7fe4d391e937c2f048a43ff4b421e677f10d83c0; 58afdc9b18871eb1d461c725be9e9f3f44a39aeb; >= 6.6.51, < 6.6.151; >= 6.1.184, < 6.2; >= 6.10.10, < 6.11
LinuxLinux6.11

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74531?
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.
How severe is CVE-2026-74531?
CVE-2026-74531 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74531?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST