What is CVE-2026-90093?

CVE-2026-90093 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.10.265 onward and patched in 7.2.6 and 7.3-rc1. CVE-2026-90093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-90093?

CVE-2026-90093 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-90093?

Yes, CVE-2026-90093 has been patched. Fixed versions include 7.2.6 and 7.3-rc1. If you are running Linux kernel 5.10.265 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-90093 actively exploited?

CVE-2026-90093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-90093

High

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: access chan->conn safely in get/setsockopt Since commit b66774b48dd9 ("Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref") l2cap_chan::conn has held reference and remains non-NULL also after the corresponding hci_conn is deleted. In this state accessing various fields eg. hci_conn::hdev is invalid, which leads to KASAN crash in l2cap_sock_setsockopt() access of conn->hcon->hdev. Check l2cap_chan::conn.hcon corresponds to an alive hci_conn before trying to use it in l2cap_sock.c. Hold l2cap_chan_lock() in getsockopt/setsockopt to ensure it stays alive, and to avoid data races in l2cap_chan fields.

Package Linux Kernel

Published 2026-09-17

Last modified 2026-09-18

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.10.265, 5.15.216, 6.1.183, 6.6.145, 6.12.97, 6.18.39, 7.1.4, 7.2 and later are affected. Fixed in 7.2.6, 7.3-rc1 and their respective stable series.

Affected from

≥ 5.10.265 ≥ 5.15.216 ≥ 6.1.183 ≥ 6.6.145 ≥ 6.12.97 ≥ 6.18.39 ≥ 7.1.4 ≥ 7.2

Fixed in

✓ 7.2.6 7.2.x ✓ 7.3-rc1

References

2 total

Details

CVE ID CVE-2026-90093

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-09-17

Modified 2026-09-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-90093?

CVE-2026-90093 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.10.265 onward and has been patched in 7.2.6 and 7.3-rc1. CVE-2026-90093 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-90093?

CVE-2026-90093 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-90093?

Yes. CVE-2026-90093 has been patched. Fixed versions include 7.2.6 and 7.3-rc1. If you are running Linux kernel 5.10.265 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-90093 actively exploited?

No. CVE-2026-90093 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.