01 Record

CVE-2026-74262

kcm: use WRITE_ONCE() when changing lower socket callbacks

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

kcm: use WRITE_ONCE() when changing lower socket callbacks

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 7.7% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Received. NVD last modified this record on 2026-10-16.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-15 05:57Z2 MO AGO

Last updated

2026-10-16 18:55Z12 DAYS AGO

Reserved

2026-08-15

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

CWE-366Race Condition within a ThreadBase

Data version

5.2

Document digest

10a614d9443f6b30e30640200462fbb2279421bf7a51452bc48b32bde43ced41

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < 0cb3e2f40679032c1aa2186280a86e5ead0161ee, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < fa26e4606aed0f7fe793c325506adeda1d847a43, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < b4ccd6eef671d7c44a30123cd29f3acf3de8468e, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < b8c90823cdfb5f3d22f261aeb3e9066612853c36, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < 11faefd11ce2448bac7279ab302dd1954a6547fe, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < f01fb6138f8eb606b56ce9158e2d8b72352c53f4, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < 9684fff87124b201e11dea01ded9173025359a0f, ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 to < 47186409c092cd7dd70350999186c700233e854d, 4.6—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/0cb3e2f40679032c1aa2186280a86e5ead0161ee
git.kernel.orghttps://git.kernel.org/stable/c/fa26e4606aed0f7fe793c325506adeda1d847a43
git.kernel.orghttps://git.kernel.org/stable/c/b4ccd6eef671d7c44a30123cd29f3acf3de8468e
git.kernel.orghttps://git.kernel.org/stable/c/b8c90823cdfb5f3d22f261aeb3e9066612853c36
git.kernel.orghttps://git.kernel.org/stable/c/11faefd11ce2448bac7279ab302dd1954a6547fe
git.kernel.orghttps://git.kernel.org/stable/c/f01fb6138f8eb606b56ce9158e2d8b72352c53f4
git.kernel.orghttps://git.kernel.org/stable/c/9684fff87124b201e11dea01ded9173025359a0f
git.kernel.orghttps://git.kernel.org/stable/c/47186409c092cd7dd70350999186c700233e854d

07 Fixed in

Debian 12

linux
Fixed in 6.1.180-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.100-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.