01 Record

CVE-2026-74621

net/sched: act_ct: fix sk_buff leak when the header checks reject a packet

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

View raw JSON

02 Description

net/sched: act_ct: fix sk_buff leak when the header checks reject a packet

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited 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

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 41.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2026-08-22 15:32Z2 MO AGO

Last updated

2026-10-16 19:06Z13 DAYS AGO

Reserved

2026-08-15

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-772Missing Release of Resource after Effective LifetimeBase

Data version

5.2

Document digest

880b0b6850a3b9a6960dbf35e23b8e0709cc8f436ea3ca37baa6138a76ce027c

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux172ba7d46c202e679f3ccb10264c67416aaeb1c4 to < b5dbecc2016e1692fd1c2532af9c41ba729cb747, 0b5b831122fc3789fff75be433ba3e4dd7b779d4 to < 23e97d594ddd0153020c506d5041048fbde1beb4, 73f7da5fd124f2cda9161e2e46114915e6e82e97 to < 737873a59905a54ca0d2d127ef882f3f88bf4379, 3f14b377d01d8357eba032b4cabc8c1149b458b6 to < 47d99828591d0fe8be4b9c8992ff3b8e47968db9, 3f14b377d01d8357eba032b4cabc8c1149b458b6 to < b47bb899e04b5407c5a63fe88d4b6676586a6e84, 3f14b377d01d8357eba032b4cabc8c1149b458b6 to < 439d3e404f9d5e515911cc8132cde198b337c19e, 3f14b377d01d8357eba032b4cabc8c1149b458b6 to < 8a7ed561671aa6a911a2de99e59ef670a4d0b1df, f5346df0591d10bc948761ca854b1fae6d2ef441, 5.15.148 to < 5.15.217, 6.1.75 to < 6.1.184, 6.6.14 to < 6.6.152, 6.7.2 to < 6.8, 6.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/b5dbecc2016e1692fd1c2532af9c41ba729cb747
git.kernel.orghttps://git.kernel.org/stable/c/23e97d594ddd0153020c506d5041048fbde1beb4
git.kernel.orghttps://git.kernel.org/stable/c/737873a59905a54ca0d2d127ef882f3f88bf4379
git.kernel.orghttps://git.kernel.org/stable/c/47d99828591d0fe8be4b9c8992ff3b8e47968db9
git.kernel.orghttps://git.kernel.org/stable/c/b47bb899e04b5407c5a63fe88d4b6676586a6e84
git.kernel.orghttps://git.kernel.org/stable/c/439d3e404f9d5e515911cc8132cde198b337c19e
git.kernel.orghttps://git.kernel.org/stable/c/8a7ed561671aa6a911a2de99e59ef670a4d0b1df

07 Fixed in

Debian 12

linux
Fixed in 6.1.187-1
linux-6.12
Fixed in 6.12.107-1~deb12u1

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

Debian 13

linux
Fixed in 6.12.105-1

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

Debian 14

linux
Fixed in 7.1.9-1

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