01 Record

CVE-2026-31665

netfilter: nft_ct: fix use-after-free in timeout object destroy

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

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02 Description

netfilter: nft_ct: fix use-after-free in timeout object destroy

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

0.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 2.0% 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

Modified. NVD last modified this record on 2026-10-19.

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

2026-04-24 14:45Z6 MO AGO

Last updated

2026-10-19 18:56Z10 DAYS AGO

Reserved

2026-03-09

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-416Use After FreeVariant

Data version

5.2

Document digest

f8dde5df3352634a085c5a90e87aa9a86993f2902cb8c2ed3e0d147d3c2af1c9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7e0b2b57f01d183e1c84114f1f2287737358d748 to < c458fc1c278a65ad5381083121d39a479973ebed, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < c581e5c8f2b59158f62efe61c1a3dc36189081ff, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < f16fe84879a5280f05ebbcea593a189ba0f3e79a, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < 070abdf1b04325b21a20a2a0c39a2208af107275, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < aa7cfa16f98f8ec3e6d47c34e1a8c1ae4b9b8b77, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < b42aca3660dc2627a29a38131597ca610dc451f9, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < d0983b48c10d1509fd795c155f8b1e832e1369ff, 7e0b2b57f01d183e1c84114f1f2287737358d748 to < f8dca15a1b190787bbd03285304b569631160eda, 4.19—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/c458fc1c278a65ad5381083121d39a479973ebed
git.kernel.orghttps://git.kernel.org/stable/c/c581e5c8f2b59158f62efe61c1a3dc36189081ff
git.kernel.orghttps://git.kernel.org/stable/c/f16fe84879a5280f05ebbcea593a189ba0f3e79a
git.kernel.orghttps://git.kernel.org/stable/c/070abdf1b04325b21a20a2a0c39a2208af107275
git.kernel.orghttps://git.kernel.org/stable/c/aa7cfa16f98f8ec3e6d47c34e1a8c1ae4b9b8b77
git.kernel.orghttps://git.kernel.org/stable/c/b42aca3660dc2627a29a38131597ca610dc451f9
git.kernel.orghttps://git.kernel.org/stable/c/d0983b48c10d1509fd795c155f8b1e832e1369ff
git.kernel.orghttps://git.kernel.org/stable/c/f8dca15a1b190787bbd03285304b569631160eda
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.170-1

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

Debian 13

linux
Fixed in 6.12.85-1

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

Debian 14

linux
Fixed in 6.19.13-1

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