01 Record

CVE-2026-31414

netfilter: nf_conntrack_expect: use expect->helper

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

netfilter: nf_conntrack_expect: use expect->helper

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 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

0.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.2% of scored records. A rank, not a probability.

NVD base score

9.8 (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: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

2026-04-13 13:21Z6 MO AGO

Last updated

2026-10-19 18:35Z10 DAYS AGO

Reserved

2026-03-09

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

f3a87afef1b283d80eac7a5093ee58aca40356084dfb85eca409dff66c5f669e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781, ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < e7ccaa0a62a8ff2be5d521299ce79390c318d306, ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 4bd1b3d839172724b33d8d02c5a4ff6a1c775417, ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < b53294bff19e56ada2f230ceb8b1ffde61cc3817, ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < 3dfd3f7712b5a800f2ba632179e9b738076a51f0, ea781f197d6a835cbb93a0bf88ee1696296ed8aa to < f01794106042ee27e54af6fdf5b319a2fe3df94d, 2.6.30—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
git.kernel.orghttps://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
git.kernel.orghttps://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
git.kernel.orghttps://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
git.kernel.orghttps://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
git.kernel.orghttps://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d
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 6.19.12-1

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