01 Record

CVE-2026-31637

rxrpc: reject undecryptable rxkad response tickets

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

rxrpc: reject undecryptable rxkad response tickets

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

0.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 48.1% 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

2026-04-24 14:44Z6 MO AGO

Last updated

2026-10-19 18:56Z10 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-754Improper Check for Unusual or Exceptional ConditionsClass

Data version

5.2

Document digest

b6c665545c88d56adffce9499fb138911e0d9ca8cd71577d661a276574e40e4a

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux17926a79320afa9b95df6b977b40cca6d8713cea to < 252157d939d179b5d767cb860ff8fa7f8723b67a, 17926a79320afa9b95df6b977b40cca6d8713cea to < a75b3b361dd481d942c5f259a82d59718a41092c, 17926a79320afa9b95df6b977b40cca6d8713cea to < b3a808cd0790b5075aaa2bc3588edf02cd71d352, 17926a79320afa9b95df6b977b40cca6d8713cea to < 47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a, 17926a79320afa9b95df6b977b40cca6d8713cea to < a149dcae23309df9de1c3b6b5d468610ef5ab7de, 17926a79320afa9b95df6b977b40cca6d8713cea to < 22f6258e7b31dba9bf88dce4e3ee7f0f20072e60, 17926a79320afa9b95df6b977b40cca6d8713cea to < 58fcd1b156152613ba00a064a129fb69507ddd7d, 17926a79320afa9b95df6b977b40cca6d8713cea to < fe4447cd95623b1cfacc15f280aab73a6d7340b2, 2.6.22—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/252157d939d179b5d767cb860ff8fa7f8723b67a
git.kernel.orghttps://git.kernel.org/stable/c/a75b3b361dd481d942c5f259a82d59718a41092c
git.kernel.orghttps://git.kernel.org/stable/c/b3a808cd0790b5075aaa2bc3588edf02cd71d352
git.kernel.orghttps://git.kernel.org/stable/c/47073aab8a3a5a7b41c9bd37d2a3dcbeeccd6c8a
git.kernel.orghttps://git.kernel.org/stable/c/a149dcae23309df9de1c3b6b5d468610ef5ab7de
git.kernel.orghttps://git.kernel.org/stable/c/22f6258e7b31dba9bf88dce4e3ee7f0f20072e60
git.kernel.orghttps://git.kernel.org/stable/c/58fcd1b156152613ba00a064a129fb69507ddd7d
git.kernel.orghttps://git.kernel.org/stable/c/fe4447cd95623b1cfacc15f280aab73a6d7340b2
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784472.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.176-1

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.