CVE-2026-31634 json
rxrpc: fix reference count leak in rxrpc_server_keyring()
published 2026-04-24 6 mo ago modified 2026-11-06 3 d ago also EUVD-2026-25527
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: fix reference count leak in rxrpc_server_keyring()
This patch fixes a reference count leak in rxrpc_server_keyring() by checking if rx->securities is already set.
Patch / fix
- Linux Linux 5.10.258, 5.15.203, 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13, 7.0
- linux Debian 12 6.1.170-1
- linux Debian 13 6.12.85-1
- linux Debian 14 6.19.13-1
debian advisories DEBIAN-CVE-2026-31634
- linux Ubuntu 22.04 LTS 5.15.0-186.196
- linux Ubuntu 24.04 LTS 6.8.0-136.136
- linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
- linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
- linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
- linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67
ubuntu advisories UBUNTU-CVE-2026-31634
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- git.kernel.org/stable/c/45d9584e51bdd61faf1900f82666d4ea6a85da72 commit
- git.kernel.org/stable/c/fc76d0bd00850b7372f0a4a319c0c60f80487632 commit
- git.kernel.org/stable/c/c6d9ea26cf8756ad6f162578e94a5f82f6fae3c2 commit
- git.kernel.org/stable/c/9ce36d28f67c2a477a7e2f03480de3f6783fb363 commit
- git.kernel.org/stable/c/12de9e0e0b0b7058be7dfb8a5927eb565bc25780 commit
- git.kernel.org/stable/c/8ee931c3cd97f1c42b4fbf057f04b9dae45dfb7a commit
- git.kernel.org/stable/c/139c750bf06649097d98b0bc41e2a678b4627e27 commit
- git.kernel.org/stable/c/f125846ee79fcae537a964ce66494e96fa54a6de commit
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-31634 updated cvss 5.5
kernel: rxrpc: fix reference count leak in rxrpc_server_keyring()
-
Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelaffected: no fix available “Fix deferred”
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
cisa ICSA-26-295-11 updated cvss 5.5
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP
-
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7affected: mitigation, no fix available
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
cisa ICSA-26-209-04 updated cvss 5.5
Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP
-
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6affected: mitigation, no fix available
Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 d ago
Exploit prediction
0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classification
- Technology feeds
References
- git.kernel.org /stable/c/45d9584e51bdd61faf1900f82666d4ea6a85da72
-
git.kernel.org
/stable/c/fc76d0bd00850b7372f0a4a319c0c60f80487632
patch
-
git.kernel.org
/stable/c/c6d9ea26cf8756ad6f162578e94a5f82f6fae3c2
patch
-
git.kernel.org
/stable/c/9ce36d28f67c2a477a7e2f03480de3f6783fb363
patch
-
git.kernel.org
/stable/c/12de9e0e0b0b7058be7dfb8a5927eb565bc25780
patch
-
git.kernel.org
/stable/c/8ee931c3cd97f1c42b4fbf057f04b9dae45dfb7a
patch
-
git.kernel.org
/stable/c/139c750bf06649097d98b0bc41e2a678b4627e27
patch
-
git.kernel.org
/stable/c/f125846ee79fcae537a964ce66494e96fa54a6de
patch
- cert-portal.siemens.com /productcert/html/ssa-082556.html
- cert-portal.siemens.com /productcert/html/ssa-019113.html
- cert-portal.siemens.com /productcert/html/ssa-457936.html
Sources
- CVE List CVE-2026-31634
- NVD CVE-2026-31634
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.