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Fencer Vulns
medium 5.5

CVE-2025-22026 json

nfsd: don't ignore the return code of svc_proc_register()

published 2025-04-16 18 mo ago modified 2026-06-19 4 mo ago also EUVD-2025-11263

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

nfsd: don't ignore the return code of svc_proc_register()

Currently, nfsd_proc_stat_init() ignores the return value of svc_proc_register(). If the procfile creation fails, then the kernel will WARN when it tries to remove the entry later.

Fix nfsd_proc_stat_init() to return the same type of pointer as svc_proc_register(), and fix up nfsd_net_init() to check that and fail the nfsd_net construction if it occurs.

svc_proc_register() can fail if the dentry can't be allocated, or if an identical dentry already exists. The second case is pretty unlikely in the nfsd_net construction codepath, so if this happens, return -ENOMEM.

Patch / fix

  • Linux Linux 5.10.259, 5.15.210, 6.1.164, 6.6.125, 6.9, 6.12.24, 6.13.12, 6.14.2, 6.15
  • linux Debian 12 6.1.164-1
  • linux Debian 14, Debian 13 6.12.25-1

debian advisories DEBIAN-CVE-2025-22026

  • linux Ubuntu 22.04 LTS 5.15.0-198.208
  • linux Ubuntu 24.04 LTS 6.8.0-100.100
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1046.49
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1047.50
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1113.119
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1043.48

ubuntu advisories UBUNTU-CVE-2025-22026

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

  • kernel RHEL 9 5.14.0-570.55.1.el9_6
  • rv RHEL 9 5.14.0-570.55.1.el9_6
  • perf RHEL 9 5.14.0-570.55.1.el9_6
  • rtla RHEL 9 5.14.0-570.55.1.el9_6
  • libperf RHEL 9 5.14.0-570.55.1.el9_6
  • kernel-rt RHEL 9 5.14.0-570.55.1.el9_6
  • kernel-64k RHEL 9 5.14.0-570.55.1.el9_6
  • kernel-core RHEL 9 5.14.0-570.55.1.el9_6

red hat advisories RHSA-2025:22752RHSA-2025:21667RHSA-2025:21082RHSA-2025:21063RHSA-2025:19222RHSA-2025:18932

  • kernel AlmaLinux 9 5.14.0-570.55.1.el9_6
  • rv AlmaLinux 9 5.14.0-570.55.1.el9_6
  • perf AlmaLinux 9 5.14.0-570.55.1.el9_6
  • rtla AlmaLinux 9 5.14.0-570.55.1.el9_6
  • libperf AlmaLinux 9 5.14.0-570.55.1.el9_6
  • kernel-rt AlmaLinux 9 5.14.0-570.55.1.el9_6
  • kernel-64k AlmaLinux 9 5.14.0-570.55.1.el9_6
  • kernel-core AlmaLinux 9 5.14.0-570.55.1.el9_6

almalinux advisories ALSA-2025:18281ALSA-2025:17396ALSA-2025:16919ALSA-2025:16920

  • kernel-rt Rocky Linux 8 4.18.0-553.77.1.rt7.418.el8_10
  • kernel Rocky Linux 8 4.18.0-553.77.1.el8_10

rocky linux advisories RLSA-2025:16920RLSA-2025:16919

  • kernel Azure Linux 3.0 6.6.126.1-1

azure linux advisories AZL-62735

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2025-22026 updated cvss 7.1

kernel: nfsd: don't ignore the return code of svc_proc_register()

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.83.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.83.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.83.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.83.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.83.1.el9_4
    fixed: vendor fix RHSA-2025:13946
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-570.55.1.el9_6, perf 5.14.0-570.55.1.el9_6, rtla 5.14.0-570.55.1.el9_6, python3-perf 5.14.0-570.55.1.el9_6, kernel-devel-matched 5.14.0-570.55.1.el9_6, kernel-64k-devel-matched 5.14.0-570.55.1.el9_6, +7 more
    fixed: vendor fix RHSA-2025:18281
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-55.38.1.el10_0, perf 6.12.0-55.38.1.el10_0, rtla 6.12.0-55.38.1.el10_0, python3-perf 6.12.0-55.38.1.el10_0, kernel-devel-matched 6.12.0-55.38.1.el10_0, kernel-64k-devel-matched 6.12.0-55.38.1.el10_0, +7 more
    fixed: vendor fix RHSA-2025:17396
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.144.1.el9_0, kernel-devel-matched 5.14.0-70.144.1.el9_0, kernel-debug-devel-matched 5.14.0-70.144.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.144.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.144.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.144.1.el9_0, +2 more
    fixed: vendor fix RHSA-2025:14744
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.131.1.el9_2, rtla 5.14.0-284.131.1.el9_2, kernel-devel-matched 5.14.0-284.131.1.el9_2, kernel-64k-devel-matched 5.14.0-284.131.1.el9_2, kernel-debug-devel-matched 5.14.0-284.131.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.131.1.el9_2, +5 more
    fixed: vendor fix RHSA-2025:14003
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.83.1.el9_4, perf 5.14.0-427.83.1.el9_4, rtla 5.14.0-427.83.1.el9_4, kernel-devel-matched 5.14.0-427.83.1.el9_4, kernel-64k-devel-matched 5.14.0-427.83.1.el9_4, kernel-debug-devel-matched 5.14.0-427.83.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:13946
show 30 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.77.1.el8_10, kernel 4.18.0-553.77.1.el8_10, bpftool 4.18.0-553.77.1.el8_10, kernel-core 4.18.0-553.77.1.el8_10, kernel-tools 4.18.0-553.77.1.el8_10, python3-perf 4.18.0-553.77.1.el8_10, +15 more
    fixed: vendor fix RHSA-2025:16919
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-570.55.1.el9_6, kernel-64k 5.14.0-570.55.1.el9_6, kernel-core 5.14.0-570.55.1.el9_6, kernel-tools 5.14.0-570.55.1.el9_6, kernel-modules 5.14.0-570.55.1.el9_6, kernel-64k-core 5.14.0-570.55.1.el9_6, +27 more
    fixed: vendor fix RHSA-2025:18281
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-55.38.1.el10_0, kernel-64k 6.12.0-55.38.1.el10_0, kernel-core 6.12.0-55.38.1.el10_0, kernel-tools 6.12.0-55.38.1.el10_0, kernel-modules 6.12.0-55.38.1.el10_0, kernel-64k-core 6.12.0-55.38.1.el10_0, +27 more
    fixed: vendor fix RHSA-2025:17396
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.173.1.el8_2, kernel 4.18.0-193.173.1.el8_2, bpftool 4.18.0-193.173.1.el8_2, kernel-core 4.18.0-193.173.1.el8_2, kernel-tools 4.18.0-193.173.1.el8_2, python3-perf 4.18.0-193.173.1.el8_2, +8 more
    fixed: vendor fix RHSA-2025:21667
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.179.1.el8_4, kernel 4.18.0-305.179.1.el8_4, bpftool 4.18.0-305.179.1.el8_4, kernel-core 4.18.0-305.179.1.el8_4, kernel-tools 4.18.0-305.179.1.el8_4, python3-perf 4.18.0-305.179.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:22752
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.166.1.el8_6, kernel 4.18.0-372.166.1.el8_6, bpftool 4.18.0-372.166.1.el8_6, kernel-core 4.18.0-372.166.1.el8_6, kernel-tools 4.18.0-372.166.1.el8_6, python3-perf 4.18.0-372.166.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.166.1.el8_6, kernel 4.18.0-372.166.1.el8_6, bpftool 4.18.0-372.166.1.el8_6, kernel-core 4.18.0-372.166.1.el8_6, kernel-tools 4.18.0-372.166.1.el8_6, python3-perf 4.18.0-372.166.1.el8_6, +15 more
    fixed: vendor fix RHSA-2025:19222
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.116.1.el8_8, kernel 4.18.0-477.116.1.el8_8, bpftool 4.18.0-477.116.1.el8_8, kernel-core 4.18.0-477.116.1.el8_8, kernel-tools 4.18.0-477.116.1.el8_8, python3-perf 4.18.0-477.116.1.el8_8, +9 more
    fixed: vendor fix RHSA-2025:18932
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.144.1.el9_0, bpftool 5.14.0-70.144.1.el9_0, kernel-core 5.14.0-70.144.1.el9_0, kernel-tools 5.14.0-70.144.1.el9_0, python3-perf 5.14.0-70.144.1.el9_0, kernel-modules 5.14.0-70.144.1.el9_0, +14 more
    fixed: vendor fix RHSA-2025:14744
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.131.1.el9_2, kernel 5.14.0-284.131.1.el9_2, kernel-64k 5.14.0-284.131.1.el9_2, kernel-core 5.14.0-284.131.1.el9_2, kernel-tools 5.14.0-284.131.1.el9_2, python3-perf 5.14.0-284.131.1.el9_2, +28 more
    fixed: vendor fix RHSA-2025:14003
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.83.1.el9_4, kernel 5.14.0-427.83.1.el9_4, kernel-64k 5.14.0-427.83.1.el9_4, kernel-core 5.14.0-427.83.1.el9_4, kernel-tools 5.14.0-427.83.1.el9_4, python3-perf 5.14.0-427.83.1.el9_4, +28 more
    fixed: vendor fix RHSA-2025:13946
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.179.1.el8_4, kernel 4.18.0-305.179.1.el8_4, bpftool 4.18.0-305.179.1.el8_4, kernel-core 4.18.0-305.179.1.el8_4, kernel-tools 4.18.0-305.179.1.el8_4, python3-perf 4.18.0-305.179.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:22752
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.166.1.el8_6, kernel 4.18.0-372.166.1.el8_6, bpftool 4.18.0-372.166.1.el8_6, kernel-core 4.18.0-372.166.1.el8_6, kernel-tools 4.18.0-372.166.1.el8_6, python3-perf 4.18.0-372.166.1.el8_6, +8 more
    fixed: vendor fix RHSA-2025:19222
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.116.1.el8_8, kernel 4.18.0-477.116.1.el8_8, bpftool 4.18.0-477.116.1.el8_8, kernel-core 4.18.0-477.116.1.el8_8, kernel-tools 4.18.0-477.116.1.el8_8, python3-perf 4.18.0-477.116.1.el8_8, +8 more
    fixed: vendor fix RHSA-2025:18932
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-570.55.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.55.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.55.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.55.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.55.1.el9_6
    fixed: vendor fix RHSA-2025:18281
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-55.38.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.38.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.38.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.38.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.38.1.el10_0
    fixed: vendor fix RHSA-2025:17396
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.77.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.77.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.77.1.el8_10
    fixed: vendor fix RHSA-2025:16919
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.142.1.rt56.1294.el7, kernel-rt-trace 3.10.0-1160.142.1.rt56.1294.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.142.1.rt56.1294.el7
    fixed: vendor fix RHSA-2025:21082
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-kvm 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-core 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-modules 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-debug-kvm 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-debug-core 4.18.0-553.77.1.rt7.418.el8_10, +4 more
    fixed: vendor fix RHSA-2025:16920
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-kvm 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-core 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-modules 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-debug-kvm 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-debug-core 5.14.0-70.144.1.rt21.216.el9_0, +4 more
    fixed: vendor fix RHSA-2025:14749
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-570.55.1.el9_6, kernel-rt-64k 5.14.0-570.55.1.el9_6, kernel-rt-core 5.14.0-570.55.1.el9_6, kernel-rt-modules 5.14.0-570.55.1.el9_6, kernel-rt-64k-core 5.14.0-570.55.1.el9_6, kernel-rt-debug-core 5.14.0-570.55.1.el9_6, +14 more
    fixed: vendor fix RHSA-2025:18281
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-55.38.1.el10_0, kernel-rt-64k 6.12.0-55.38.1.el10_0, kernel-rt-core 6.12.0-55.38.1.el10_0, kernel-rt-modules 6.12.0-55.38.1.el10_0, kernel-rt-64k-core 6.12.0-55.38.1.el10_0, kernel-rt-debug-core 6.12.0-55.38.1.el10_0, +14 more
    fixed: vendor fix RHSA-2025:17396
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-core 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-modules 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-debug-core 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-debug-modules 5.14.0-70.144.1.rt21.216.el9_0, kernel-rt-modules-extra 5.14.0-70.144.1.rt21.216.el9_0, +2 more
    fixed: vendor fix RHSA-2025:14749
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-core 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-modules 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-debug-core 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-modules-core 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-debug-modules 5.14.0-284.131.1.rt14.416.el9_2, +4 more
    fixed: vendor fix RHSA-2025:14005
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.83.1.el9_4, kernel-rt-core 5.14.0-427.83.1.el9_4, kernel-rt-modules 5.14.0-427.83.1.el9_4, kernel-rt-debug-core 5.14.0-427.83.1.el9_4, kernel-rt-modules-core 5.14.0-427.83.1.el9_4, kernel-rt-debug-modules 5.14.0-427.83.1.el9_4, +4 more
    fixed: vendor fix RHSA-2025:13946
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-570.55.1.el9_6, kernel-rt-kvm 5.14.0-570.55.1.el9_6, kernel-rt-core 5.14.0-570.55.1.el9_6, kernel-rt-modules 5.14.0-570.55.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.55.1.el9_6, kernel-rt-debug-core 5.14.0-570.55.1.el9_6, +6 more
    fixed: vendor fix RHSA-2025:18281
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-55.38.1.el10_0, kernel-rt-kvm 6.12.0-55.38.1.el10_0, kernel-rt-core 6.12.0-55.38.1.el10_0, kernel-rt-modules 6.12.0-55.38.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.38.1.el10_0, kernel-rt-debug-core 6.12.0-55.38.1.el10_0, +6 more
    fixed: vendor fix RHSA-2025:17396
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-kvm 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-core 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-modules 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-debug-kvm 5.14.0-284.131.1.rt14.416.el9_2, kernel-rt-debug-core 5.14.0-284.131.1.rt14.416.el9_2, +6 more
    fixed: vendor fix RHSA-2025:14005
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.83.1.el9_4, kernel-rt-kvm 5.14.0-427.83.1.el9_4, kernel-rt-core 5.14.0-427.83.1.el9_4, kernel-rt-modules 5.14.0-427.83.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.83.1.el9_4, kernel-rt-debug-core 5.14.0-427.83.1.el9_4, +6 more
    fixed: vendor fix RHSA-2025:13946
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-core 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-modules 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-debug-core 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-debug-modules 4.18.0-553.77.1.rt7.418.el8_10, kernel-rt-modules-extra 4.18.0-553.77.1.rt7.418.el8_10, +2 more
    fixed: vendor fix RHSA-2025:16920
  • Red Hat Enterprise Linux Server (v. 7 ELS) perf 3.10.0-1160.142.1.el7, kernel 3.10.0-1160.142.1.el7, bpftool 3.10.0-1160.142.1.el7, python-perf 3.10.0-1160.142.1.el7, kernel-kdump 3.10.0-1160.142.1.el7, kernel-tools 3.10.0-1160.142.1.el7, +7 more Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debuginfo-common-ppc64 3.10.0-1160.142.1.el7, kernel-debuginfo-common-x86_64 3.10.0-1160.142.1.el7, kernel-debuginfo-common-ppc64le 3.10.0-1160.142.1.el7
    fixed: vendor fix RHSA-2025:21063

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 SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% 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

Classification

Weakness
Technology feeds

References

Sources

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.