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Critical · 9.8 Public exploit CVE-2025-38089 EUVD-2025-19770GHSA-r4mq-hvhp-3h35

sunrpc: handle SVC_GARBAGE during svc auth processing as auth error

Published Jun 30, 2025 · Updated Oct 15, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.14 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.14 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fde-6.8 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-azure-nvidia-6.14 Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.14 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-6.8 Package: linux-intel Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.14 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.14 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.14 Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

sunrpc: handle SVC_GARBAGE during svc auth processing as auth error

tianshuo han reported a remotely-triggerable crash if the client sends a
kernel RPC server a specially crafted packet. If decoding the RPC reply
fails in such a way that SVC_GARBAGE is returned without setting the
rq_accept_statp pointer, then that pointer can be dereferenced and a
value stored there.

If it's the first time the thread has processed an RPC, then that
pointer will be set to NULL and the kernel will crash. In other cases,
it could create a memory scribble.

The server sunrpc code treats a SVC_GARBAGE return from svc_authenticate
or pg_authenticate as if it should send a GARBAGE_ARGS reply. RFC 5531
says that if authentication fails that the RPC should be rejected
instead with a status of AUTH_ERR.

Handle a SVC_GARBAGE return as an AUTH_ERROR, with a reason of
AUTH_BADCRED instead of returning GARBAGE_ARGS in that case. This
sidesteps the whole problem of touching the rpc_accept_statp pointer in
this situation and avoids the crash.

Affected products

VendorProductAffectedFixed
Linux Linux 6.3.4 – < 6.4, 6.4 6.4

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.12.35-1 —
Debian 13 linux 6.12.35-1 —
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 24.04 LTS linux-bluefield 6.8.0-1016.20 —
Ubuntu 25.10 linux-azure-fde No fix yet —
Ubuntu 24.04 LTS linux 6.8.0-100.100 USN-8028-1
Ubuntu 24.04 LTS linux-aws +1 6.8.0-1046.49 USN-8028-5
Ubuntu 24.04 LTS linux-aws-6.14 +1 6.14.0-1015.15~24.04.1 USN-7833-3, USN-7833-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1046.52 USN-8074-1
Ubuntu 24.04 LTS linux-azure-6.14 6.14.0-1014.14~24.04.1 USN-7834-1
Ubuntu 24.04 LTS linux-azure-fde 6.8.0-1046.53 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1039.42 —
Ubuntu 24.04 LTS linux-azure-nvidia-6.14 6.14.0-1007.7 USN-7834-1
Ubuntu 24.04 LTS linux-gcp 6.8.0-1047.50 USN-8031-3
Ubuntu 24.04 LTS linux-gcp-6.14 6.14.0-1018.19~24.04.1 USN-7833-4
Ubuntu 24.04 LTS linux-gke 6.8.0-1043.48 USN-8031-3
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1030.33 USN-8028-5
Ubuntu 24.04 LTS linux-hwe-6.14 6.14.0-34.34~24.04.1 USN-7856-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1044.44 USN-8028-8
Ubuntu 24.04 LTS linux-intel +10 No fix yet —
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-100.100.1 USN-8052-1
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1046.49.1 USN-8028-7
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1020.20 —
Ubuntu 24.04 LTS linux-oem-6.14 6.14.0-1014.14 USN-7833-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1043.44 USN-8028-5
Ubuntu 24.04 LTS linux-raspi 6.8.0-1047.51 USN-8028-1
Ubuntu 24.04 LTS linux-riscv-6.14 6.14.0-34.34.1~24.04.1 —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1023.24 USN-8052-2
Ubuntu 22.04 LTS linux-aws-6.8 +1 6.8.0-1046.49~22.04.1 USN-8028-5
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1051.57~22.04.1 USN-8126-1
Ubuntu 22.04 LTS linux-azure-fde-6.8 6.8.0-1046.53~22.04.1 —
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1047.50~22.04.2 USN-8031-1
Ubuntu 22.04 LTS linux-hwe-6.8 +1 6.8.0-100.100~22.04.1 USN-8028-6
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1044.44~22.04.1 USN-8028-8
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-100.100.1~22.04.1 USN-8028-6
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1043.44~22.04.1 USN-8028-5
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Show 5 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2037.38 USN-8028-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1041.42 USN-8028-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.14 6.14.0-1014.14~24.04.1 USN-7833-2
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1041.42~22.04.1 USN-8028-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-aws-fips 6.8.0-1046.49+fips1 USN-8028-4
Ubuntu Pro FIPS-updates 24.04 LTS linux-azure-fips 6.8.0-1046.52+fips1 USN-8074-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-100.100+fips1 USN-8028-4
Ubuntu Pro FIPS-updates 24.04 LTS linux-gcp-fips 6.8.0-1047.50+fips1 USN-8031-2
ReleasePackageFixed inAdvisory
RHEL 10 rv +77 6.12.0-55.22.1.el10_0 RHSA-2025:11428
RHEL 9 kpatch-patch-5_14_0-570_17_1 1-5.el9_6 RHSA-2025:12976
RHEL 9 rv +77 5.14.0-570.28.1.el9_6 RHSA-2025:11411
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.79.1.el9_4 RHSA-2025:11810
RHEL 9.4 EUS kpatch-patch-5_14_0-427_13_1 1-11.el9_4 RHSA-2025:12977
RHEL 9.4 EUS kpatch-patch-5_14_0-427_31_1 1-9.el9_4 RHSA-2025:12977
RHEL 9.4 EUS kpatch-patch-5_14_0-427_44_1 1-7.el9_4 RHSA-2025:12977
RHEL 9.4 EUS kpatch-patch-5_14_0-427_55_1 1-5.el9_4 RHSA-2025:12977
RHEL 9.4 EUS kpatch-patch-5_14_0-427_68_2 1-2.el9_4 RHSA-2025:12977
RHEL 9.4 EUS rv +64 5.14.0-427.79.1.el9_4 RHSA-2025:11810

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 kernel-doc +1 6.12.0-55.22.1.el10_0 ALSA-2025:11428
AlmaLinux 9 rv +75 5.14.0-570.28.1.el9_6 ALSA-2025:11411

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 kernel 6.12.0-55.22.1.el10_0 RLSA-2025:11428
Rocky Linux 9 kernel 5.14.0-570.28.1.el9_6 RLSA-2025:11411
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +5 6.4.0-150700.53.11.1 SUSE-SU-2025:02997-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.11.1 SUSE-SU-2025:03011-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.11.1.150700.17.9.4 SUSE-SU-2025:02997-1
SLES 15 SP7 kernel-docs 6.4.0-150700.53.11.3 SUSE-SU-2025:02997-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.65.1 SUSE-SU-2025:02996-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.48.1 SUSE-SU-2025:02969-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.28.coco15sp6.1 SUSE-SU-2025:02923-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.65.1.150600.12.28.4 SUSE-SU-2025:02996-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 kernel-64kb +7 6.12.0-160000.6.1 SUSE-SU-2025:21139-1
SLES for SAP 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21139-1
SLES 16.0 kernel-64kb +7 6.12.0-160000.6.1 SUSE-SU-2025:21179-1, SUSE-SU-2025:21139-1
SLES 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21139-1
SLE Micro 6.2 kernel-default-base 6.12.0-160000.6.1.160000.2.4 SUSE-SU-2025:21074-1
SLE Micro 6.2 kernel-rt +5 6.12.0-160000.6.1 SUSE-SU-2026:20560-1, SUSE-SU-2025:21074-1
SLE Micro 6.1 kernel-default-base 6.4.0-32.1.21.10 SUSE-SU-2025:20602-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_4 10-1.1 SUSE-SU-2025:20813-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_5 9-1.1 SUSE-SU-2025:20814-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_7 7-1.3 SUSE-SU-2025:20816-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_9 5-1.2 SUSE-SU-2025:20818-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_2 +1 13-1.1 SUSE-SU-2025:20819-1, SUSE-SU-2025:20806-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_4 11-1.2 SUSE-SU-2025:20807-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_5 9-1.2 SUSE-SU-2025:20808-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_6 +1 7-3.1 SUSE-SU-2025:20815-1, SUSE-SU-2025:20809-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_7 +2 6-1.2 SUSE-SU-2025:20817-1, SUSE-SU-2025:20811-1, SUSE-SU-2025:20810-1
SLE Micro 6.1 kernel-rt +1 6.4.0-35.1 SUSE-SU-2025:20601-1
SLE Micro 6.1 kernel-source +2 6.4.0-32.1 SUSE-SU-2025:20602-1
SLE Micro 6.0 kernel-default-base 6.4.0-32.1.21.10 SUSE-SU-2025:20586-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_4 10-1.1 SUSE-SU-2025:20826-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_5 9-1.1 SUSE-SU-2025:20827-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_7 7-1.3 SUSE-SU-2025:20829-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_9 5-1.2 SUSE-SU-2025:20831-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_2 +1 13-1.1 SUSE-SU-2025:20840-1, SUSE-SU-2025:20832-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_3 +1 13-1.2 SUSE-SU-2025:20841-1, SUSE-SU-2025:20833-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_4 11-1.2 SUSE-SU-2025:20834-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_5 9-1.2 SUSE-SU-2025:20835-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_6 +1 7-3.1 SUSE-SU-2025:20836-1, SUSE-SU-2025:20828-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_7 +2 6-1.2 SUSE-SU-2025:20838-1, SUSE-SU-2025:20837-1, SUSE-SU-2025:20830-1
SLE Micro 6.0 kernel-rt +1 6.4.0-35.1 SUSE-SU-2025:20577-1
SLE Micro 6.0 kernel-source +2 6.4.0-32.1 SUSE-SU-2025:20586-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.11.1 SUSE-SU-2025:02997-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_0 5-150700.3.1 SUSE-SU-2025:03480-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_3 1-150700.1.5.1 SUSE-SU-2025:02853-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_0 5-150700.3.12.2 SUSE-SU-2025:03575-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_1 5-150700.2.1 SUSE-SU-2025:03572-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_3 1-150700.15.3.4 SUSE-SU-2025:02997-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.65.1 SUSE-SU-2025:02996-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_14 1-150600.1.5.1 SUSE-SU-2025:03023-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_4 17-150600.2.1 SUSE-SU-2025:03468-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_10 +1 7-150600.2.1 SUSE-SU-2025:03572-1, SUSE-SU-2025:03495-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_12 +1 6-150600.2.1 SUSE-SU-2025:03567-1, SUSE-SU-2025:03470-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_14 1-150600.13.3.4 SUSE-SU-2025:02996-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_4 +2 18-150600.2.1 SUSE-SU-2025:03566-1, SUSE-SU-2025:03494-1, SUSE-SU-2025:03465-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_6 +3 13-150600.2.1 SUSE-SU-2025:03571-1, SUSE-SU-2025:03569-1, SUSE-SU-2025:03472-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_9 +1 8-150600.2.1 SUSE-SU-2025:03563-1, SUSE-SU-2025:03476-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.13.1 SUSE-SU-2025:02853-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.49.1 SUSE-SU-2025:03023-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 kernel-default-base 6.12.0-160000.6.1.160000.2.4 openSUSE-SU-2025:20081-1
openSUSE Leap 16.0 kernel-rt +10 6.12.0-160000.6.1 openSUSE-SU-2025:20081-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.65.1 SUSE-SU-2025:02996-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.48.1 SUSE-SU-2025:02969-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.65.1.150600.12.28.4 SUSE-SU-2025:02996-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.49.1 SUSE-SU-2025:03023-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 bpftool +14 6.12.35-55.103.amzn2023 ALAS2023-2025-1080
Amazon Linux 2023 kernel-livepatch-6.12.35-55.103 1.0-0.amzn2023 ALAS2023-2025-1080

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 kernel 6.6.96.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 rv +28 6.12.0-55.22.1.0.1.el10_0 ELSA-2025-11428
Oracle Linux 9 kernel-uek +34 6.12.0-101.33.4.3.el10uek ELSA-2025-20530, ELSA-2025-20480
Oracle Linux 9 rv +28 5.14.0-570.28.1.0.1.el9_6 ELSA-2025-11411
Oracle Linux 8 bpftool +18 5.15.0-310.184.5.2.el9uek ELSA-2025-20520, ELSA-2025-20470

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 50

References