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CVE-2025-38089— sunrpc: handle SVC_GARBAGE during svc auth processing as auth error

Quick assessment

Affected
Linux Linux
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于处理SVC_GARBAGE时未正确设置rq_accept_statp指针，可能导致空指针取消引用或内存损坏。

CVSS 9.8 · Critical EPSS 0.55% · P45

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 29cd2927fb914cc53b5ba4f67d2b74695c994ba4< 599c489eea793821232a2f69a00fa57d82b0ac98 affected
29cd2927fb914cc53b5ba4f67d2b74695c994ba4< 353e75b55e583635bf71cde6abcec274dba05edd affected
29cd2927fb914cc53b5ba4f67d2b74695c994ba4< c90459cd58bb421d275337093d8e901e0ba748dd affected
29cd2927fb914cc53b5ba4f67d2b74695c994ba4< 94d10a4dba0bc482f2b01e39f06d5513d0f75742 affected
9b59f5c4911e87264507e0934cd2bb277390c560 affected
6.3.4< 6.4 affected
6.4 affected
< 6.4 unaffected
… +4 more rows
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I. Basic Information for CVE-2025-38089

Vulnerability Information
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Vulnerability Title
sunrpc: handle SVC_GARBAGE during svc auth processing as auth error
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于处理SVC_GARBAGE时未正确设置rq_accept_statp指针，可能导致空指针取消引用或内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 ~ 599c489eea793821232a2f69a00fa57d82b0ac98 -
Linux Linux 6.4 -

II. Public POCs for CVE-2025-38089

# POC Description Source Link Shenlong Link
1 PoC for CVE-2025-38089 https://github.com/keymaker-arch/NFSundown POC Details
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10210 chars
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III. Intelligence Information for CVE-2025-38089

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Same Patch Batch · Linux · 2025-06-30 · 4 CVEs total

CVE-2025-38090 7.8 HIGH drivers/rapidio/rio_cm.c: prevent possible heap overwrite
CVE-2025-38087 7.8 HIGH net/sched: fix use-after-free in taprio_dev_notifier
CVE-2025-38088 powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38089

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