CVE-2025-38089

Advisory lineage Upstream: 0 Downstream: 90
Analyzed
Published: 30 Jun 2025, 07:29
Last modified:23 May 2026, 15:58

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.05% LOW
0% probability +0.03%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

30 Jun 2025, 07:29
Published
Vulnerability first disclosed
23 May 2026, 15:58
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.05%• Percentile: 16%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • linux•linux

    ≥ 29cd2927fb914cc53b5ba4f67d2b74695c994ba4, < 599c489eea793821232a2f69a00fa57d82b0ac98 | ≥ 29cd2927fb914cc53b5ba4f67d2b74695c994ba4, < 353e75b55e583635bf71cde6abcec274dba05edd | ≥ 29cd2927fb914cc53b5ba4f67d2b74695c994ba4, < c90459cd58bb421d275337093d8e901e0ba748dd | ≥ 29cd2927fb914cc53b5ba4f67d2b74695c994ba4, < 94d10a4dba0bc482f2b01e39f06d5513d0f75742 | 9b59f5c4911e87264507e0934cd2bb277390c560 | ≥ 6.3.4, < 6.4 | 6.4

  • linux•linux_kernel

    ≥ 6.3.4, < 6.4 | ≥ 6.4.1, < 6.6.95 | ≥ 6.7, < 6.12.35 | ≥ 6.13, < 6.15.4 | 6.4 | 6.4:rc3 | 6.4:rc4 | 6.4:rc5 | 6.4:rc6 | 6.4:rc7 | 6.16:rc1 | 6.16:rc2

References (7)