Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — sunrpc: handle SVC_GARBAGE during svc auth processing as auth error
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0048 39.6 —
AFFECTED
Product Versions Fixed
Linux 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 – —
Linux 6.4 – 6.6.95
TIMELINE
Apr 16 Reserved by Linux
Jun 30 Published (CNA: Linux)
Jul 30 EXPLOIT PUBLISHED — CVE-2025-38089 (Linux). Public exploit reference added.
Jul 30 RESCORED — CVE-2025-38089 (Linux). CVSS 9.8 → 5.5 (NVD).
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.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| April 16, 2025 | Reserved | Reserved by Linux |
| June 30, 2025 | Published | Published (CNA: Linux) |
| July 30, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2025-38089 (Linux). Public exploit reference added. |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-38089 (Linux). CVSS 9.8 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Linux | Linux | — | 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 | — |
| Linux | Linux | — | 6.4 | 6.6.95 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-38089 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.