sunrpc: handle SVC_GARBAGE during svc auth processing as auth error (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.55 % · percentile 46 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-476 — NULL Pointer Dereference
References
- https://git.kernel.org/stable/c/599c489eea793821232a2f69a00fa57d82b0ac98
- https://git.kernel.org/stable/c/353e75b55e583635bf71cde6abcec274dba05edd
- https://git.kernel.org/stable/c/c90459cd58bb421d275337093d8e901e0ba748dd
- https://git.kernel.org/stable/c/94d10a4dba0bc482f2b01e39f06d5513d0f75742
- https://www.openwall.com/lists/oss-security/2025/07/02/2
- https://github.com/keymaker-arch/NFSundown
- http://www.openwall.com/lists/oss-security/2025/07/02/2
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-19770
- GCVE · GCVE-0-2025-38089
CERT-FR advisories
- CERTFR-2026-AVI-0249 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0246 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0227 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0194 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0169 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1073 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0977 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0949 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0922 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0860 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0759 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0745 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0723 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0648 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0626 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.3.4 < 6.4cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.4.1 < 6.6.95cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.35cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.15.4cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 < 599c489eea793821232a2f69a00fa57d82b0ac98 ; affected 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 < 353e75b55e583635bf71cde6abcec274dba05edd ; affected 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 < c90459cd58bb421d275337093d8e901e0ba748dd ; affected 29cd2927fb914cc53b5ba4f67d2b74695c994ba4 < 94d10a4dba0bc482f2b01e39f06d5513d0f75742 ; affected 9b59f5c4911e87264507e0934cd2bb277390c560 ; affected 6.3.4 < 6.4 |
| Linux · Linux | affected 6.4 ; unaffected 0 < 6.4 ; unaffected 6.6.95 ≤ 6.6.* ; unaffected 6.12.35 ≤ 6.12.* ; unaffected 6.15.4 ≤ 6.15.* ; unaffected 6.16 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |