SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-71120
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-14 15:16:01 UTC
Updated2026-07-14 13:18:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf A zero length gss_token results in pages == 0 and in_token->pages[0] is NULL. The code unconditionally evaluates page_address(in_token->pages[0]) for the initial memcpy, which can dereference NULL even when the copy length is 0. Guard the first memcpy so it only runs when length > 0.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 a8f1e445ce3545c90d69c9e8ff8f7821825fe810 git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 f9e53f69ac3bc4ef568b08d3542edac02e83fefd git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 7452d53f293379e2c38cfa8ad0694aa46fc4788b git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 a2c6f25ab98b423f99ccd94874d655b8bcb01a19 git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 1c8bb965e9b0559ff0f5690615a527c30f651dd8 git Not specified
CNA Linux Linux affected 5866efa8cbfbadf3905072798e96652faf02dbe8 d4b69a6186b215d2dc1ebcab965ed88e8d41768d git Not specified
CNA Linux Linux affected 66ed7b413d31c6ff23901ac4443b1cc1af2f6113 git Not specified
CNA Linux Linux affected 7be8c165dc81564705e8e0b72d398ef708f67eaa git Not specified
CNA Linux Linux affected 4.19.99 4.20 semver Not specified
CNA Linux Linux affected 5.4.15 5.5 semver Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.248 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.198 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.160 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.120 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.64 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.3 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.6 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.6 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7452d53f293379e2c38cfa8ad0694aa46fc4788b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f9e53f69ac3bc4ef568b08d3542edac02e83fefd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d4b69a6186b215d2dc1ebcab965ed88e8d41768d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-019113.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/4dedb6a11243a5c9eb9dbb97bca3c98bd725e83d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1c8bb965e9b0559ff0f5690615a527c30f651dd8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a2c6f25ab98b423f99ccd94874d655b8bcb01a19 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a8f1e445ce3545c90d69c9e8ff8f7821825fe810 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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