SUNRPC: Fix null pointer dereference in svc_rqst_free()

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Summary

CVECVE-2021-47002
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-02-28 09:15:38 UTC
Updated2026-05-12 10:16:36 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check. Addresses-Coverity: ("Dereference after null check")

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 79e4e0d489c8e72b9efa388e504a036eec1550c6 3de81c1e84bf84803308da3272a829a7655c5336 git Not specified
CNA Linux Linux affected 5191955d6fc65e6d4efe8f4f10a6028298f57281 1e10f58f1c9a6b667b045513c7a4e6111c24fe7c git Not specified
CNA Linux Linux affected 5191955d6fc65e6d4efe8f4f10a6028298f57281 c664aaec9aee544538a78ba4893a44bc73a6d742 git Not specified
CNA Linux Linux affected 5191955d6fc65e6d4efe8f4f10a6028298f57281 b9f83ffaa0c096b4c832a43964fe6bff3acffe10 git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 5.10.221 5.10.* semver Not specified
CNA Linux Linux unaffected 5.11.22 5.11.* semver Not specified
CNA Linux Linux unaffected 5.12.5 5.12.* semver Not specified
CNA Linux Linux unaffected 5.13 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b9f83ffaa0c096b4c832a43964fe6bff3acffe10 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/c664aaec9aee544538a78ba4893a44bc73a6d742 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/1e10f58f1c9a6b667b045513c7a4e6111c24fe7c af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/3de81c1e84bf84803308da3272a829a7655c5336 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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