ipc: fix to protect IPCS lookups using RCU

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38212
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-07-04 14:15:29 UTC
Updated2026-05-12 13:16:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/[email protected]/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

Problem Types: CWE-416

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 b34a6b1da371ed8af1221459a18c67970f7e3d53 5f1e1573bf103303944fd7225559de5d8297539c git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 b968ba8bfd9f90914957bbbd815413bf6a98eca7 git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 74bc813d11c30e28fc5261dc877cca662ccfac68 git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 78297d53d3878d43c1d627d20cd09f611fa4b91d git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 5180561afff8e0f029073c8c8117c95c6512d1f9 git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 68c173ea138b66d7dd1fd980c9bc578a18e11884 git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 b0b6bf90ce2699a574b3683e22c44d0dcdd7a057 git Not specified
CNA Linux Linux affected b34a6b1da371ed8af1221459a18c67970f7e3d53 d66adabe91803ef34a8b90613c81267b5ded1472 git Not specified
CNA Linux Linux affected 3.1 Not specified
CNA Linux Linux unaffected 3.1 semver Not specified
CNA Linux Linux unaffected 5.4.295 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.239 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.186 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.142 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.95 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.35 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.4 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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