ipc: fix to protect IPCS lookups using RCU (Linux Linux)

CVE-2025-38212
HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.20 % · percentile 10 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In 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/67af13f8.050a0220.21dd3.0038.GAE@google.com/ 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().

Weaknesses (CWE)

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected b34a6b1da371ed8af1221459a18c67970f7e3d53 < 5f1e1573bf103303944fd7225559de5d8297539c ; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 < b968ba8bfd9f90914957bbbd815413bf6a98eca7 ; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 < 74bc813d11c30e28fc5261dc877cca662ccfac68 ; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 < 78297d53d3878d43c1d627d20cd09f611fa4b91d ; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 < 5180561afff8e0f029073c8c8117c95c6512d1f9 ; affected b34a6b1da371ed8af1221459a18c67970f7e3d53 < 68c173ea138b66d7dd1fd980c9bc578a18e11884
Linux · Linuxaffected 3.1 ; unaffected 0 < 3.1 ; unaffected 5.4.295 ≤ 5.4.* ; unaffected 5.10.239 ≤ 5.10.* ; unaffected 5.15.186 ≤ 5.15.* ; unaffected 6.1.142 ≤ 6.1.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD