CVE-2025-38212 | ipc: fix to protect IPCS lookups using RCU

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/[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().

Published: 2025-07-04 Last update: 2026-05-12 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-38212 is rated Low Risk (39.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.08%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-38212

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-30 0.02% 0.08% +0.06%
2 2025-12-19 0.05% 0.02% -0.03%
3 2025-10-17 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-38212

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2025-38212

GitHub Security Advisory for CVE-2025-38212

GHSA-6c9x-j9r2-vpw8 · Severity: high — In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS...

OS Trackers for CVE-2025-38212

vendor priority summary link
debian not yet assigned CVE-2025-38212 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. https://security-tracker.debian.org/tracker/CVE-2025-38212
redhat medium — https://access.redhat.com/security/cve/CVE-2025-38212
suse high — https://www.suse.com/security/cve/CVE-2025-38212/
ubuntu medium CVE-2025-38212 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 170, ignored 168, needed 44, not-affected 21, needs-triage 2, pending 1. https://ubuntu.com/security/CVE-2025-38212

Affected software / configurations for CVE-2025-38212

Vendor Product Version Raw CPE
linux linux_kernel >= 3.1, < 5.4.295 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.5, < 5.10.239 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.11, < 5.15.186 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.1.142 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.6.95 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.12.35 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.13, < 6.15.4 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2025-38212

URL Tags
https://git.kernel.org/stable/c/5180561afff8e0f029073c8c8117c95c6512d1f9 Patch
https://git.kernel.org/stable/c/5f1e1573bf103303944fd7225559de5d8297539c Patch
https://git.kernel.org/stable/c/68c173ea138b66d7dd1fd980c9bc578a18e11884 Patch
https://git.kernel.org/stable/c/74bc813d11c30e28fc5261dc877cca662ccfac68 Patch
https://git.kernel.org/stable/c/78297d53d3878d43c1d627d20cd09f611fa4b91d Patch
https://git.kernel.org/stable/c/b0b6bf90ce2699a574b3683e22c44d0dcdd7a057 Patch
https://git.kernel.org/stable/c/b968ba8bfd9f90914957bbbd815413bf6a98eca7 Patch
https://git.kernel.org/stable/c/d66adabe91803ef34a8b90613c81267b5ded1472 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Mailing List Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
cvelogic Threat Intelligence