CVE-2025-38212

Advisory lineage Upstream: 0 Downstream: 143
Modified
Published: 04 Jul 2025, 13:37
Last modified:12 May 2026, 12:04

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.08% LOW
0% probability +0.06%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Jul 2025, 13:37
Published
Vulnerability first disclosed
12 May 2026, 12:04
Last Modified
Vulnerability information updated

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().

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.08%• Percentile: 23%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < 5f1e1573bf103303944fd7225559de5d8297539c | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < b968ba8bfd9f90914957bbbd815413bf6a98eca7 | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < 74bc813d11c30e28fc5261dc877cca662ccfac68 | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < 78297d53d3878d43c1d627d20cd09f611fa4b91d | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < 5180561afff8e0f029073c8c8117c95c6512d1f9 | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < 68c173ea138b66d7dd1fd980c9bc578a18e11884 | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < b0b6bf90ce2699a574b3683e22c44d0dcdd7a057 | ≥ b34a6b1da371ed8af1221459a18c67970f7e3d53, < d66adabe91803ef34a8b90613c81267b5ded1472 | 3.1

  • linux•linux_kernel

    ≥ 3.1, < 5.4.295 | ≥ 5.5, < 5.10.239 | ≥ 5.11, < 5.15.186 | ≥ 5.16, < 6.1.142 | ≥ 6.2, < 6.6.95 | ≥ 6.7, < 6.12.35 | ≥ 6.13, < 6.15.4

References (11)