CVE-2025-21745

MEDIUM EPSS 11.5%
Published Feb 27, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 27, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @block_class's subsystem refcount leakage blkcg_fill_root_iostats() iterates over @block_class's devices by class_dev_iter_(init|next)(), but does not end iterating with class_dev_iter_exit(), so causes the class's subsystem refcount leakage. Fix by ending the iterating with class_dev_iter_exit().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
11.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <6.1.129
linuxlinux_kernel*≥6.2  –  <6.6.78
linuxlinux_kernel*≥6.7  –  <6.12.14
linuxlinux_kernel*≥6.13  –  <6.13.3

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • git.kernel.org https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88be
  • git.kernel.org https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafb
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e
    Patch