01 Record

CVE-2025-21745

blk-cgroup: Fix class @block_class's subsystem refcount leakage

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

blk-cgroup: Fix class @block_class's subsystem refcount leakage

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.25% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 16.4% of scored records. A rank, not a probability.
NVD base score: 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-07-14.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-02-27 02:12Z1 YR AGO

Last updated

2026-07-14 12:39Z1 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.2

Document digest

481ccf9dcea8915b678a1a5fda2308dee85595a69134b990b6d0fbce5636016f

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxef45fe470e1e5410db4af87abc5d5055427945ac to < ffb494f1e7a047bd7a41b13796fcfb08fe5beafb, ef45fe470e1e5410db4af87abc5d5055427945ac to < 38287f779b34dfe959b4b681e909f2d3d52b88be, ef45fe470e1e5410db4af87abc5d5055427945ac to < 431b6ef2714be4d5babb802114987541a88b43b0, ef45fe470e1e5410db4af87abc5d5055427945ac to < 993121481b5a87829f1e8163f47158b72679f309, ef45fe470e1e5410db4af87abc5d5055427945ac to < 2ce09aabe009453d641a2ceb79e6461a2d4f3876, ef45fe470e1e5410db4af87abc5d5055427945ac to < 67c7f213e052b1aa6caba4a7e25e303bc6997126, ef45fe470e1e5410db4af87abc5d5055427945ac to < d1248436cbef1f924c04255367ff4845ccd9025e, 5.9—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafb
git.kernel.orghttps://git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88be
git.kernel.orghttps://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0
git.kernel.orghttps://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309
git.kernel.orghttps://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876
git.kernel.orghttps://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126
git.kernel.orghttps://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-265688.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html

01 Record index

CVE-2025-21745

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21745

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References