CVE-2025-21745
Detail
Modified After Enrichment This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
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().
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Weakness Enumeration
CWE-ID
CWE Name
Source
NVD-CWE-Other
Other
NIST
Change History
8 change records found show changes
CVE Modified by siemens-SADP
7/14/2026 9:17:22 AM
Action
Type
Old Value
New Value
Added
Reference
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
Changed
Affected
[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]}]
Record truncated, showing 2048 of 2074 characters.
View Entire Change Record [{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.6","lessThan":"*","versionType":"custo
CVE Modified by siemens-SADP
6/17/2026 4:44:10 AM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"*","versionType":"custom","status":"affected"}]},{"vendor":"Siemens","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","defaultStatus":"unknown","versions":[{"version":"V3.1.5","lessThan":"*","versionType":"custom","status":"affected"}]}]
CVE Modified by kernel.org
6/17/2026 4:44:10 AM
Action
Type
Old Value
New Value
Added
Affected
Record truncated, showing 2048 of 2205 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["block/blk-cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"ffb494f1e7a047bd7a41b13796fcfb08fe5beafb","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"38287f779b34dfe959b4b681e909f2d3d52b88be","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"431b6ef2714be4d5babb802114987541a88b43b0","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"993121481b5a87829f1e8163f47158b72679f309","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"2ce09aabe009453d641a2ceb79e6461a2d4f3876","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"67c7f213e052b1aa6caba4a7e25e303bc6997126","versionType":"git","status":"affected"},{"version":"ef45fe470e1e5410db4af87abc5d5055427945ac","lessThan":"d1248436cbef1f924c04255367ff4845ccd9025e","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["block/blk-cgroup.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.9","status":"affected"},{"version":"0","lessThan":"5.9","versionType":"semver","status":"unaffected"},{"version":"5.10.235","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.179","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.129","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.78","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.14","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.13.3","lessThanOrEqual":"6.
CVE Modified by siemens-SADP
5/12/2026 9:16:34 AM
Action
Type
Old Value
New Value
Added
Reference
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Added
Reference
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
CVE Modified by CVE
11/03/2025 3:17:14 PM
Action
Type
Old Value
New Value
Added
Reference
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
Added
Reference
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
CVE Modified by kernel.org
3/13/2025 9:15:51 AM
Action
Type
Old Value
New Value
Added
Reference
https://git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88be
Added
Reference
https://git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafb
Initial Analysis by NIST
3/05/2025 1:50:58 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added
CWE
NVD-CWE-Other
Added
CPE Configuration
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 from (excluding) 6.13.3
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 from (excluding) 6.6.78
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 from (excluding) 6.12.14
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.9 from (excluding) 6.1.129
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309 Types: Patch
Added
Reference Type
kernel.org: https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e Types: Patch
New CVE Received from kernel.org
2/26/2025 10:15:15 PM
Action
Type
Old Value
New Value
Added
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().
Added
Reference
https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876
Added
Reference
https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0
Added
Reference
https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126
Added
Reference
https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309
Added
Reference
https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e
Quick Info
CVE Dictionary Entry: CVE-2025-21745 NVD
Published Date: 02/26/2025 NVD
Last Modified: 07/14/2026
Source: kernel.org
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