Medium severity5.5NVD Advisory· Published Feb 27, 2025· Updated Jul 14, 2026
CVE-2025-21745
CVE-2025-21745
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().
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
140- osv-coords137 versionspkg:deb/ubuntu/[email protected]?arch=source&distro=oracularpkg:linux/kernelpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:rpm/almalinux/rvpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-coco_debug&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_6&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_6&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_6&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_6&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-source-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-syms-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6
< 6.11.0-1014.15+ 136 more
- (no CPE)range: < 6.11.0-1014.15
- (no CPE)range: >= 5.9.0, < 5.10.235
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 5.14.0-611.5.1.el9_7
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.8.34.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2.150600.12.20.2
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.8.34.2
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.8.34.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.8.34.2
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.23.47.2.150600.12.20.2
- (no CPE)range: < 6.4.0-28.1.21.6
- (no CPE)range: < 6.4.0-28.1.21.6
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-3.1
- (no CPE)range: < 1-150600.1.5.1
- (no CPE)range: < 1-150600.13.5.1
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-150600.23.47.2
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.8.34.2
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-28.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.1
- (no CPE)range: < 6.4.0-150600.8.34.1
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-150600.10.34.1
- (no CPE)range: < 6.4.0-150600.23.47.2
Patches
Vulnerability mechanics
References
12- git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876nvdPatch
- git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0nvdPatch
- git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126nvdPatch
- git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309nvdPatch
- git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025envdPatch
- cert-portal.siemens.com/productcert/html/ssa-019113.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-082556.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-265688.htmlnvd
- git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88benvd
- git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafbnvd
- lists.debian.org/debian-lts-announce/2025/03/msg00028.htmlnvd
- lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlnvd
News mentions
1- Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFPCISA ICS Advisories