cbcvebase.
CVE-2025-21745
published 2025-02-27

CVE-2025-21745: In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @block_class's subsystem refcount leakage blkcg_fill_root_iostats()…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.5th percentile
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().

Affected

24 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
debianlinux-6.1< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
linuxlinux
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < ffb494f1e7a047bd7a41b13796fcfb08fe5beafbffb494f1e7a047bd7a41b13796fcfb08fe5beafb
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < 38287f779b34dfe959b4b681e909f2d3d52b88be38287f779b34dfe959b4b681e909f2d3d52b88be
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < 431b6ef2714be4d5babb802114987541a88b43b0431b6ef2714be4d5babb802114987541a88b43b0
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < 993121481b5a87829f1e8163f47158b72679f309993121481b5a87829f1e8163f47158b72679f309
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < 2ce09aabe009453d641a2ceb79e6461a2d4f38762ce09aabe009453d641a2ceb79e6461a2d4f3876
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < 67c7f213e052b1aa6caba4a7e25e303bc699712667c7f213e052b1aa6caba4a7e25e303bc6997126
linuxlinux>= ef45fe470e1e5410db4af87abc5d5055427945ac < d1248436cbef1f924c04255367ff4845ccd9025ed1248436cbef1f924c04255367ff4845ccd9025e
linuxlinux_kernel>= 0 < 5.10.237-15.10.237-1
linuxlinux_kernel>= 0 < 6.1.129-16.1.129-1
linuxlinux_kernel>= 0 < 6.12.15-16.12.15-1
linuxlinux_kernel>= 0 < 6.12.15-16.12.15-1
linuxlinux_kernel>= 0 < 5.15.0-140.1505.15.0-140.150
linuxlinux_kernel>= 0 < 6.8.0-64.676.8.0-64.67
linuxlinux_kernel>= 5.9 < 6.1.1296.1.129
linuxlinux_kernel>= 6.13 < 6.13.36.13.3
linuxlinux_kernel>= 6.2 < 6.6.786.6.78
linuxlinux_kernel>= 6.7 < 6.12.146.12.14
msrcazl3_kernel_6.6.64.2-9_on_azure_linux_3.0
msrcazl3_kernel_6.6.78.1-3_on_azure_linux_3.0
msrccbl2_kernel_5.15.179.1-1_on_cbl_mariner_2.0
msrccbl2_kernel_5.15.182.1-1_on_cbl_mariner_2.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.