CVE-2025-21745— blk-cgroup: Fix class @block_class's subsystem refcount leakage
Affected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ef45fe470e1e5410db4af87abc5d5055427945ac< ffb494f1e7a047bd7a41b13796fcfb08fe5beafb | affected |
ef45fe470e1e5410db4af87abc5d5055427945ac< 38287f779b34dfe959b4b681e909f2d3d52b88be | affected | ||
ef45fe470e1e5410db4af87abc5d5055427945ac< 431b6ef2714be4d5babb802114987541a88b43b0 | affected | ||
ef45fe470e1e5410db4af87abc5d5055427945ac< 993121481b5a87829f1e8163f47158b72679f309 | affected | ||
ef45fe470e1e5410db4af87abc5d5055427945ac< 2ce09aabe009453d641a2ceb79e6461a2d4f3876 | affected | ||
ef45fe470e1e5410db4af87abc5d5055427945ac< 67c7f213e052b1aa6caba4a7e25e303bc6997126 | affected | ||
ef45fe470e1e5410db4af87abc5d5055427945ac< d1248436cbef1f924c04255367ff4845ccd9025e | affected | ||
5.9 | affected | ||
| … +8 more rows | |||
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I. Basic Information for CVE-2025-21745
Vulnerability Information
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Vulnerability Title
blk-cgroup: Fix class @block_class's subsystem refcount leakage
Source: NVD (National Vulnerability Database)
Vulnerability 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().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于blk-cgroup中未正确结束设备迭代，导致子系统引用计数泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-21745
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total
| CVE-2025-21756 | 7.8 HIGH | vsock: Keep the binding until socket destruction |
| CVE-2025-21773 | can: etas_es58x: fix potential NULL pointer dereference on udev->serial | |
| CVE-2025-21763 | neighbour: use RCU protection in __neigh_notify() | |
| CVE-2025-21762 | arp: use RCU protection in arp_xmit() | |
| CVE-2025-21764 | ndisc: use RCU protection in ndisc_alloc_skb() | |
| CVE-2025-21765 | ipv6: use RCU protection in ip6_default_advmss() | |
| CVE-2025-21766 | ipv4: use RCU protection in __ip_rt_update_pmtu() | |
| CVE-2025-21767 | clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context | |
| CVE-2025-21769 | ptp: vmclock: Add .owner to vmclock_miscdev_fops | |
| CVE-2025-21768 | net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels | |
| CVE-2025-21771 | sched_ext: Fix incorrect autogroup migration detection | |
| CVE-2025-21770 | iommu: Fix potential memory leak in iopf_queue_remove_device() | |
| CVE-2025-21777 | ring-buffer: Validate the persistent meta data subbuf array | |
| CVE-2025-21783 | gpiolib: Fix crash on error in gpiochip_get_ngpios() | |
| CVE-2025-21781 | batman-adv: fix panic during interface removal | |
| CVE-2025-21780 | drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table() | |
| CVE-2025-21779 | KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel | |
| CVE-2025-21778 | tracing: Do not allow mmap() of persistent ring buffer | |
| CVE-2025-21774 | can: rockchip: rkcanfd_handle_rx_fifo_overflow_int(): bail out if skb cannot be allocated | |
| CVE-2025-21772 | partitions: mac: fix handling of bogus partition table |
Showing top 20 of 177 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
V. Comments for CVE-2025-21745
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