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CVE-2025-21786— workqueue: Put the pwq after detaching the rescuer from the pool

EPSS 0.01% · P2
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I. Basic Information for CVE-2025-21786

Vulnerability Information
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Vulnerability Title
workqueue: Put the pwq after detaching the rescuer from the pool
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: workqueue: Put the pwq after detaching the rescuer from the pool The commit 68f83057b913("workqueue: Reap workers via kthread_stop() and remove detach_completion") adds code to reap the normal workers but mistakenly does not handle the rescuer and also removes the code waiting for the rescuer in put_unbound_pool(), which caused a use-after-free bug reported by Cheung Wall. To avoid the use-after-free bug, the pool’s reference must be held until the detachment is complete. Therefore, move the code that puts the pwq after detaching the rescuer from the pool.
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 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于未正确处理rescuer的释放，导致释放后重用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 68f83057b913467a999e1bf9e0da6a119668f769 ~ e7c16028a424dd35be1064a68fa318be4359310f -
LinuxLinux 6.11 -

II. Public POCs for CVE-2025-21786

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III. Intelligence Information for CVE-2025-21786

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Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-217567.8 HIGHvsock: Keep the binding until socket destruction
CVE-2025-21770iommu: Fix potential memory leak in iopf_queue_remove_device()
CVE-2025-21761openvswitch: use RCU protection in ovs_vport_cmd_fill_info()
CVE-2025-21763neighbour: use RCU protection in __neigh_notify()
CVE-2025-21762arp: use RCU protection in arp_xmit()
CVE-2025-21764ndisc: use RCU protection in ndisc_alloc_skb()
CVE-2025-21765ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21766ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21767clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context
CVE-2025-21769ptp: vmclock: Add .owner to vmclock_miscdev_fops
CVE-2025-21768net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels
CVE-2025-21771sched_ext: Fix incorrect autogroup migration detection
CVE-2025-21776USB: hub: Ignore non-compliant devices with too many configs or interfaces
CVE-2025-21781batman-adv: fix panic during interface removal
CVE-2025-21780drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()
CVE-2025-21779KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel
CVE-2025-21778tracing: Do not allow mmap() of persistent ring buffer
CVE-2025-21777ring-buffer: Validate the persistent meta data subbuf array
CVE-2025-21775can: ctucanfd: handle skb allocation failure
CVE-2025-21773can: etas_es58x: fix potential NULL pointer dereference on udev->serial

Showing top 20 of 177 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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