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CVE-2025-21979— wifi: cfg80211: cancel wiphy_work before freeing wiphy

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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wifi cfg80211模块在释放wiphy前未取消工作队列。

CVSS 7.8 · High EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux ddb1bfbf4ab5c753954d0cd728253b642934a9f2< 8930a3e1568cf534f86c8ed2def817c6d0528fc1 affected
3fcc6d7d5f40dad56dee7bde787b7e23edd4b93c< 0272d4af7f92997541d8bbf4c51918b93ded6ee2 affected
a3ee4dc84c4e9d14cb34dad095fd678127aca5b6< 75d262ad3c36d52852d764588fcd887f0fcd9138 affected
a3ee4dc84c4e9d14cb34dad095fd678127aca5b6< a5158d67bff06cb6fea31be39aeb319fd908ed8e affected
a3ee4dc84c4e9d14cb34dad095fd678127aca5b6< dea22de162058216a90f2706f0d0b36f0ff309fd affected
a3ee4dc84c4e9d14cb34dad095fd678127aca5b6< 72d520476a2fab6f3489e8388ab524985d6c4b90 affected
6.1.57< 6.1.132 affected
6.5 affected
… +6 more rows
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I. Basic Information for CVE-2025-21979

Vulnerability Information
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Vulnerability Title
wifi: cfg80211: cancel wiphy_work before freeing wiphy
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel wiphy_work before freeing wiphy A wiphy_work can be queued from the moment the wiphy is allocated and initialized (i.e. wiphy_new_nm). When a wiphy_work is queued, the rdev::wiphy_work is getting queued. If wiphy_free is called before the rdev::wiphy_work had a chance to run, the wiphy memory will be freed, and then when it eventally gets to run it'll use invalid memory. Fix this by canceling the work before freeing the wiphy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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wifi cfg80211模块在释放wiphy前未取消工作队列。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux ddb1bfbf4ab5c753954d0cd728253b642934a9f2 ~ 8930a3e1568cf534f86c8ed2def817c6d0528fc1 -
Linux Linux 6.5 -

II. Public POCs for CVE-2025-21979

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III. Intelligence Information for CVE-2025-21979

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Same Patch Batch · Linux · 2025-04-01 · 93 CVEs total

CVE-2025-21954 9.8 CRITICAL netmem: prevent TX of unreadable skbs
CVE-2025-21927 9.8 CRITICAL nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()
CVE-2025-21955 8.8 HIGH ksmbd: prevent connection release during oplock break notification
CVE-2025-21946 8.8 HIGH ksmbd: fix out-of-bounds in parse_sec_desc()
CVE-2025-21945 8.8 HIGH ksmbd: fix use-after-free in smb2_lock
CVE-2025-21969 8.8 HIGH Bluetooth: L2CAP: Fix slab-use-after-free Read in l2cap_send_cmd
CVE-2025-21967 8.8 HIGH ksmbd: fix use-after-free in ksmbd_free_work_struct
CVE-2025-21972 8.8 HIGH net: mctp: unshare packets when reassembling
CVE-2025-21947 8.1 HIGH ksmbd: fix type confusion via race condition when using ipc_msg_send_request
CVE-2025-21926 7.8 HIGH net: gso: fix ownership in __udp_gso_segment
CVE-2025-21971 7.8 HIGH net_sched: Prevent creation of classes with TC_H_ROOT
CVE-2025-21896 7.8 HIGH fuse: revert back to __readahead_folio() for readahead
CVE-2025-21899 7.8 HIGH tracing: Fix bad hist from corrupting named_triggers list
CVE-2025-21901 7.8 HIGH RDMA/bnxt_re: Add sanity checks on rdev validity
CVE-2025-21966 7.8 HIGH dm-flakey: Fix memory corruption in optional corrupt_bio_byte feature
CVE-2025-21965 7.8 HIGH sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()
CVE-2025-21934 7.8 HIGH rapidio: fix an API misues when rio_add_net() fails
CVE-2025-21939 7.8 HIGH drm/xe/hmm: Don't dereference struct page pointers without notifier lock
CVE-2025-21958 7.8 HIGH Revert "openvswitch: switch to per-action label counting in conntrack"
CVE-2025-21949 7.8 HIGH LoongArch: Set hugetlb mmap base address aligned with pmd size

Showing top 20 of 93 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21979

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