wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 2c5dee15239f3f3e31aa5c8808f18996c039e2c1, 4.15, 4.20.
- Severity is disputed: the assigning authority (CNA) scores it 8.8, NVD 5.5.
Low priority for now. Upgrade to Linux Linux 2c5dee15239f3f3e31aa5c8808f18996c039e2c1, 4.15, 4.20 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac() Callers of wdev_chandef() must hold the wiphy mutex. But the worker cfg80211_propagate_cac_done_wk() never takes the lock. Which triggers the warning below with the mesh_peer_connected_dfs test from hostapd and not (yet) released mac80211 code changes: WARNING: CPU: 0 PID: 495 at net/wireless/chan.c:1552 wdev_chandef+0x60/0x165 Modules linked in: CPU: 0 UID: 0 PID: 495 Comm: kworker/u4:2 Not tainted 6.14.0-rc5-wt-g03960e6f9d47 #33 13c287eeabfe1efea01c0bcc863723ab082e17cf Workqueue: cfg80211 cfg80211_propagate_cac_done_wk Stack: 00000000 00000001 ffffff00 6093267c 00000000 6002ec30 6d577c50 60037608 00000000 67e8d108 6063717b 00000000 Call Trace: [<6002ec30>] ? _printk+0x0/0x98 [<6003c2b3>] show_stack+0x10e/0x11a [<6002ec30>] ? _printk+0x0/0x98 [<60037608>] dump_stack_lvl+0x71/0xb8 [<6063717b>] ? wdev_chandef+0x60/0x165 [<6003766d>] dump_stack+0x1e/0x20 [<6005d1b7>] __warn+0x101/0x20f [<6005d3a8>] warn_slowpath_fmt+0xe3/0x15d [<600b0c5c>] ? mark_lock.part.0+0x0/0x4ec [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<600b11a2>] ? mark_held_locks+0x5a/0x6e [<6005d2c5>] ? warn_slowpath_fmt+0x0/0x15d [<60052e53>] ? unblock_signals+0x3a/0xe7 [<60052f2d>] ? um_set_signals+0x2d/0x43 [<60751191>] ? __this_cpu_preempt_check+0x0/0x16 [<607508b2>] ? lock_is_held_type+0x207/0x21f [<6063717b>] wdev_chandef+0x60/0x165 [<605f89b4>] regulatory_propagate_dfs_state+0x247/0x43f [<60052f00>] ? um_set_signals+0x0/0x43 [<605e6bfd>] cfg80211_propagate_cac_done_wk+0x3a/0x4a [<6007e460>] process_scheduled_works+0x3bc/0x60e [<6007d0ec>] ? move_linked_works+0x4d/0x81 [<6007d120>] ? assign_work+0x0/0xaa [<6007f81f>] worker_thread+0x220/0x2dc [<600786ef>] ? set_pf_worker+0x0/0x57 [<60087c96>] ? to_kthread+0x0/0x43 [<6008ab3c>] kthread+0x2d3/0x2e2 [<6007f5ff>] ? worker_thread+0x0/0x2dc [<6006c05b>] ? calculate_sigpending+0x0/0x56 [<6003b37d>] new_thread_handler+0x4a/0x64 irq event stamp: 614611 hardirqs last enabled at (614621): [<00000000600bc96b>] __up_console_sem+0x82/0xaf hardirqs last disabled at (614630): [<00000000600bc92c>] __up_console_sem+0x43/0xaf softirqs last enabled at (614268): [<00000000606c55c6>] __ieee80211_wake_queue+0x933/0x985 softirqs last disabled at (614266): [<00000000606c52d6>] __ieee80211_wake_queue+0x643/0x985
- Published
- Aug 22, 2025
- Updated
- Oct 15, 2026
- EPSS
- 0.1% · 7th percentile
- CWE
- CWE-667
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 5.5
- CNA · Linux
- 8.8
- 3.3 point gap
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.14.170 and later · before 4.15
- linux linux kernel4.19.102 and later · before 4.20
- linux linux kernel5.4.18 and later · before 5.5
- linux linux kernel5.5.1 and later · before 6.6.118
- linux linux kernel6.7 and later · before 6.12.57
- linux linux kernel6.13 and later · before 6.15.10
- linux linux kernel6.16 and later · before 6.16.1
- linux linux kernel5.5
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 2dbb6faebb94d6d5ae87e5ea6be9280c366393e1, a4f85674e4693904ade7cbf6722d0d105d8062d8, e233cbaf8ecc5859f0417dd53899da4edb477991, 5.5affected
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before defe9ce121160788547e8e6ec4438ad8a14f40ddaffected · git
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before b3d24038eb775f2f7a1dfef58d8e1dc444a12820affected · git
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before 4a63523d3541eef4cf504a9682e6fbe94ffe79a6affected · git
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before 7022df2248c08c6f75a01714163ac902333bf3dbaffected · git
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before dbce810607726408f889d3358f4780fd1436861eaffected · git
- 26ec17a1dc5ecdd8d91aba63ead6f8b5ad5dea0d and later · before 2c5dee15239f3f3e31aa5c8808f18996c039e2c1affected · git
- 4.14.170 and later · before 4.15affected · semver
- 4.19.102 and later · before 4.20affected · semver
- 5.4.18 and later · before 5.5affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:11 | linux-6.1 | before 6.1.164-1~deb11u1 | 6.1.164-1~deb11u1 |
| Debian:12 | linux | before 6.1.164-1 | 6.1.164-1 |
| Debian:13 | linux | before 6.12.57-1 | 6.12.57-1 |
| Debian:14 | linux | before 6.16.3-1 | 6.16.3-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 2c5dee15239f3f3e31aa5c8808f18996c039e2c1 | Vendor (CNA) |
| Linux Linux | 4.15 | Vendor (CNA) |
| Linux Linux | 4.20 | Vendor (CNA) |
| Linux Linux | 4a63523d3541eef4cf504a9682e6fbe94ffe79a6 | Vendor (CNA) |
| Linux Linux | 5.5 | Vendor (CNA) |
| Linux Linux | 7022df2248c08c6f75a01714163ac902333bf3db | Vendor (CNA) |
| Linux Linux | b3d24038eb775f2f7a1dfef58d8e1dc444a12820 | Vendor (CNA) |
| Linux Linux | dbce810607726408f889d3358f4780fd1436861e | Vendor (CNA) |
| Linux Linux | defe9ce121160788547e8e6ec4438ad8a14f40dd | Vendor (CNA) |
| debian:linux | 6.1.164-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.1 | 6.1.164-1~deb11u1 · Debian:11 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-667 · Improper LockingCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (5 more)Show less
- git.kernel.org/stable/c/4a63523d3541eef4cf504a9682e6fbe94ffe79a6
- git.kernel.org/stable/c/7022df2248c08c6f75a01714163ac902333bf3db
- git.kernel.org/stable/c/b3d24038eb775f2f7a1dfef58d8e1dc444a12820
- git.kernel.org/stable/c/dbce810607726408f889d3358f4780fd1436861e
- git.kernel.org/stable/c/defe9ce121160788547e8e6ec4438ad8a14f40dd
Vendor advisories and official records. Exploit/PoC links are deliberately left out.