CVE-2024-49937

wifi: cfg80211: Set correct chandef when starting CAC

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: Set correct chandef when starting CAC

When starting CAC in a mode other than AP mode, it return a
"WARNING: CPU: 0 PID: 63 at cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]"
caused by the chandef.chan being null at the end of CAC.

Solution: Ensure the channel definition is set for the different modes
when starting CAC to avoid getting a NULL 'chan' at the end of CAC.

Call Trace:
? show_regs.part.0+0x14/0x16
? __warn+0x67/0xc0
? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]
? report_bug+0xa7/0x130
? exc_overflow+0x30/0x30
? handle_bug+0x27/0x50
? exc_invalid_op+0x18/0x60
? handle_exception+0xf6/0xf6
? exc_overflow+0x30/0x30
? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]
? exc_overflow+0x30/0x30
? cfg80211_chandef_dfs_usable+0x20/0xaf [cfg80211]
? regulatory_propagate_dfs_state.cold+0x1b/0x4c [cfg80211]
? cfg80211_propagate_cac_done_wk+0x1a/0x30 [cfg80211]
? process_one_work+0x165/0x280
? worker_thread+0x120/0x3f0
? kthread+0xc2/0xf0
? process_one_work+0x280/0x280
? kthread_complete_and_exit+0x20/0x20
? ret_from_fork+0x19/0x24

[shorten subject, remove OCB, reorder cases to match previous list]

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-10-21 CVE Reserved
2024-10-21 CVE Published
2024-10-21 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/95f32191e50b75e0f75fae1bb925cdf51d8df0a3	2024-10-17
https://git.kernel.org/stable/c/04053e55dd50741cf6c59b9bbaa4238218c05c70	2024-10-10
https://git.kernel.org/stable/c/f4dbfda159e43d49b43003cc3c2914751939035f	2024-10-10
https://git.kernel.org/stable/c/c628026563f4ea9e0413dd4b69429e4a1db240b1	2024-10-10
https://git.kernel.org/stable/c/20361712880396e44ce80aaeec2d93d182035651	2024-08-28

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.1.113 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.113"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.6.55 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.55"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.10.14 Search vendor "Linux" for product "Linux Kernel" and version " < 6.10.14"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.11.3 Search vendor "Linux" for product "Linux Kernel" and version " < 6.11.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.12-rc1 Search vendor "Linux" for product "Linux Kernel" and version " < 6.12-rc1"		en		Affected