Linux Kernel up to 7.2-rc4 mac802154 mac802154_scan_worker use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$5k-$25k0.45-

Summaryinfo

A vulnerability categorized as very critical has been discovered in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. This affects the function mac802154_scan_worker of the component mac802154. Executing a manipulation can lead to use after free. This vulnerability is tracked as CVE-2026-68126. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4 and classified as very critical. This vulnerability affects the function mac802154_scan_worker of the component mac802154. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mac802154: hold an interface reference across the scan worker mac802154_scan_worker() captures the scanning sub-interface under RCU and then keeps dereferencing sdata->dev after rcu_read_unlock() and outside the rtnl -- in the failure traces, in mac802154_transmit_beacon_req() (skb->dev = sdata->dev), and in the end_scan cleanup. Nothing keeps that netdev alive across the worker iteration. A concurrent DEL_INTERFACE or PHY removal can unregister the interface once the worker drops the rtnl between its two drv_set_channel() sections. unregister_netdevice() frees the netdev asynchronously from netdev_run_todo() with the rtnl already dropped, so neither holding the rtnl nor the per-PHY IEEE802154_IS_SCANNING flag prevents a stale worker iteration from dereferencing the freed netdev -- a KASAN slab-use-after-free, reachable by racing TRIGGER_SCAN against DEL_INTERFACE (both CAP_NET_ADMIN). Pin the netdev with netdev_hold() while the RCU read lock is still held, and release it at every worker exit.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-68126 since 07/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/10/2026).

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch bd7110f0caa32426140ff302a209c53294ef2cfd/dd4754194a706163294b6141460101b99082c8c7/59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b/5f303f622f6bb8907c405e5123a0ab0f70fb0065/234e5e898b713bc0b3a631b6f002897f43d046c8 is able to eliminate this problem.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.7

VulDB Base Score: 9.1
VulDB Temp Score: 8.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: bd7110f0caa32426140ff302a209c53294ef2cfd/dd4754194a706163294b6141460101b99082c8c7/59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b/5f303f622f6bb8907c405e5123a0ab0f70fb0065/234e5e898b713bc0b3a631b6f002897f43d046c8

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68126 (🔒)
GCVE (CVE): GCVE-0-2026-68126
GCVE (VulDB): GCVE-100-387472

Entryinfo

Created: 08/10/2026 15:02
Changes: 08/10/2026 15:02 (59)
Complete: 🔍
Cache ID: 216::103

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