Linux Kernel up to 7.2-rc3 mac80211_hwsim hwsim_virtio_rx_work buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc3. Affected by this issue is the function hwsim_virtio_rx_work of the component mac80211_hwsim. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2026-68411. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc3. This vulnerability affects the function hwsim_virtio_rx_work of the component mac80211_hwsim. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: clamp virtio RX length before skb_put hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by the device straight to skb_put() on a fixed-size receive skb. A backend reporting a length larger than the skb tailroom drives skb_put() past the buffer end and hits skb_over_panic() -- a host-triggerable guest panic (denial of service). Clamp the length to the skb's available room before skb_put(). A conforming device never reports more than the posted buffer size, so valid frames are unaffected; a truncated over-report then fails the length/header checks in hwsim_virtio_handle_cmd() and is dropped, so truncating rather than dropping here cannot be turned into a parsing problem.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-68411 since 07/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful 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-rc4 eliminates this vulnerability. Applying the patch 82c5a30a66e2a7337d99476c67d6fc1a99c4250e/fade308845c89f784da8a6780c1e77258488f1b6/6dc76371a9a360c29de00df5b11563102d9d675a/99dc05c75acc3c8cde8d89c5371f4b569de5ac62/10a2b430f8f06ae14b9590b6f6faa6b588ef0654 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

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-rc4
Patch: 82c5a30a66e2a7337d99476c67d6fc1a99c4250e/fade308845c89f784da8a6780c1e77258488f1b6/6dc76371a9a360c29de00df5b11563102d9d675a/99dc05c75acc3c8cde8d89c5371f4b569de5ac62/10a2b430f8f06ae14b9590b6f6faa6b588ef0654

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-2026-68411 (🔒)
GCVE (CVE): GCVE-0-2026-68411
GCVE (VulDB): GCVE-100-387784

Entryinfo

Created: 08/10/2026 18:44
Changes: 08/10/2026 18:44 (59)
Complete: 🔍
Cache ID: 216::103

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