Linux Kernel up to 7.1.8 rtl8723bs rtw_cfg80211_monitor_if_xmit_entry out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$0-$5k0.00-

Summaryinfo

A vulnerability categorized as very critical has been discovered in Linux Kernel up to 7.1.8. This vulnerability affects the function rtw_cfg80211_monitor_if_xmit_entry of the component rtl8723bs. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2026-74648. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.1.8 and classified as very critical. Affected by this issue is the function rtw_cfg80211_monitor_if_xmit_entry of the component rtl8723bs. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: validate monitor transmit frame lengths rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and then reads the 802.11 frame control field without checking that a base 802.11 header remains. The data path also pulls the calculated 802.11, QoS and SNAP header span before confirming that the skb contains it. A truncated frame can therefore cause out-of-bounds reads or leave insufficient data for the Ethernet address writes. Reject frames that do not contain the base 802.11 header and data frames that do not contain their complete calculated header span.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-74648 since 08/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/22/2026).

Upgrading to version 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45 or 7.1.9 eliminates this vulnerability. Applying the patch f03398d835f5249c49546f0eb0d0df6792b95d5f/a3ac6d849de5f7abe14761d741bbb843ac793454/7edd3adb0c80d70b4237640275c559610f438476/c5e5d78743992e235b76d2ebe5a403d60315aa8a/7b0f62d2986a28e5e4188366bc2f4e2868b14790/8b3e4ed9c35d3d3b64fcc23f4a1f22b37c1865b1/bd88f6289b7e483216a9c1df15a0460ef9b02cb6/6829665d050983907b560173e49dcc6c11cb2730 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: Out-of-bounds
CWE: CWE-125 / 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 5.10.265/5.15.216/6.1.183/6.6.152/6.12.104/6.18.45/7.1.9
Patch: f03398d835f5249c49546f0eb0d0df6792b95d5f/a3ac6d849de5f7abe14761d741bbb843ac793454/7edd3adb0c80d70b4237640275c559610f438476/c5e5d78743992e235b76d2ebe5a403d60315aa8a/7b0f62d2986a28e5e4188366bc2f4e2868b14790/8b3e4ed9c35d3d3b64fcc23f4a1f22b37c1865b1/bd88f6289b7e483216a9c1df15a0460ef9b02cb6/6829665d050983907b560173e49dcc6c11cb2730

Timelineinfo

08/15/2026 CVE reserved
08/22/2026 +7 days Advisory disclosed
08/22/2026 +0 days VulDB entry created
08/22/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74648 (🔒)
GCVE (CVE): GCVE-0-2026-74648
GCVE (VulDB): GCVE-100-394430

Entryinfo

Created: 08/22/2026 18:38
Changes: 08/22/2026 18:38 (59)
Complete: 🔍
Cache ID: 216::103

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