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CVE-2026-74648

Unknown

Last modified

CVE-2026-74648 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < f03398d835f5249c49546f0eb0d0df6792b95d5f; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < a3ac6d849de5f7abe14761d741bbb843ac793454; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 7edd3adb0c80d70b4237640275c559610f438476; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < c5e5d78743992e235b76d2ebe5a403d60315aa8a; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 7b0f62d2986a28e5e4188366bc2f4e2868b14790; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 8b3e4ed9c35d3d3b64fcc23f4a1f22b37c1865b1; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < bd88f6289b7e483216a9c1df15a0460ef9b02cb6; >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b, < 6829665d050983907b560173e49dcc6c11cb2730
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74648?
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.
How severe is CVE-2026-74648?
Severity scoring for CVE-2026-74648 is pending analysis.
How do I fix CVE-2026-74648?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST