CVE-2026-68373
CVE CVE-2026-68373EUVD EUVD-2026-55559Published 2026-08-10T12:03:51.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: wifi: at76c50x-usb: avoid length underflow in at76_guess_freq() at76_guess_freq() checks only that the received frame is at least a bare 802.11 header (24 bytes) before subtracting the fixed management-body offset: len -= el_off; For both beacon and probe response frames, el_off is 36. If the frame is shorter than el_off, subtracting it causes the calculated IE length to wrap. The length is eventually passed to cfg80211_find_elem_match() as a very large unsigned value, so the element walk runs beyond the RX skb. This path is reached from at76_rx_tasklet() while scanning. If the device delivers a truncated beacon or probe response, the oversized IE length causes an out-of-bounds read during scanning. Skip the IE lookup if the frame does not reach the variable elements, before subtracting el_off.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 2.6.30; patch: 7.2-rc5; 1264b951463a00efebe1bb596499aaad620ec8af <fb1b50ab699211e777dca5ccfb648788b6a6e519; patch: 6.18.42; 1264b951463a00efebe1bb596499aaad620ec8af <bcde7249d45f52f994a9872bedf45994472ade77; patch: 7.1.6; 1264b951463a00efebe1bb596499aaad620ec8af <e165a1d295e7e814e13b0f92c86e5d48309509ce; 1264b951463a00efebe1bb596499aaad620ec8af <61a799ffd1e5a4fd3702d547828b7ff3d161468e; patch: 0; patch: 6.6.148; patch: 6.12.101; 1264b951463a00efebe1bb596499aaad620ec8af <f742d9c98b5c504fc9e6744eef13a721c2aea486
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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