Answer in brief
CVE-2026-68373 records a High severity (CVSS 8.1) vulnerability in wifi: at76c50x-usb: avoid length underflow in at76_guess_freq(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1264b951463a00efebe1bb596499aaad620ec8af <e165a1d295e7e814e13b0f92c86e5d48309509ce || >=1264b951463a00efebe1bb596499aaad620ec8af <bcde7249d45f52f994a9872bedf45994472ade77 || >=1264b951463a00efebe1bb596499aaad620ec8af <fb1b50ab699211e777dca5ccfb648788b6a6e519 || >=1264b951463a00efebe1bb596499aaad620ec8af <f742d9c98b5c504fc9e6744eef13a721c2aea486 || >=1264b951463a00efebe1bb596499aaad620ec8af <61a799ffd1e5a4fd3702d547828b7ff3d161468e | e165a1d295e7e814e13b0f92c86e5d48309509ce, bcde7249d45f52f994a9872bedf45994472ade77, fb1b50ab699211e777dca5ccfb648788b6a6e519, f742d9c98b5c504fc9e6744eef13a721c2aea486, 61a799ffd1e5a4fd3702d547828b7ff3d161468e |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
| Linux/Linuxgeneric | >=1264b951463a00efebe1bb596499aaad620ec8af <cb831aff2f850f72bc5ff5ad77d0a70bb5a84061 || >=1264b951463a00efebe1bb596499aaad620ec8af <4875680d1703f56afa6257ba30244f2fb44ed205 || >=1264b951463a00efebe1bb596499aaad620ec8af <b406f33d234f98c8b310fdab5cbb492d85e98e49 || >=1264b951463a00efebe1bb596499aaad620ec8af <e165a1d295e7e814e13b0f92c86e5d48309509ce || >=1264b951463a00efebe1bb596499aaad620ec8af <bcde7249d45f52f994a9872bedf45994472ade77 || >=1264b951463a00efebe1bb596499aaad620ec8af <fb1b50ab699211e777dca5ccfb648788b6a6e519 || >=1264b951463a00efebe1bb596499aaad620ec8af <f742d9c98b5c504fc9e6744eef13a721c2aea486 || >=1264b951463a00efebe1bb596499aaad620ec8af <61a799ffd1e5a4fd3702d547828b7ff3d161468e | cb831aff2f850f72bc5ff5ad77d0a70bb5a84061, 4875680d1703f56afa6257ba30244f2fb44ed205, b406f33d234f98c8b310fdab5cbb492d85e98e49, e165a1d295e7e814e13b0f92c86e5d48309509ce, bcde7249d45f52f994a9872bedf45994472ade77, fb1b50ab699211e777dca5ccfb648788b6a6e519, f742d9c98b5c504fc9e6744eef13a721c2aea486, 61a799ffd1e5a4fd3702d547828b7ff3d161468e |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.