Answer in brief
CVE-2026-72157 records a High severity (CVSS 8.8) vulnerability in net: thunderbolt: Fix frags[] overflow by bounding frame_count. 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 8.8. 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 | >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <2b3b4e5ff5a58ad32817824b0310e63908b12052 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e27beb4536cbf1d59e2d8c2840e87d972aba906f || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e5824d5b841d99a2bcdd4e2c256643293bbc22c1 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <55d9895f89970501fe126d1026b586b04a224c27 | 2b3b4e5ff5a58ad32817824b0310e63908b12052, e27beb4536cbf1d59e2d8c2840e87d972aba906f, e5824d5b841d99a2bcdd4e2c256643293bbc22c1, fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3, 55d9895f89970501fe126d1026b586b04a224c27 |
| Linux/Linuxgeneric | 4.15 | Not reported |
| Linux/Linuxgeneric | >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <f96b3b35c622d565eff2438993e028d280163f5c || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <6262f51e09d8dc8b07599a9e4f03bd3989d13fff || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <569ba39b2d12995a29dc158e5b4de6e449278f30 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <2b3b4e5ff5a58ad32817824b0310e63908b12052 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e27beb4536cbf1d59e2d8c2840e87d972aba906f || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e5824d5b841d99a2bcdd4e2c256643293bbc22c1 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3 || >=e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <55d9895f89970501fe126d1026b586b04a224c27 | f96b3b35c622d565eff2438993e028d280163f5c, 6262f51e09d8dc8b07599a9e4f03bd3989d13fff, 569ba39b2d12995a29dc158e5b4de6e449278f30, 2b3b4e5ff5a58ad32817824b0310e63908b12052, e27beb4536cbf1d59e2d8c2840e87d972aba906f, e5824d5b841d99a2bcdd4e2c256643293bbc22c1, fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3, 55d9895f89970501fe126d1026b586b04a224c27 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: net: thunderbolt: Fix frags[] overflow by bounding frame_count tbnet_poll() assembles a multi-frame ThunderboltIP packet into one skb. The first frame goes into the skb linear area and every further frame is added as a page fragment. skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, hdr_size, frame_size, TBNET_RX_PAGE_SIZE - hdr_size); A packet of frame_count frames therefore ends up with frame_count - 1 fragments. tbnet_check_frame() only bounds the peer supplied frame_count to TBNET_RING_SIZE / 4 (64), which is far above MAX_SKB_FRAGS (17 by default). A peer that sends a packet of 19 or more small frames pushes nr_frags past MAX_SKB_FRAGS, so skb_add_rx_frag() writes past skb_shinfo()->frags[] and corrupts memory after the shared info. Tighten the start of packet bound to MAX_SKB_FRAGS + 1 so a packet can never produce more fragments than frags[] can hold. This matches the recent skb frags overflow fixes in other receive paths, for example f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path") and 600dc40554dc ("net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()").
Quoted source text, attributed separately from HOL analysis.