CVE-2026-72157

CVE CVE-2026-72157EUVD EUVD-2026-58915Published 2026-08-15T05:53:26.000ZLast changed 2026-08-17T05:41:02.000ZCVSS 8.8

What the advisory describes

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()").

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 patch: 0; e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <2b3b4e5ff5a58ad32817824b0310e63908b12052; e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <55d9895f89970501fe126d1026b586b04a224c27; e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e27beb4536cbf1d59e2d8c2840e87d972aba906f; patch: 6.18.40; e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <e5824d5b841d99a2bcdd4e2c256643293bbc22c1; patch: 6.12.97; patch: 6.6.145; 4.15; patch: 7.1.5; e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e <fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3; patch: 7.2

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

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Linux — Linux

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