{"id":"CVE-2026-72157","revision":"974ff413585b4fd19460103f0807dcbc","records":[{"revision":"974ff413585b4fd19460103f0807dcbc","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72157","aliases":[],"title":"net: thunderbolt: Fix frags[] overflow by bounding frame_count","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: thunderbolt: Fix frags[] overflow by bounding frame_count\n\ntbnet_poll() assembles a multi-frame ThunderboltIP packet into one skb. The\nfirst frame goes into the skb linear area and every further frame is added as\na page fragment.\n\n\tskb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,\n\t\t\tpage, hdr_size, frame_size,\n\t\t\tTBNET_RX_PAGE_SIZE - hdr_size);\n\nA packet of frame_count frames therefore ends up with frame_count - 1\nfragments. tbnet_check_frame() only bounds the peer supplied frame_count to\nTBNET_RING_SIZE / 4 (64), which is far above MAX_SKB_FRAGS (17 by default). A\npeer that sends a packet of 19 or more small frames pushes nr_frags past\nMAX_SKB_FRAGS, so skb_add_rx_frag() writes past skb_shinfo()->frags[] and\ncorrupts memory after the shared info.\n\nTighten the start of packet bound to MAX_SKB_FRAGS + 1 so a packet can never\nproduce more fragments than frags[] can hold. This matches the recent skb\nfrags overflow fixes in other receive paths, for example f0813bcd2d9d (\"net:\nwwan: t7xx: fix potential skb->frags overflow in RX path\") and 600dc40554dc\n(\"net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()\").","state":0,"publishedAt":"2026-08-15T05:53:26.718+00:00","modifiedAt":"2026-10-16T18:44:59.473+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/thunderbolt/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"f96b3b35c622d565eff2438993e028d280163f5c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"6262f51e09d8dc8b07599a9e4f03bd3989d13fff\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"569ba39b2d12995a29dc158e5b4de6e449278f30\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"2b3b4e5ff5a58ad32817824b0310e63908b12052\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"e27beb4536cbf1d59e2d8c2840e87d972aba906f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"e5824d5b841d99a2bcdd4e2c256643293bbc22c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e\",\n                            \"lessThan\": \"55d9895f89970501fe126d1026b586b04a224c27\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/thunderbolt/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.266\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.217\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.184\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f96b3b35c622d565eff2438993e028d280163f5c","https://git.kernel.org/stable/c/6262f51e09d8dc8b07599a9e4f03bd3989d13fff","https://git.kernel.org/stable/c/569ba39b2d12995a29dc158e5b4de6e449278f30","https://git.kernel.org/stable/c/2b3b4e5ff5a58ad32817824b0310e63908b12052","https://git.kernel.org/stable/c/e27beb4536cbf1d59e2d8c2840e87d972aba906f","https://git.kernel.org/stable/c/e5824d5b841d99a2bcdd4e2c256643293bbc22c1","https://git.kernel.org/stable/c/fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3","https://git.kernel.org/stable/c/55d9895f89970501fe126d1026b586b04a224c27"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72157","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72157","identifiers":["CVE-2026-72157"]},"retained":false,"historicalAffected":[]}],"coverage":[]}