CVE-2026-72157

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72157", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.909Z", "datePublished": "2026-08-15T05:53:26.718Z", "dateUpdated": "2026-10-16T18:44:59.473Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:46:55.998Z"}, "descriptions": [{"lang": "en", "value": "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()\")."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The flaw is triggered by malicious ThunderboltIP frames sent from a peer on the same direct Thunderbolt/USB4 link; exploitation is not Internet-routable but is reachable from an adjacent connected host, dock, or peripheral without local syscall access.\nAC:L - An adjacent peer can reliably trigger the overflow by sending a start-of-packet header with frame_count of 19-64 and delivering the matching small frames; no races or attacker-uncontrollable heap layout are required.\nPR:N - The attacker needs no account, capability, or privilege on the victim OS; a malicious Thunderbolt/USB4 peer that completes XDomain ThunderboltIP login can send the crafted RX frames directly over the established DMA path.\nUI:N - Once a ThunderboltIP session is active, which is common with docks, direct laptop-to-laptop links, and shared workstations, triggering the bug requires no further victim action beyond the existing link.\nS:U - Memory corruption occurs in the kernel Thunderbolt network driver during skb reassembly and does not by itself cross a VM, container, or IOMMU security boundary.\nC:H - skb_add_rx_frag() writes past skb_shinfo()->frags[], corrupting adjacent kernel memory; such out-of-bounds skb metadata corruption is reasonably leverageable for information disclosure as well as further exploitation.\nI:H - The overflow is an attacker-controlled out-of-bounds write of skb fragment descriptors beyond MAX_SKB_FRAGS, which can corrupt heap/skb metadata and be developed into arbitrary kernel memory modification or code execution.\nA:H - Corrupting memory past skb_shared_info can cause kernel oopses, panics, or unstable behavior during RX processing, and repeated malicious packets can deny service on affected systems."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/thunderbolt/main.c"], "versions": [{"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "f96b3b35c622d565eff2438993e028d280163f5c", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "6262f51e09d8dc8b07599a9e4f03bd3989d13fff", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "569ba39b2d12995a29dc158e5b4de6e449278f30", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "2b3b4e5ff5a58ad32817824b0310e63908b12052", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "e27beb4536cbf1d59e2d8c2840e87d972aba906f", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "e5824d5b841d99a2bcdd4e2c256643293bbc22c1", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3", "status": "affected", "versionType": "git"}, {"version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "55d9895f89970501fe126d1026b586b04a224c27", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/thunderbolt/main.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.266", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.217", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.10.266"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.15.217"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.1.184"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f96b3b35c622d565eff2438993e028d280163f5c"}, {"url": "https://git.kernel.org/stable/c/6262f51e09d8dc8b07599a9e4f03bd3989d13fff"}, {"url": "https://git.kernel.org/stable/c/569ba39b2d12995a29dc158e5b4de6e449278f30"}, {"url": "https://git.kernel.org/stable/c/2b3b4e5ff5a58ad32817824b0310e63908b12052"}, {"url": "https://git.kernel.org/stable/c/e27beb4536cbf1d59e2d8c2840e87d972aba906f"}, {"url": "https://git.kernel.org/stable/c/e5824d5b841d99a2bcdd4e2c256643293bbc22c1"}, {"url": "https://git.kernel.org/stable/c/fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3"}, {"url": "https://git.kernel.org/stable/c/55d9895f89970501fe126d1026b586b04a224c27"}], "title": "net: thunderbolt: Fix frags[] overflow by bounding frame_count", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72157", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:42:59.492495Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:44:59.473Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72157", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:42:59.492495Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:43:01.267Z"}}], "cna": {"title": "net: thunderbolt: Fix frags[] overflow by bounding frame_count", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - The flaw is triggered by malicious ThunderboltIP frames sent from a peer on the same direct Thunderbolt/USB4 link; exploitation is not Internet-routable but is reachable from an adjacent connected host, dock, or peripheral without local syscall access.\nAC:L - An adjacent peer can reliably trigger the overflow by sending a start-of-packet header with frame_count of 19-64 and delivering the matching small frames; no races or attacker-uncontrollable heap layout are required.\nPR:N - The attacker needs no account, capability, or privilege on the victim OS; a malicious Thunderbolt/USB4 peer that completes XDomain ThunderboltIP login can send the crafted RX frames directly over the established DMA path.\nUI:N - Once a ThunderboltIP session is active, which is common with docks, direct laptop-to-laptop links, and shared workstations, triggering the bug requires no further victim action beyond the existing link.\nS:U - Memory corruption occurs in the kernel Thunderbolt network driver during skb reassembly and does not by itself cross a VM, container, or IOMMU security boundary.\nC:H - skb_add_rx_frag() writes past skb_shinfo()->frags[], corrupting adjacent kernel memory; such out-of-bounds skb metadata corruption is reasonably leverageable for information disclosure as well as further exploitation.\nI:H - The overflow is an attacker-controlled out-of-bounds write of skb fragment descriptors beyond MAX_SKB_FRAGS, which can corrupt heap/skb metadata and be developed into arbitrary kernel memory modification or code execution.\nA:H - Corrupting memory past skb_shared_info can cause kernel oopses, panics, or unstable behavior during RX processing, and repeated malicious packets can deny service on affected systems."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "f96b3b35c622d565eff2438993e028d280163f5c", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "6262f51e09d8dc8b07599a9e4f03bd3989d13fff", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "569ba39b2d12995a29dc158e5b4de6e449278f30", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "2b3b4e5ff5a58ad32817824b0310e63908b12052", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "e27beb4536cbf1d59e2d8c2840e87d972aba906f", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "e5824d5b841d99a2bcdd4e2c256643293bbc22c1", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3", "versionType": "git"}, {"status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "lessThan": "55d9895f89970501fe126d1026b586b04a224c27", "versionType": "git"}], "programFiles": ["drivers/net/thunderbolt/main.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"status": "unaffected", "version": "0", "lessThan": "4.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.266", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.217", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.184", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/thunderbolt/main.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/f96b3b35c622d565eff2438993e028d280163f5c"}, {"url": "https://git.kernel.org/stable/c/6262f51e09d8dc8b07599a9e4f03bd3989d13fff"}, {"url": "https://git.kernel.org/stable/c/569ba39b2d12995a29dc158e5b4de6e449278f30"}, {"url": "https://git.kernel.org/stable/c/2b3b4e5ff5a58ad32817824b0310e63908b12052"}, {"url": "https://git.kernel.org/stable/c/e27beb4536cbf1d59e2d8c2840e87d972aba906f"}, {"url": "https://git.kernel.org/stable/c/e5824d5b841d99a2bcdd4e2c256643293bbc22c1"}, {"url": "https://git.kernel.org/stable/c/fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3"}, {"url": "https://git.kernel.org/stable/c/55d9895f89970501fe126d1026b586b04a224c27"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "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()\")."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.266", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.217", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.184", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:46:55.998Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72157", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:44:59.473Z", "dateReserved": "2026-08-09T03:40:39.909Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:53:26.718Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/thunderbolt/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f96b3b35c622d565eff2438993e028d280163f5c", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "6262f51e09d8dc8b07599a9e4f03bd3989d13fff", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "569ba39b2d12995a29dc158e5b4de6e449278f30", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "2b3b4e5ff5a58ad32817824b0310e63908b12052", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "e27beb4536cbf1d59e2d8c2840e87d972aba906f", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "e5824d5b841d99a2bcdd4e2c256643293bbc22c1", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}, {"lessThan": "55d9895f89970501fe126d1026b586b04a224c27", "status": "affected", "version": "e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/thunderbolt/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.266", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.217", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.184", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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()\")."}], "id": "CVE-2026-72157", "lastModified": "2026-10-16T19:17:12.063", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72157", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:42:59.492495Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:33.497", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b3b4e5ff5a58ad32817824b0310e63908b12052"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/55d9895f89970501fe126d1026b586b04a224c27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/569ba39b2d12995a29dc158e5b4de6e449278f30"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6262f51e09d8dc8b07599a9e4f03bd3989d13fff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e27beb4536cbf1d59e2d8c2840e87d972aba906f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5824d5b841d99a2bcdd4e2c256643293bbc22c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f96b3b35c622d565eff2438993e028d280163f5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: thunderbolt: Fix frags[] overflow by bounding frame_count", "id": "2516672", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516672"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's Thunderbolt network driver. A remote attacker could send specially crafted ThunderboltIP packets with an excessive number of frames. This could lead to an overflow in the `frags[]` array, causing memory corruption after the shared information buffer. This vulnerability allows an attacker to potentially compromise the system's integrity."], "name": "CVE-2026-72157", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72157\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72157\nhttps://lore.kernel.org/linux-cve-announce/2026081535-CVE-2026-72157-0426@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e,2b3b4e5ff5a58ad32817824b0310e63908b12052)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e,e27beb4536cbf1d59e2d8c2840e87d972aba906f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e69b6c02b4c3b8d03be7136f90dd9551ad5a5e,e5824d5b841d99a2bcdd4e2c256643293bbc22c1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e69b6c02b4c3b8d03be7136f90dd9551ad5a5e,fe6b606fbf0c3beb94ccf17fcf31d8c2138264e3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e69b6c02b4c3b8d03be7136f90dd9551ad5a5e,55d9895f89970501fe126d1026b586b04a224c27)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T09:30:04.898636+00:00", "updated": "2026-08-22T10:45:03.940715+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}