{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74705", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.927Z", "datePublished": "2026-08-22T15:33:04.110Z", "dateUpdated": "2026-08-22T15:33:04.110Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:33:04.110Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: fix potential use-after-free in tunnel segmentation\n\n__skb_udp_tunnel_segment() gets the UDP header before ensuring the\ntunnel header is in the skb head. If the pull reallocates skb->head,\nthe saved UDP header pointer is no longer valid.\n\nGet the UDP header after the pull to avoid a potential use-after-free."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp_offload.c"], "versions": [{"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "6a733a38b983d8c2e222f13968209010cf44de87", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "19d89b13a43640b2da2f277ee462d919d988cb6f", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "b3df61bb745eb5201eac22679a2839d4ccbf3442", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "1ae134c012e10384cdac420b5cc6e0615cde0b55", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "5161e67c561c4f28a5d9335a6e859b02511de92b", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "64d322c288577793eedd352b96ef75234ed380fe", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "588d4a6795d99d080f74ef0b5f391ea8c453ae5d", "status": "affected", "versionType": "git"}, {"version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "lessThan": "d0f86fb36eb260abd10007b62c9dcc1028e03e61", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp_offload.c"], "versions": [{"version": "4.6", "status": "affected"}, {"version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "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": "4.6", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87"}, {"url": "https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f"}, {"url": "https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442"}, {"url": "https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55"}, {"url": "https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b"}, {"url": "https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe"}, {"url": "https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d"}, {"url": "https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61"}], "title": "udp: fix potential use-after-free in tunnel segmentation", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/udp_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6a733a38b983d8c2e222f13968209010cf44de87", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "19d89b13a43640b2da2f277ee462d919d988cb6f", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "b3df61bb745eb5201eac22679a2839d4ccbf3442", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "1ae134c012e10384cdac420b5cc6e0615cde0b55", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "5161e67c561c4f28a5d9335a6e859b02511de92b", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "64d322c288577793eedd352b96ef75234ed380fe", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "588d4a6795d99d080f74ef0b5f391ea8c453ae5d", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}, {"lessThan": "d0f86fb36eb260abd10007b62c9dcc1028e03e61", "status": "affected", "version": "dbef491ebe7f3a4fb1b9111878b86a426fd540b7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/udp_offload.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.6"}, {"lessThan": "4.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.152", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "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\nudp: fix potential use-after-free in tunnel segmentation\n\n__skb_udp_tunnel_segment() gets the UDP header before ensuring the\ntunnel header is in the skb head. If the pull reallocates skb->head,\nthe saved UDP header pointer is no longer valid.\n\nGet the UDP header after the pull to avoid a potential use-after-free."}], "id": "CVE-2026-74705", "lastModified": "2026-08-22T16:16:45.213", "metrics": {}, "published": "2026-08-22T16:16:45.213", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

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