{"api_version":"1","generated_at":"2026-08-07T08:05:17+00:00","cve":"CVE-2025-38574","urls":{"html":"https://cve.report/CVE-2025-38574","api":"https://cve.report/api/cve/CVE-2025-38574.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-38574","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-38574"},"summary":{"title":"pptp: ensure minimal skb length in pptp_xmit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npptp: ensure minimal skb length in pptp_xmit()\n\nCommit aabc6596ffb3 (\"net: ppp: Add bound checking for skb data\non ppp_sync_txmung\") fixed ppp_sync_txmunge()\n\nWe need a similar fix in pptp_xmit(), otherwise we might\nread uninit data as reported by syzbot.\n\nBUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline]\n  ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314\n  pppoe_rcv_core+0x1e8/0x760 drivers/net/ppp/pppoe.c:379\n  sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\n  __release_sock+0x1d3/0x330 net/core/sock.c:3213\n  release_sock+0x6b/0x270 net/core/sock.c:3767\n  pppoe_sendmsg+0x15d/0xcb0 drivers/net/ppp/pppoe.c:904\n  sock_sendmsg_nosec net/socket.c:712 [inline]\n  __sock_sendmsg+0x330/0x3d0 net/socket.c:727\n  ____sys_sendmsg+0x893/0xd80 net/socket.c:2566\n  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620\n  __sys_sendmmsg+0x2d9/0x7c0 net/socket.c:2709","state":"PUBLISHED","assigner":"Linux","published_at":"2025-08-19 17:15:34","updated_at":"2026-07-30 06:23:27"},"problem_types":["CWE-908"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.6","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.6","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","data":{"baseScore":8.6,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H","version":"3.1"}}],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","name":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing 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git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 5de7513f38f3c19c0610294ee478242bea356f8c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 504cc4ab91073d2ac7404ad146139f86ecee7193 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 5005d24377378a20e5c0e53052fc4ebdcdcbc611 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ea99b88b1999ebcb24d5d3a6b7910030f40d3bba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b7dcda76fd0615c0599c89f36873a6cd48e02dbb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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6.6.102 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.42 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15.10 6.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16.1 6.16.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"38574","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2025-11-03T17:40:01.333Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"title":"CVE Program Container"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ppp/pptp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"97b8c5d322c5c0038cac4bc56fdbe237d0be426f","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"26672f1679b143aa34fca0b6046b7fd0c184770d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5de7513f38f3c19c0610294ee478242bea356f8c","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"504cc4ab91073d2ac7404ad146139f86ecee7193","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5005d24377378a20e5c0e53052fc4ebdcdcbc611","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"ea99b88b1999ebcb24d5d3a6b7910030f40d3bba","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"b7dcda76fd0615c0599c89f36873a6cd48e02dbb","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"1a04db0fd75cb6034fc27a56b67b3b8b9022a98c","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"de9c4861fb42f0cd72da844c3c34f692d5895b7b","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ppp/pptp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.297","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.241","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.190","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.148","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.102","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.42","versionType":"semver"},{"lessThanOrEqual":"6.15.*","status":"unaffected","version":"6.15.10","versionType":"semver"},{"lessThanOrEqual":"6.16.*","status":"unaffected","version":"6.16.1","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.17","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.297","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.241","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.190","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.148","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.102","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.42","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.15.10","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.16.1","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npptp: ensure minimal skb length in pptp_xmit()\n\nCommit aabc6596ffb3 (\"net: ppp: Add bound checking for skb data\non ppp_sync_txmung\") fixed ppp_sync_txmunge()\n\nWe need a similar fix in pptp_xmit(), otherwise we might\nread uninit data as reported by syzbot.\n\nBUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline]\n  ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314\n  pppoe_rcv_core+0x1e8/0x760 drivers/net/ppp/pppoe.c:379\n  sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\n  __release_sock+0x1d3/0x330 net/core/sock.c:3213\n  release_sock+0x6b/0x270 net/core/sock.c:3767\n  pppoe_sendmsg+0x15d/0xcb0 drivers/net/ppp/pppoe.c:904\n  sock_sendmsg_nosec net/socket.c:712 [inline]\n  __sock_sendmsg+0x330/0x3d0 net/socket.c:727\n  ____sys_sendmsg+0x893/0xd80 net/socket.c:2566\n  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620\n  __sys_sendmmsg+0x2d9/0x7c0 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ensure minimal skb length in pptp_xmit()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-38574","datePublished":"2025-08-19T17:02:53.866Z","dateReserved":"2025-04-16T04:51:24.025Z","dateUpdated":"2026-07-30T05:55:22.307Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-08-19 17:15:34","lastModifiedDate":"2026-07-30 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ensure minimal skb length in pptp_xmit()","CVE":"CVE-2025-38574","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"38574","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\npptp: ensure minimal skb length in pptp_xmit()\n\nCommit aabc6596ffb3 (\"net: ppp: Add bound checking for skb data\non ppp_sync_txmung\") fixed ppp_sync_txmunge()\n\nWe need a similar fix in pptp_xmit(), otherwise we might\nread uninit data as reported by syzbot.\n\nBUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193\n  ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline]\n  ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314\n  pppoe_rcv_core+0x1e8/0x760 drivers/net/ppp/pppoe.c:379\n  sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\n  __release_sock+0x1d3/0x330 net/core/sock.c:3213\n  release_sock+0x6b/0x270 net/core/sock.c:3767\n  pppoe_sendmsg+0x15d/0xcb0 drivers/net/ppp/pppoe.c:904\n  sock_sendmsg_nosec net/socket.c:712 [inline]\n  __sock_sendmsg+0x330/0x3d0 net/socket.c:727\n  ____sys_sendmsg+0x893/0xd80 net/socket.c:2566\n  ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620\n  __sys_sendmmsg+0x2d9/0x7c0 net/socket.c:2709","Type":"Description","Title":"pptp: ensure minimal skb length in pptp_xmit()"}]}}}