{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72447", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.931Z", "datePublished": "2026-08-15T05:56:57.089Z", "dateUpdated": "2026-08-17T05:14:49.557Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:14:49.557Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: hold socket lock when dumping endpoints in sctp_diag\n\nSCTP_DIAG endpoint dumping was traversing endpoint address lists without\nholding lock_sock(), while those lists could change concurrently via\nsocket operations (e.g., bindx changes). This creates a race where\nnla_reserve() counts addresses under RCU protection, but the subsequent\ncopy may see fewer entries, potentially leaking uninitialized memory to\nuserspace.\n\nFix this by:\n\n- Taking a reference on each endpoint during hash traversal\n- Moving socket operations (lock_sock()) outside read_lock_bh()\n- Serializing address list access during dump\n- Reworking sctp_for_each_endpoint() to support restart-based traversal\n with (net, pos) tracking\n\nAlso:\n\n- Add WARN_ON_ONCE() for inconsistent address counts\n- Fix idiag_states filtering for LISTEN vs association cases\n- Skip dumping endpoints being freed (ep->base.dead)\n- Move dump position tracking into iterator, removing cb->args[4] and\n its comment for sctp_ep_dump().,\n- Update the comment for cb->args[4] and remove the comment for unused\n cb->args[5] for sctp_sock_dump().\n\nNote: traversal is restart-based and may re-scan buckets multiple times,\nbut this is acceptable due to small bucket sizes and required to support\nsleeping-safe callbacks.\n\nThis issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero\nDay Initiative." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/sctp/sctp.h", "net/sctp/diag.c", "net/sctp/socket.c" ], "versions": [ { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "f98c294a9369b6fe89e652c06357ee594be4dfa2", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "ec3c2d59a192e17e1014ba71afc368ba162ecac3", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "722576aba0a6d9423714550b1c03239b0f0def77", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "abe7f8828e6ac8be858870c2bf836258844f97d5", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "207bb4ce8fe7de961ae7bb33569ad2cd61f44954", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "f09a245f33e567b604efa1960b7a2d25dd9c8713", "status": "affected", "versionType": "git" }, { "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/sctp/sctp.h", "net/sctp/diag.c", "net/sctp/socket.c" ], "versions": [ { "version": "4.7", "status": "affected" }, { "version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "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": "4.7", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f98c294a9369b6fe89e652c06357ee594be4dfa2" }, { "url": "https://git.kernel.org/stable/c/8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a" }, { "url": "https://git.kernel.org/stable/c/ec3c2d59a192e17e1014ba71afc368ba162ecac3" }, { "url": "https://git.kernel.org/stable/c/722576aba0a6d9423714550b1c03239b0f0def77" }, { "url": "https://git.kernel.org/stable/c/abe7f8828e6ac8be858870c2bf836258844f97d5" }, { "url": "https://git.kernel.org/stable/c/207bb4ce8fe7de961ae7bb33569ad2cd61f44954" }, { "url": "https://git.kernel.org/stable/c/f09a245f33e567b604efa1960b7a2d25dd9c8713" }, { "url": "https://git.kernel.org/stable/c/7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823" } ], "title": "sctp: hold socket lock when dumping endpoints in sctp_diag", "x_generator": { "engine": "bippy-1.2.0" } } } }