CVE-2026-72447

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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 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/sctp/sctp.h", "net/sctp/diag.c", "net/sctp/socket.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f98c294a9369b6fe89e652c06357ee594be4dfa2", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "ec3c2d59a192e17e1014ba71afc368ba162ecac3", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "722576aba0a6d9423714550b1c03239b0f0def77", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "abe7f8828e6ac8be858870c2bf836258844f97d5", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "207bb4ce8fe7de961ae7bb33569ad2cd61f44954", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "f09a245f33e567b604efa1960b7a2d25dd9c8713", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/sctp/sctp.h", "net/sctp/diag.c", "net/sctp/socket.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.7"}, {"lessThan": "4.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "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\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."}], "id": "CVE-2026-72447", "lastModified": "2026-11-06T17:19:44.627", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72447", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:55:33.287440Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:18.600", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/207bb4ce8fe7de961ae7bb33569ad2cd61f44954"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/722576aba0a6d9423714550b1c03239b0f0def77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abe7f8828e6ac8be858870c2bf836258844f97d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec3c2d59a192e17e1014ba71afc368ba162ecac3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f09a245f33e567b604efa1960b7a2d25dd9c8713"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f98c294a9369b6fe89e652c06357ee594be4dfa2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: sctp: hold socket lock when dumping endpoints in sctp_diag", "id": "2516664", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516664"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-824", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: hold socket lock when dumping endpoints in sctp_diag\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.\nFix this by:\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\nwith (net, pos) tracking\nAlso:\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\nits comment for sctp_ep_dump().,\n- Update the comment for cb->args[4] and remove the comment for unused\ncb->args[5] for sctp_sock_dump().\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.\nThis issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero\nDay Initiative.", "A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) diagnostic (SCTP_DIAG) endpoint dumping mechanism. A race condition occurs when address lists are traversed without holding the necessary socket lock, allowing concurrent modifications. A local attacker could exploit this to potentially leak uninitialized memory from the kernel to userspace, leading to information disclosure."], "name": "CVE-2026-72447", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "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-2026-72447\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72447\nhttps://lore.kernel.org/linux-cve-announce/2026081530-CVE-2026-72447-0526@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,f98c294a9369b6fe89e652c06357ee594be4dfa2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,ec3c2d59a192e17e1014ba71afc368ba162ecac3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,722576aba0a6d9423714550b1c03239b0f0def77)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,abe7f8828e6ac8be858870c2bf836258844f97d5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,207bb4ce8fe7de961ae7bb33569ad2cd61f44954)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,f09a245f33e567b604efa1960b7a2d25dd9c8713)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8f840e47f190cbe61a96945c13e9551048d42cef,7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823)"}}], "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": "semver", "value": "4.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.261,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.212,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.97,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.40,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-15T19:00:03.258458+00:00", "updated": "2026-08-22T05:45:05.251618+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}