{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-21640", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.727Z", "datePublished": "2025-01-19T10:17:57.593Z", "dateUpdated": "2025-02-02T10:16:04.929Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-02-02T10:16:04.929Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\n\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.sctp_hmac_alg' is\nused."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/sysctl.c"], "versions": [{"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "1031462a944ba0fa83c25ab1111465f8345b5589", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "03ca51faba2b017bf6c90e139434c4117d0afcdc", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "86ddf8118123cb58a0fb8724cad6979c4069065b", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "3cd0659deb9c03535fd61839e91d4d4d3e51ac71", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "ad673e514b2793b8d5902f6ba6ab7e890dea23d5", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "f0bb3935470684306e4e04793a20ac4c4b08de0b", "status": "affected", "versionType": "git"}, {"version": "3c68198e75111a905ac2412be12bf7b29099729b", "lessThan": "ea62dd1383913b5999f3d16ae99d411f41b528d4", "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/sctp/sysctl.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.290", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.234", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.177", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.125", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.72", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.10", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589"}, {"url": "https://git.kernel.org/stable/c/03ca51faba2b017bf6c90e139434c4117d0afcdc"}, {"url": "https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b"}, {"url": "https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71"}, {"url": "https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5"}, {"url": "https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b"}, {"url": "https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4"}], "title": "sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\n\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.sctp_hmac_alg' is\nused."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: sysctl: cookie_hmac_alg: evitar usar current->nsproxy Como se mencion\u00f3 en un commit anterior de esta serie, no se recomienda usar la estructura 'net' a trav\u00e9s de 'current' por diferentes razones: - Inconsistencia: obtener informaci\u00f3n de los netns del lector/escritor vs solo de los netns del abridor. - current->nsproxy puede ser NULL en algunos casos, lo que resulta en un 'Oops' (null-ptr-deref), por ejemplo cuando la tarea actual est\u00e1 saliendo, como lo detect\u00f3 syzbot [1] usando acct(2). La estructura 'net' se puede obtener de table->data usando Container_of(). Tenga en cuenta que table->data tambi\u00e9n se puede usar directamente, ya que este es el \u00fanico miembro necesario de la estructura 'net', pero eso aumentar\u00eda el tama\u00f1o de esta correcci\u00f3n, para usar '*data' en todos los lugares donde se use 'net->sctp.sctp_hmac_alg'."}], "id": "CVE-2025-21640", "lastModified": "2025-02-02T11:15:15.150", "metrics": {}, "published": "2025-01-19T11:15:09.537", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03ca51faba2b017bf6c90e139434c4117d0afcdc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy", "id": "2338816", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2338816"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n- Inconsistency: getting info from the reader's/writer's netns vs only\nfrom the opener's netns.\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n(null-ptr-deref), e.g. when the current task is exiting, as spotted by\nsyzbot [1] using acct(2).\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.sctp_hmac_alg' is\nused."], "name": "CVE-2025-21640", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-01-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21640\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21640\nhttps://lore.kernel.org/linux-cve-announce/2025011944-CVE-2025-21640-4dd1@gregkh/T"], "threat_severity": "Low"}