{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47291", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-21T13:27:52.130Z", "datePublished": "2024-05-21T14:35:16.071Z", "dateUpdated": "2026-05-11T13:51:39.040Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:51:39.040Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\n\nWhile running the self-tests on a KASAN enabled kernel, I observed a\nslab-out-of-bounds splat very similar to the one reported in\ncommit 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in\n fib6_nh_flush_exceptions\").\n\nWe additionally need to take care of fib6_metrics initialization\nfailure when the caller provides an nh.\n\nThe fix is similar, explicitly free the route instead of calling\nfib6_info_release on a half-initialized object."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/route.c"], "versions": [{"version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "830251361425c5be044db4d826aaf304ea3d14c6", "status": "affected", "versionType": "git"}, {"version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "ce8fafb68051fba52546f8bbe8621f7641683680", "status": "affected", "versionType": "git"}, {"version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "115784bcccf135c3a3548098153413d76f16aae0", "status": "affected", "versionType": "git"}, {"version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "8fb4792f091e608a0a1d353dfdf07ef55a719db5", "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/ipv6/route.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.136", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.54", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13.6", "lessThanOrEqual": "5.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.14", "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": "5.3", "versionEndExcluding": "5.4.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.10.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.13.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"}, {"url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"}, {"url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"}, {"url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"}], "title": "ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.000Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-08-19T18:51:27.837598Z", "id": "CVE-2021-47291", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-19T18:52:14.586Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:08.000Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47291", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-08-19T18:51:27.837598Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-08-19T18:52:11.686Z"}}], "cna": {"title": "ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "830251361425c5be044db4d826aaf304ea3d14c6", "versionType": "git"}, {"status": "affected", "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "ce8fafb68051fba52546f8bbe8621f7641683680", "versionType": "git"}, {"status": "affected", "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "115784bcccf135c3a3548098153413d76f16aae0", "versionType": "git"}, {"status": "affected", "version": "f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74", "lessThan": "8fb4792f091e608a0a1d353dfdf07ef55a719db5", "versionType": "git"}], "programFiles": ["net/ipv6/route.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"status": "unaffected", "version": "0", "lessThan": "5.3", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.136", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.54", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.13.6", "versionType": "semver", "lessThanOrEqual": "5.13.*"}, {"status": "unaffected", "version": "5.14", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv6/route.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"}, {"url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"}, {"url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"}, {"url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\n\nWhile running the self-tests on a KASAN enabled kernel, I observed a\nslab-out-of-bounds splat very similar to the one reported in\ncommit 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in\n fib6_nh_flush_exceptions\").\n\nWe additionally need to take care of fib6_metrics initialization\nfailure when the caller provides an nh.\n\nThe fix is similar, explicitly free the route instead of calling\nfib6_info_release on a half-initialized object."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.136", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.54", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13.6", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.14", "versionStartIncluding": "5.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:51:39.040Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47291", "state": "PUBLISHED", "dateUpdated": "2026-05-11T13:51:39.040Z", "dateReserved": "2024-05-21T13:27:52.130Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:35:16.071Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CF5BD040-953A-4682-81D2-AC87F815A1D6", "versionEndExcluding": "5.4.136", "versionStartIncluding": "5.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1BD5A2EE-859F-40FC-BDAC-167AAE37C870", "versionEndExcluding": "5.10.54", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "512C22FC-1524-4E6F-9E62-4F4B7B6E0576", "versionEndExcluding": "5.13.6", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*", "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*", "matchCriteriaId": "23B9E5C6-FAB5-4A02-9E39-27C8787B0991", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\n\nWhile running the self-tests on a KASAN enabled kernel, I observed a\nslab-out-of-bounds splat very similar to the one reported in\ncommit 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in\n fib6_nh_flush_exceptions\").\n\nWe additionally need to take care of fib6_metrics initialization\nfailure when the caller provides an nh.\n\nThe fix is similar, explicitly free the route instead of calling\nfib6_info_release on a half-initialized object."}, {"lang": "es", "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ipv6: corrige otra slab fuera de los l\u00edmites en fib6_nh_flush_exceptions. Mientras ejecutaba las autopruebas en un kernel habilitado para KASAN, observ\u00e9 una slab fuera de los l\u00edmites muy similar al informado en la confirmaci\u00f3n 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions\"). Adem\u00e1s, debemos ocuparnos del error de inicializaci\u00f3n de fib6_metrics cuando la persona que llama proporciona un nh. La soluci\u00f3n es similar: libera expl\u00edcitamente la ruta en lugar de llamar a fib6_info_release en un objeto medio inicializado."}], "id": "CVE-2021-47291", "lastModified": "2024-12-23T16:47:57.030", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-21T15:15:17.100", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/115784bcccf135c3a3548098153413d76f16aae0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/830251361425c5be044db4d826aaf304ea3d14c6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8fb4792f091e608a0a1d353dfdf07ef55a719db5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce8fafb68051fba52546f8bbe8621f7641683680"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions", "id": "2282506", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282506"}, "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-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions\nWhile running the self-tests on a KASAN enabled kernel, I observed a\nslab-out-of-bounds splat very similar to the one reported in\ncommit 821bbf79fe46 (\"ipv6: Fix KASAN: slab-out-of-bounds Read in\nfib6_nh_flush_exceptions\").\nWe additionally need to take care of fib6_metrics initialization\nfailure when the caller provides an nh.\nThe fix is similar, explicitly free the route instead of calling\nfib6_info_release on a half-initialized object."], "name": "CVE-2021-47291", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47291\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47291\nhttps://lore.kernel.org/linux-cve-announce/2024052123-CVE-2021-47291-8eb9@gregkh/T"], "threat_severity": "Low"}

{}