CVE-2024-27414

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However, this adjustment\nremoved the `break` statement and led to an error logic of the flags\nwriting back at the end of this function.\n\nif (have_flags)\n memcpy(nla_data(attr), &flags, sizeof(flags));\n // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\n\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\nHowever, this is not necessarily true fow now as the updated loop will let\nthe attr point to the last NLA, even an invalid NLA which could cause\noverflow writes.\n\nThis patch introduces a new variable `br_flag` to save the NLA pointer\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\nerror logic."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached via an RTM_SETLINK rtnetlink message over an AF_NETLINK socket, a local kernel interface with no remote or adjacent-network exposure.\nAC:L - The attacker fully controls the netlink message and its nested IFLA_AF_SPEC attributes, so crafting the layout that makes the final attr point out of bounds and triggering the memcpy write is fully reliable.\nPR:L - RTM_SETLINK requires CAP_NET_ADMIN checked against the net namespace's user_ns (netlink_net_capable), which an unprivileged user obtains via unshare -Urn.\nUI:N - The attacker triggers the flaw entirely by sending its own netlink message; no action by any other user is required.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same kernel security authority; no VM/sandbox/IOMMU boundary is crossed.\nC:H - The out-of-bounds heap write is memory corruption adjacent to the netlink buffer that can be leveraged to corrupt neighboring structures (length/pointer fields) toward information disclosure.\nI:H - This is a controlled out-of-bounds heap write (memory corruption), which under kernel guidance maps to High integrity impact.\nA:H - An out-of-bounds write into kernel heap memory can corrupt adjacent objects and cause an oops/panic, giving High availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/rtnetlink.c"], "versions": [{"version": "ad46d4861ed36315d3d9e838723ba3e367ecc042", "lessThan": "b9fbc44159dfc3e9a7073032752d9e03f5194a6f", "status": "affected", "versionType": "git"}, {"version": "abb0172fa8dc4a4ec51aa992b7269ed65959f310", "lessThan": "882a51a10ecf24ce135d573afa0872aef02c5125", "status": "affected", "versionType": "git"}, {"version": "047508edd602921ee8bb0f2aa2100aa2e9bedc75", "lessThan": "a1227b27fcccc99dc44f912b479e01a17e2d7d31", "status": "affected", "versionType": "git"}, {"version": "8dfac8071d58447e5cace4c4c6fe493ce2f615f6", "lessThan": "f2261eb994aa5757c1da046b78e3229a3ece0ad9", "status": "affected", "versionType": "git"}, 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no action by any other user is required.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same kernel security authority; no VM/sandbox/IOMMU boundary is crossed.\nC:H - The out-of-bounds heap write is memory corruption adjacent to the netlink buffer that can be leveraged to corrupt neighboring structures (length/pointer fields) toward information disclosure.\nI:H - This is a controlled out-of-bounds heap write (memory corruption), which under kernel guidance maps to High integrity impact.\nA:H - An out-of-bounds write into kernel heap memory can corrupt adjacent objects and cause an oops/panic, giving High availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ad46d4861ed36315d3d9e838723ba3e367ecc042", "lessThan": "b9fbc44159dfc3e9a7073032752d9e03f5194a6f", "versionType": "git"}, {"status": "affected", "version": "abb0172fa8dc4a4ec51aa992b7269ed65959f310", "lessThan": "882a51a10ecf24ce135d573afa0872aef02c5125", "versionType": "git"}, {"status": "affected", "version": "047508edd602921ee8bb0f2aa2100aa2e9bedc75", "lessThan": "a1227b27fcccc99dc44f912b479e01a17e2d7d31", "versionType": "git"}, {"status": "affected", "version": "8dfac8071d58447e5cace4c4c6fe493ce2f615f6", "lessThan": "f2261eb994aa5757c1da046b78e3229a3ece0ad9", "versionType": "git"}, {"status": "affected", "version": "d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f", "lessThan": "167d8642daa6a44b51de17f8ff0f584e1e762db7", "versionType": "git"}, {"status": "affected", "version": "d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f", "lessThan": "831bc2728fb48a8957a824cba8c264b30dca1425", "versionType": "git"}, {"status": "affected", "version": "d73ef2d69c0dba5f5a1cb9600045c873bab1fb7f", "lessThan": "743ad091fb46e622f1b690385bb15e3cd3daf874", "versionType": "git"}, {"status": "affected", "version": "00757f58e37b2d9a6f99e15be484712390cd2bab", "versionType": "git"}, {"status": "affected", "version": "5.4.253", "lessThan": "5.4.271", "versionType": "semver"}, {"status": "affected", "version": "5.10.190", "lessThan": "5.10.212", "versionType": "semver"}, {"status": "affected", "version": "5.15.126", "lessThan": "5.15.151", "versionType": "semver"}, {"status": "affected", "version": "6.1.45", "lessThan": "6.1.81", "versionType": "semver"}, {"status": "affected", "version": "6.4.10", "lessThan": "6.5", "versionType": "semver"}], "programFiles": ["net/core/rtnetlink.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.5"}, {"status": "unaffected", "version": "0", "lessThan": "6.5", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.271", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.212", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.151", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.81", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.21", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.9", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/core/rtnetlink.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f"}, {"url": "https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125"}, {"url": "https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31"}, {"url": "https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9"}, {"url": "https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7"}, {"url": "https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425"}, {"url": "https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back\n\nIn the commit d73ef2d69c0d (\"rtnetlink: let rtnl_bridge_setlink checks\nIFLA_BRIDGE_MODE length\"), an adjustment was made to the old loop logic\nin the function `rtnl_bridge_setlink` to enable the loop to also check\nthe length of the IFLA_BRIDGE_MODE attribute. However, this adjustment\nremoved the `break` statement and led to an error logic of the flags\nwriting back at the end of this function.\n\nif (have_flags)\n memcpy(nla_data(attr), &flags, sizeof(flags));\n // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\n\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\nHowever, this is not necessarily true fow now as the updated loop will let\nthe attr point to the last NLA, even an invalid NLA which could cause\noverflow writes.\n\nThis patch introduces a new variable `br_flag` to save the NLA pointer\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\nerror logic."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.271", "versionStartIncluding": "5.4.253"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.212", "versionStartIncluding": "5.10.190"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.151", "versionStartIncluding": "5.15.126"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.81", "versionStartIncluding": "6.1.45"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.21", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.9", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "6.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.4.10"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:29:43.204Z"}}}, "cveMetadata": {"cveId": "CVE-2024-27414", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:29:43.204Z", "dateReserved": "2024-02-25T13:47:42.682Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-17T11:50:57.207Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back\n\nIn the commit d73ef2d69c0d (\"rtnetlink: let rtnl_bridge_setlink checks\nIFLA_BRIDGE_MODE length\"), an adjustment was made to the old loop logic\nin the function `rtnl_bridge_setlink` to enable the loop to also check\nthe length of the IFLA_BRIDGE_MODE attribute. However, this adjustment\nremoved the `break` statement and led to an error logic of the flags\nwriting back at the end of this function.\n\nif (have_flags)\n memcpy(nla_data(attr), &flags, sizeof(flags));\n // attr should point to IFLA_BRIDGE_FLAGS NLA !!!\n\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\nHowever, this is not necessarily true fow now as the updated loop will let\nthe attr point to the last NLA, even an invalid NLA which could cause\noverflow writes.\n\nThis patch introduces a new variable `br_flag` to save the NLA pointer\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\nerror logic."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtnetlink: corrige la l\u00f3gica de error de la reescritura de IFLA_BRIDGE_FLAGS En el commit d73ef2d69c0d (\"rtnetlink: let rtnl_bridge_setlink comprueba la longitud de IFLA_BRIDGE_MODE\"), se realiz\u00f3 un ajuste a la l\u00f3gica de bucle anterior en la funci\u00f3n ` rtnl_bridge_setlink` para permitir que el bucle tambi\u00e9n verifique la longitud del atributo IFLA_BRIDGE_MODE. Sin embargo, este ajuste elimin\u00f3 la declaraci\u00f3n \"break\" y gener\u00f3 una l\u00f3gica de error en la escritura de los indicadores al final de esta funci\u00f3n. if (have_flags) memcpy(nla_data(attr), &flags, sizeof(flags)); // attr deber\u00eda apuntar a IFLA_BRIDGE_FLAGS NLA !!! Antes de la confirmaci\u00f3n mencionada, se concede que el `attr` sea IFLA_BRIDGE_FLAGS. Sin embargo, esto no es necesariamente cierto ahora, ya que el bucle actualizado permitir\u00e1 que el atributo apunte al \u00faltimo NLA, incluso un NLA no v\u00e1lido que podr\u00eda causar escrituras desbordadas. Este parche introduce una nueva variable `br_flag` para guardar el puntero NLA que apunta a IFLA_BRIDGE_FLAGS y lo usa para resolver la l\u00f3gica de error mencionada."}], "id": "CVE-2024-27414", "lastModified": "2026-08-04T11:17:48.310", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-27414", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-21T15:56:59.979228Z", "version": "2.0.3"}}]}, "published": "2024-05-17T12:15:12.673", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/167d8642daa6a44b51de17f8ff0f584e1e762db7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/743ad091fb46e622f1b690385bb15e3cd3daf874"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/831bc2728fb48a8957a824cba8c264b30dca1425"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/882a51a10ecf24ce135d573afa0872aef02c5125"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a1227b27fcccc99dc44f912b479e01a17e2d7d31"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9fbc44159dfc3e9a7073032752d9e03f5194a6f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2261eb994aa5757c1da046b78e3229a3ece0ad9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: rtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back", "id": "2281103", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281103"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nrtnetlink: fix error logic of IFLA_BRIDGE_FLAGS writing back\nIn the commit d73ef2d69c0d (\"rtnetlink: let rtnl_bridge_setlink checks\nIFLA_BRIDGE_MODE length\"), an adjustment was made to the old loop logic\nin the function `rtnl_bridge_setlink` to enable the loop to also check\nthe length of the IFLA_BRIDGE_MODE attribute. However, this adjustment\nremoved the `break` statement and led to an error logic of the flags\nwriting back at the end of this function.\nif (have_flags)\nmemcpy(nla_data(attr), &flags, sizeof(flags));\n// attr should point to IFLA_BRIDGE_FLAGS NLA !!!\nBefore the mentioned commit, the `attr` is granted to be IFLA_BRIDGE_FLAGS.\nHowever, this is not necessarily true fow now as the updated loop will let\nthe attr point to the last NLA, even an invalid NLA which could cause\noverflow writes.\nThis patch introduces a new variable `br_flag` to save the NLA pointer\nthat points to IFLA_BRIDGE_FLAGS and uses it to resolve the mentioned\nerror logic."], "name": "CVE-2024-27414", "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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-27414\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-27414\nhttps://lore.kernel.org/linux-cve-announce/2024051702-CVE-2024-27414-5c5d@gregkh/T"], "threat_severity": "Low"}

{}