{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98031", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.070Z", "datePublished": "2026-09-25T10:23:47.562Z", "dateUpdated": "2026-10-19T09:12:36.306Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:36.306Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnexthop: Initialize extack in remove_nh_grp_entry()\n\nremove_nh_grp_entry() prints the extack message when a listener fails\nto replace the reduced nexthop group. However, extack is not\ninitialized and listeners are not required to set a message when\nreturning an error. Neither netdevsim nor mlxsw do so when an\nallocation fails, resulting in the dereference of an uninitialized\nstack pointer.\n\nFix by zero-initializing extack, as was done in commit 6347c5314cee\n(\"nexthop: initialize extack in nh_res_bucket_migrate()\")."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/nexthop.c"], "versions": [{"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "35d9ec61466109ef0c2de87067338d929f629527", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "704319510af2179cf03955747d714ab291075c25", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "030c878eaedf0449e2b5401a0a0146d0afcc645e", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "d643cea4248668dc493c513aa7cbc6505eb1a4a9", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "d80677ad7aa5bebfccfd58caa4852b65abe70561", "status": "affected", "versionType": "git"}, {"version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "lessThan": "5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b", "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/ipv4/nexthop.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.11", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/35d9ec61466109ef0c2de87067338d929f629527"}, {"url": "https://git.kernel.org/stable/c/704319510af2179cf03955747d714ab291075c25"}, {"url": "https://git.kernel.org/stable/c/17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a"}, {"url": "https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e"}, {"url": "https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9"}, {"url": "https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561"}, {"url": "https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"}], "title": "nexthop: Initialize extack in remove_nh_grp_entry()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/nexthop.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "35d9ec61466109ef0c2de87067338d929f629527", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "704319510af2179cf03955747d714ab291075c25", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "030c878eaedf0449e2b5401a0a0146d0afcc645e", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "d643cea4248668dc493c513aa7cbc6505eb1a4a9", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "d80677ad7aa5bebfccfd58caa4852b65abe70561", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}, {"lessThan": "5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b", "status": "affected", "version": "833a1065eeb14437a9a0dfa9dad06ea09894e0b5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/nexthop.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"lessThan": "5.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nnexthop: Initialize extack in remove_nh_grp_entry()\n\nremove_nh_grp_entry() prints the extack message when a listener fails\nto replace the reduced nexthop group. However, extack is not\ninitialized and listeners are not required to set a message when\nreturning an error. Neither netdevsim nor mlxsw do so when an\nallocation fails, resulting in the dereference of an uninitialized\nstack pointer.\n\nFix by zero-initializing extack, as was done in commit 6347c5314cee\n(\"nexthop: initialize extack in nh_res_bucket_migrate()\")."}], "id": "CVE-2026-98031", "lastModified": "2026-10-19T10:17:57.120", "metrics": {}, "published": "2026-09-25T11:17:31.787", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/35d9ec61466109ef0c2de87067338d929f629527"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/704319510af2179cf03955747d714ab291075c25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nexthop: Initialize extack in remove_nh_grp_entry()", "id": "2541247", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541247"}, "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:\nnexthop: Initialize extack in remove_nh_grp_entry()\nremove_nh_grp_entry() prints the extack message when a listener fails\nto replace the reduced nexthop group. However, extack is not\ninitialized and listeners are not required to set a message when\nreturning an error. Neither netdevsim nor mlxsw do so when an\nallocation fails, resulting in the dereference of an uninitialized\nstack pointer.\nFix by zero-initializing extack, as was done in commit 6347c5314cee\n(\"nexthop: initialize extack in nh_res_bucket_migrate()\").", "A flaw was found in the Linux kernel. When removing a nexthop routing group entry, an error path fails to properly initialize an error-reporting pointer, causing the kernel to dereference uninitialized stack memory. A local user with network administration privileges could exploit this flaw during memory allocation failures to cause a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98031", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98031\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98031\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98031.mbox"], "threat_severity": "Moderate"}