{"id":"CVE-2026-98031","revision":"b13b0130a5bc4287a7a12be287143df2","records":[{"revision":"b13b0130a5bc4287a7a12be287143df2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98031","aliases":[],"title":"nexthop: Initialize extack in remove_nh_grp_entry()","description":"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()\").","state":0,"publishedAt":"2026-09-25T10:23:47.562+00:00","modifiedAt":"2026-10-19T09:12:36.306+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/nexthop.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"35d9ec61466109ef0c2de87067338d929f629527\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"704319510af2179cf03955747d714ab291075c25\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"030c878eaedf0449e2b5401a0a0146d0afcc645e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"d643cea4248668dc493c513aa7cbc6505eb1a4a9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"d80677ad7aa5bebfccfd58caa4852b65abe70561\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"833a1065eeb14437a9a0dfa9dad06ea09894e0b5\",\n                            \"lessThan\": \"5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv4/nexthop.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/35d9ec61466109ef0c2de87067338d929f629527","https://git.kernel.org/stable/c/704319510af2179cf03955747d714ab291075c25","https://git.kernel.org/stable/c/17acbcd4c5a6ca3dd3f9e52eb203c9175bde609a","https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e","https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9","https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561","https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98031","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98031","identifiers":["CVE-2026-98031"]},"retained":false,"historicalAffected":[]}],"coverage":[]}