{"id":"CVE-2026-98031","title":"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","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 < 030c878eaedf0449e2b5401a0a0146d0afcc645e","Linux >= 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 < d643cea4248668dc493c513aa7cbc6505eb1a4a9","Linux >= 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 < d80677ad7aa5bebfccfd58caa4852b65abe70561","Linux >= 833a1065eeb14437a9a0dfa9dad06ea09894e0b5 < 5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b","Linux 5.11"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:31.787","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98031","references":[{"url":"https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.852Z","slug":"CVE-2026-98031","body":"## Overview\n\nIn 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()\").\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}