GHSA-22QV-H2JQ-2XCF
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31In the Linux kernel, the following vulnerability has been resolved:
nexthop: Initialize extack in remove_nh_grp_entry()
remove_nh_grp_entry() prints the extack message when a listener fails to replace the reduced nexthop group. However, extack is not initialized and listeners are not required to set a message when returning an error. Neither netdevsim nor mlxsw do so when an allocation fails, resulting in the dereference of an uninitialized stack pointer.
Fix by zero-initializing extack, as was done in commit 6347c5314cee ("nexthop: initialize extack in nh_res_bucket_migrate()").
{
"affected": [],
"aliases": [
"CVE-2026-98031"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-25T11:17:31Z",
"severity": null
},
"details": "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": "GHSA-22qv-h2jq-2xcf",
"modified": "2026-09-25T12:31:34Z",
"published": "2026-09-25T12:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98031"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/030c878eaedf0449e2b5401a0a0146d0afcc645e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5bd9e4e7cdaa03879e9b73b12ab52cceb1edd55b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d643cea4248668dc493c513aa7cbc6505eb1a4a9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d80677ad7aa5bebfccfd58caa4852b65abe70561"
}
],
"schema_version": "1.4.0",
"severity": []
}
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