GHSA-9537-HF5Q-V67H
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31In the Linux kernel, the following vulnerability has been resolved:
eth: nfp: drop the replaced rule from the list when reprogramming fails
nfp_net_fs_add() replaces an existing rule by deleting it from the hardware, decrementing nn->fs.count and programming the new one. If nfp_net_fs_add_hw() fails the old entry stays on nn->fs.list - only the success path reaches list_replace() - so the list is one longer than nn->fs.count, and it advertises a rule whose hardware entry has already been torn down.
nn->fs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes its buffer one entry short of what the GRXCLSRLALL walk wants to write. That used to overwrite one u32 past the allocation; since the walk is bounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the counter.
{
"affected": [],
"aliases": [
"CVE-2026-98028"
],
"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\neth: nfp: drop the replaced rule from the list when reprogramming fails\n\nnfp_net_fs_add() replaces an existing rule by deleting it from the\nhardware, decrementing nn-\u003efs.count and programming the new one. If\nnfp_net_fs_add_hw() fails the old entry stays on nn-\u003efs.list - only the\nsuccess path reaches list_replace() - so the list is one longer than\nnn-\u003efs.count, and it advertises a rule whose hardware entry has already\nbeen torn down.\n\nnn-\u003efs.count is what ETHTOOL_GRXCLSRLCNT reports, so userspace then sizes\nits buffer one entry short of what the GRXCLSRLALL walk wants to write.\nThat used to overwrite one u32 past the allocation; since the walk is\nbounded it is a permanent -EMSGSIZE instead, as nothing ever resyncs the\ncounter.",
"id": "GHSA-9537-hf5q-v67h",
"modified": "2026-09-25T12:31:34Z",
"published": "2026-09-25T12:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98028"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/108bb2142e3a12c9ad625ad662973127a113ddc6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/552e528a7d85cbe088b2ae4f78194713975b46cf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/603b70093f729f52a37544b48679903cad834856"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/edaec279f59f801a05b751df475ed71a0a68c88a"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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