GHSA-87W2-PJWV-62X9
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33In the Linux kernel, the following vulnerability has been resolved:
octeontx2-af: fix VF bringup affecting PF promiscuous state
Mbox handling of nix_set_rx_mode for a VF with promiscuous and all_multi flags set to false causes deletion of the PF's promiscuous and allmulti MCAM rules. This occurs because the APIs that enable/disable these rules operate only on the PF, even when the mbox request is made via a VF interface.
Guard both rvu_npc_enable_allmulti_entry() and rvu_npc_enable_promisc_entry() disable paths with an is_vf() check so that a VF bringing up or tearing down its interface cannot inadvertently clear the PF's MCAM rules.
{
"affected": [],
"aliases": [
"CVE-2026-72312"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T06:22:04Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: fix VF bringup affecting PF promiscuous state\n\nMbox handling of nix_set_rx_mode for a VF with promiscuous and\nall_multi flags set to false causes deletion of the PF\u0027s promiscuous\nand allmulti MCAM rules. This occurs because the APIs that\nenable/disable these rules operate only on the PF, even when the\nmbox request is made via a VF interface.\n\nGuard both rvu_npc_enable_allmulti_entry() and\nrvu_npc_enable_promisc_entry() disable paths with an is_vf() check so\nthat a VF bringing up or tearing down its interface cannot inadvertently\nclear the PF\u0027s MCAM rules.",
"id": "GHSA-87w2-pjwv-62x9",
"modified": "2026-08-17T06:33:23Z",
"published": "2026-08-15T06:32:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72312"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/212c59e5e416859579272288fd325148fc316109"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3cf83432e0561aef6d7ec2664909d12d0ff0ffc1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3de77d2f34c2bc2acaedabc2c5e0a561b85c283a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/53e17d9ed779ad25870abb9c31bc294c71a2278c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/daa2451640a3e0727fd598f5c2ccb8bb4d5a8b9c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fabb881df322da25442f98d23f5fa371e3c78ec4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H",
"type": "CVSS_V3"
}
]
}
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