GHSA-5WX6-43WW-FW3M
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In the Linux kernel, the following vulnerability has been resolved:
octeontx2-pf: fix NULL deref of af_xdp_zc_qidx on rep setup
af_xdp_zc_qidx tracks receive queues using AF_XDP zero-copy and is allocated during PF/VF probe. Representors and other non-AF_XDP paths leave the pointer NULL, but several call sites used test_bit() on it unconditionally.
Switching to devlink eswitch mode creates representors and runs otx2_init_hw_resources(), which reaches otx2_pool_aq_init() and oopses when dereferencing the NULL bitmap. Add NULL checks before every af_xdp_zc_qidx test_bit() use in the RSS, ethtool, XSK, and pool init paths.
{
"affected": [],
"aliases": [
"CVE-2026-90080"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:16:57Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: fix NULL deref of af_xdp_zc_qidx on rep setup\n\naf_xdp_zc_qidx tracks receive queues using AF_XDP zero-copy and is\nallocated during PF/VF probe. Representors and other non-AF_XDP paths\nleave the pointer NULL, but several call sites used test_bit() on it\nunconditionally.\n\nSwitching to devlink eswitch mode creates representors and runs\notx2_init_hw_resources(), which reaches otx2_pool_aq_init() and oopses\nwhen dereferencing the NULL bitmap. Add NULL checks before every\naf_xdp_zc_qidx test_bit() use in the RSS, ethtool, XSK, and pool init\npaths.",
"id": "GHSA-5wx6-43ww-fw3m",
"modified": "2026-09-17T18:31:50Z",
"published": "2026-09-17T18:31:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90080"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7e33c6bd049b532d2ec4916895ef07e538bed905"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b003d5b4e46ca5033859db601e12d36da24d0e40"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b09a0503c755b6609fad59a84cc7f05b6843a03c"
}
],
"schema_version": "1.4.0",
"severity": []
}
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