GHSA-4P37-9V73-JM8H
Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-08-23 15:32In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix linked reg delta tracking when src_reg == dst_reg
Consider the case of rX += rX where src_reg and dst_reg are pointers to the same bpf_reg_state in adjust_reg_min_max_vals(). The latter first modifies the dst_reg in-place, and later in the delta tracking, the subsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the post-{add,sub} value instead of the original source.
This is problematic since it sets an incorrect delta, which sync_linked_regs() then propagates to linked registers, thus creating a verifier-vs-runtime mismatch. Fix it by just skipping this corner case.
{
"affected": [],
"aliases": [
"CVE-2026-53092"
],
"database_specific": {
"cwe_ids": [
"CWE-393"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-24T17:17:23Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix linked reg delta tracking when src_reg == dst_reg\n\nConsider the case of rX += rX where src_reg and dst_reg are pointers to\nthe same bpf_reg_state in adjust_reg_min_max_vals(). The latter first\nmodifies the dst_reg in-place, and later in the delta tracking, the\nsubsequent is_reg_const(src_reg)/reg_const_value(src_reg) reads the\npost-{add,sub} value instead of the original source.\n\nThis is problematic since it sets an incorrect delta, which sync_linked_regs()\nthen propagates to linked registers, thus creating a verifier-vs-runtime\nmismatch. Fix it by just skipping this corner case.",
"id": "GHSA-4p37-9v73-jm8h",
"modified": "2026-08-23T15:32:54Z",
"published": "2026-06-24T18:32:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53092"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-53092"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492362"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1509c1ae9185ec7103899967ed788b6eebab3fcc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc86a8b0a1c54d2bccf6f68cf49b82dea91b84de"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d7f14173c0d5866c3cae759dee560ad1bed10d2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d88e8e4a3b52bd5b2ff3eceba4b29d1b5506d066"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53092.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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