GHSA-RCXP-8R6G-R5JM
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-13 09:32In the Linux kernel, the following vulnerability has been resolved:
ACPI: APEI: GHES: fix ARM section length accounting after header
In ghes_handle_arm_hw_error(), after skipping the cper_sec_proc_arm header with (err + 1), the remaining length was reduced by sizeof(err) (pointer size) instead of sizeof(*err) (structure size).
That overestimates the bytes left for cper_arm_err_info records and can let the parser read past the CPER section when err_info_num is large enough relative to error_data_length.
Use sizeof(err) so the length accounting matches the pointer advance and the earlier sizeof(err) size check.
{
"affected": [],
"aliases": [
"CVE-2026-89588"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:19:43Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: APEI: GHES: fix ARM section length accounting after header\n\nIn ghes_handle_arm_hw_error(), after skipping the cper_sec_proc_arm\nheader with (err + 1), the remaining length was reduced by sizeof(err)\n(pointer size) instead of sizeof(*err) (structure size).\n\nThat overestimates the bytes left for cper_arm_err_info records and can\nlet the parser read past the CPER section when err_info_num is large\nenough relative to error_data_length.\n\nUse sizeof(*err) so the length accounting matches the pointer advance\nand the earlier sizeof(*err) size check.",
"id": "GHSA-rcxp-8r6g-r5jm",
"modified": "2026-09-13T09:32:19Z",
"published": "2026-09-11T21:31:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89588"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/452eb28e03015abec6d4bf6488ee567706ade4e1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5ff385e9403e87ae33f65b8c38698d3b1e92cfde"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/903308ea40adf0577d82eab69882faf8836326ce"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b48b613073c3d652cb1823c15d16f7067cf4cee4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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