GHSA-VFMM-VGXH-2C77
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 15:30In the Linux kernel, the following vulnerability has been resolved:
drm/panthor: harden firmware build-info bounds checks
panthor_fw_read_build_info() checks whether the metadata range fits in the firmware image with hdr.meta_start + hdr.meta_size. Both fields are u32, so the addition can wrap and let an out-of-bounds range pass validation.
The function also reads the "git_sha: " prefix without first checking that the metadata is long enough, and meta_size == 0 can underflow the NULL terminator index.
Use subtraction-based bounds checking and reject metadata that is too short to contain the expected prefix and trailing NULL byte.
{
"affected": [],
"aliases": [
"CVE-2026-89826"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:49Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: harden firmware build-info bounds checks\n\npanthor_fw_read_build_info() checks whether the metadata range fits in the\nfirmware image with hdr.meta_start + hdr.meta_size. Both fields are u32, so\nthe addition can wrap and let an out-of-bounds range pass validation.\n\nThe function also reads the \"git_sha: \" prefix without first checking that\nthe metadata is long enough, and meta_size == 0 can underflow the NULL\nterminator index.\n\nUse subtraction-based bounds checking and reject metadata that is too short\nto contain the expected prefix and trailing NULL byte.",
"id": "GHSA-vfmm-vgxh-2c77",
"modified": "2026-09-16T15:30:58Z",
"published": "2026-09-16T12:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89826"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5516f1acfd07564361cf306cc90a8e513df0f096"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ae19dce3e8c13ae73590b3f4311abe9f96bbae8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8321b093fa6c297b80586460ce6914d9655df170"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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