GHSA-77JX-G549-23WH
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-21 15:31In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak
qla2x00_do_dport_diagnostics() allocates the qla_dport_diag response buffer with kmalloc_obj() (non-zeroing) and, on success, copies the full sizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound sg_copy_to_buffer() only fills as many bytes as the user request payload provides, and qla26xx_dport_diagnostics() zeroes only dd->buf. The options and unused[] fields are therefore copied out uninitialized, leaking kernel heap contents to user space.
Allocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().
{
"affected": [],
"aliases": [
"CVE-2026-89859"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:53Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero dport diagnostics buffer to avoid info leak\n\nqla2x00_do_dport_diagnostics() allocates the qla_dport_diag response\nbuffer with kmalloc_obj() (non-zeroing) and, on success, copies the full\nsizeof(*dd) back to user space via sg_copy_from_buffer(). The inbound\nsg_copy_to_buffer() only fills as many bytes as the user request payload\nprovides, and qla26xx_dport_diagnostics() zeroes only dd-\u003ebuf. The\noptions and unused[] fields are therefore copied out uninitialized,\nleaking kernel heap contents to user space.\n\nAllocate with kzalloc_obj(), matching qla2x00_do_dport_diagnostics_v2().",
"id": "GHSA-77jx-g549-23wh",
"modified": "2026-09-21T15:31:43Z",
"published": "2026-09-16T12:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89859"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9fc03be982763a131913f84fe73b240ae45bca37"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a152edab3854f01dd2daf3eaf8f32cbabdb3834e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d6e2411516bb95e52cb74c9c56b60ad2548a2730"
}
],
"schema_version": "1.4.0",
"severity": []
}
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