GHSA-RGJV-6VW7-QF84
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()
qla2x00_error_entry() reads ha->req_q_map[que] twice: once for the NULL check and again when assigning it to req. The map slot is cleared by qla25xx_free_req_que() (ha->req_q_map[que_id] = NULL under mq_lock) during queue teardown, while the response-queue interrupt that drives qla2x00_error_entry() is still registered (the IRQ is released later in qla25xx_free_rsp_que()). If the slot is set to NULL between the two reads, req becomes NULL and is dereferenced.
Read the slot once into req and NULL-check the local before use. mq_lock is a mutex and cannot be taken from interrupt context, so the single read plus local check is the appropriate fix for the reported NULL dereference.
{
"affected": [],
"aliases": [
"CVE-2026-89845"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:51Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Avoid req_q_map double-read in qla2x00_error_entry()\n\nqla2x00_error_entry() reads ha-\u003ereq_q_map[que] twice: once for the NULL\ncheck and again when assigning it to req. The map slot is cleared by\nqla25xx_free_req_que() (ha-\u003ereq_q_map[que_id] = NULL under mq_lock)\nduring queue teardown, while the response-queue interrupt that drives\nqla2x00_error_entry() is still registered (the IRQ is released later in\nqla25xx_free_rsp_que()). If the slot is set to NULL between the two\nreads, req becomes NULL and is dereferenced.\n\nRead the slot once into req and NULL-check the local before use. mq_lock\nis a mutex and cannot be taken from interrupt context, so the single\nread plus local check is the appropriate fix for the reported NULL\ndereference.",
"id": "GHSA-rgjv-6vw7-qf84",
"modified": "2026-09-16T12:30:38Z",
"published": "2026-09-16T12:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89845"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1b995cf4157465357d66ba096e7cdaafab9972e7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c90b74e484ba48f31944fe04963d99e01ac3767"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35124cfa9898b2088ee72859e573e0876aff66fc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5dd9bec8004ba93cee8b689bf54ce294f59e5e3c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c845f2597787ef70159a32566669e308b2807a56"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d79376fbd2a076de82c1cd8aa0b600b300c75a44"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/deb8abde83a799d2501f3977f6d6051000253f5e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fe04b31e386aee4cc3a18f07462af146037dc389"
}
],
"schema_version": "1.4.0",
"severity": []
}
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