GHSA-MQWH-WX53-VXJ4
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In the Linux kernel, the following vulnerability has been resolved:
cpufreq: imx6q: fix out-of-bounds write when probed more than once
imx6_soc_volt is allocated fresh on every probe, sized to the number of ARM OPPs:
imx6_soc_volt = devm_kcalloc(cpu_dev, num, sizeof(*imx6_soc_volt),
GFP_KERNEL);
but it is filled through soc_opp_count, which has static storage and is never reset. A second bind after an unbind keeps indexing from where the first one stopped, and writes past the end of the new array.
Unbinding and rebinding the driver on qemu's mcimx6ul-evk, under KASAN:
BUG: KASAN: slab-out-of-bounds in imx6q_cpufreq_probe+0x3b0/0xa34 Write of size 4 at addr c5e90480 by task binder/73 imx6q_cpufreq_probe from platform_probe+0x88/0xe4 platform_probe from really_probe+0x108/0x384 bind_store from kernfs_fop_write_iter+0x1b4/0x28c
The write lands one u32 past the end of the allocation.
soc_opp_count is only read a few lines below the loop that fills it, so it never needed static storage. Make it a local.
{
"affected": [],
"aliases": [
"CVE-2026-90295"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:26Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: imx6q: fix out-of-bounds write when probed more than once\n\nimx6_soc_volt is allocated fresh on every probe, sized to the number of\nARM OPPs:\n\n\timx6_soc_volt = devm_kcalloc(cpu_dev, num, sizeof(*imx6_soc_volt),\n\t\t\t\t GFP_KERNEL);\n\nbut it is filled through soc_opp_count, which has static storage and is\nnever reset. A second bind after an unbind keeps indexing from where the\nfirst one stopped, and writes past the end of the new array.\n\nUnbinding and rebinding the driver on qemu\u0027s mcimx6ul-evk, under KASAN:\n\n BUG: KASAN: slab-out-of-bounds in imx6q_cpufreq_probe+0x3b0/0xa34\n Write of size 4 at addr c5e90480 by task binder/73\n imx6q_cpufreq_probe from platform_probe+0x88/0xe4\n platform_probe from really_probe+0x108/0x384\n bind_store from kernfs_fop_write_iter+0x1b4/0x28c\n\nThe write lands one u32 past the end of the allocation.\n\nsoc_opp_count is only read a few lines below the loop that fills it, so it\nnever needed static storage. Make it a local.",
"id": "GHSA-mqwh-wx53-vxj4",
"modified": "2026-09-17T18:31:59Z",
"published": "2026-09-17T18:31:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90295"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/263a35331169390f7f9ccb51d74e668610199af4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/49f2f9b1d0cc76cf221306fc707703205bd27073"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/55516986a3d81325c84f2d4ae9cd03116bc63599"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/55864b26c22cbd4b2e0d36154a8c35931c2e133b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c3afcf27fa4582c1ab912503dc8a4ebb8dc0f82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aaa66e60c0e21d19993a95bc3718dc29eb2d3192"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b166bb79b7ef36b4f1d6d1f40d1a72b2eb0a56b9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c5135bc34ea37e9d19f758e61ac44415afb3891a"
}
],
"schema_version": "1.4.0",
"severity": []
}
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