GHSA-9HPV-5PC5-WF9W
Vulnerability from github – Published: 2026-08-15 15:30 – Updated: 2026-08-19 18:32In the Linux kernel, the following vulnerability has been resolved:
i2c: imx: Cancel hrtimer before clearing slave pointer
In i2c_imx_unreg_slave(), the slave pointer is set to NULL after disabling interrupts. However, a pending interrupt might already have started the hrtimer (i2c_imx_slave_timeout) before the pointer was cleared. If the hrtimer fires after i2c_imx->slave is set to NULL, the timer callback i2c_imx_slave_finish_op() will call i2c_imx_slave_event() with a NULL slave pointer, which results in a use-after-free / NULL pointer dereference.
Fix by canceling the hrtimer and waiting for it to complete after disabling interrupts, before clearing the slave pointer.
{
"affected": [],
"aliases": [
"CVE-2026-74461"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T13:17:50Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: imx: Cancel hrtimer before clearing slave pointer\n\nIn i2c_imx_unreg_slave(), the slave pointer is set to NULL after\ndisabling interrupts. However, a pending interrupt might already\nhave started the hrtimer (i2c_imx_slave_timeout) before the pointer\nwas cleared. If the hrtimer fires after i2c_imx-\u003eslave is set to\nNULL, the timer callback i2c_imx_slave_finish_op() will call\ni2c_imx_slave_event() with a NULL slave pointer, which results in a\nuse-after-free / NULL pointer dereference.\n\nFix by canceling the hrtimer and waiting for it to complete after\ndisabling interrupts, before clearing the slave pointer.",
"id": "GHSA-9hpv-5pc5-wf9w",
"modified": "2026-08-19T18:32:28Z",
"published": "2026-08-15T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74461"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/470fe15fb3bb2eba6629be301ca7e991ee3cfb7e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/753060f2b77ff2f386addbd3ecadb95b9f90cddd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8a1f9ac3d763e721586f15479ef9140b216ddf3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/affd62f5719a78135b7441aa49c8cab3c3b5e838"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dab4762ee7f3fd0a01980d5407ba48d0261d3bff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e3da77bdb4015051656bb472c295656bbea03b6f"
}
],
"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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