ghsa-9598-2w9x-r9v4
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
lib: cpu_rmap: Avoid use after free on rmap->obj array entries
When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free.
Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap().
The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.
{
"affected": [],
"aliases": [
"CVE-2023-53484"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-01T12:15:51Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries\n\nWhen calling irq_set_affinity_notifier() with NULL at the notify\nargument, it will cause freeing of the glue pointer in the\ncorresponding array entry but will leave the pointer in the array. A\nsubsequent call to free_irq_cpu_rmap() will try to free this entry again\nleading to possible use after free.\n\nFix that by setting NULL to the array entry and checking that we have\nnon-zero at the array entry when iterating over the array in\nfree_irq_cpu_rmap().\n\nThe current code does not suffer from this since there are no cases\nwhere irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the\nnotify arg) is called, followed by a call to free_irq_cpu_rmap() so we\ndon\u0027t hit and issue. Subsequent patches in this series excersize this\nflow, hence the required fix.",
"id": "GHSA-9598-2w9x-r9v4",
"modified": "2025-10-01T12:30:30Z",
"published": "2025-10-01T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53484"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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