linux — security advisory
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.
- Products
- linux
- Affected versions
- 6.1.27-1
- Fixed versions
- 6.1.37-1, 6.3.7-1
- CVEs
- CVE-2023-53484
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 16:22 UTC · Revision 1
Source evidence
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.
osv:DEBIAN-CVE-2023-53484
linux
Fixed versions: 6.1.37-1
linux
Fixed versions: 6.3.7-1
linux
Fixed versions: 6.3.7-1
Complete source record
{
"id": "e0613c6a1b516102f4055e6256422e408cd92f084f6e86698f28c531f2a3e84d",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-53484",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-53484",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2023-53484",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
},
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"evidence": "/affected/0/ranges"
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"evidence": "/affected/0/versions"
}
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"aliases": [
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"metrics": [
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"type": "CVSS_V3",
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}
],
"affected": [
{
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"ecosystem": "Debian:12"
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"versions": [
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"database_specific": {
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{
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"package": {
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"ecosystem": "Debian:13"
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"database_specific": {
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"package": {
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"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53484.json"
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"ecosystem_specific": {
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}
}
],
"modified": "2026-10-26T18:03:04.363045631Z",
"provider": "osv",
"upstream": [
"CVE-2023-53484"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-53484"
]
},
"related_cves": [
{
"value": "CVE-2023-53484",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 457526,
"published_at": "2025-10-01T12:15:51.18+00:00"
}