linux — security advisory
In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv
- Products
- linux
- Affected versions
- 6.1.27-1, 6.1.37-1, 6.1.38-1, 6.1.38-2, 6.1.38-2~bpo11+1, 6.1.38-3, 6.1.38-4, 6.1.38-4~bpo11+1, 6.1.52-1, 6.1.55-1, 6.1.55-1~bpo11+1
- Fixed versions
- 6.1.64-1, 6.6.8-1
- CVEs
- CVE-2023-52847
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 16:13 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv
osv:DEBIAN-CVE-2023-52847
linux
Fixed versions: 6.1.64-1
linux
Fixed versions: 6.6.8-1
linux
Fixed versions: 6.6.8-1
Complete source record
{
"id": "345621841f0ab7349ef66fa73c2548457f6b8a980af937855b92c16f59404259",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-52847",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2023-52847",
"summary": "In the Linux kernel, the following vulnerability has been resolved: media: bttv: fix use after free error due to btv->timeout timer There may be some a race condition between timer function bttv_irq_timeout and bttv_remove. The timer is setup in probe and there is no timer_delete operation in remove function. When it hit kfree btv, the function might still be invoked, which will cause use after free bug. This bug is found by static analysis, it may be false positive. Fix it by adding del_timer_sync invoking to the remove function. cpu0 cpu1 bttv_probe ->timer_setup ->bttv_set_dma ->mod_timer; bttv_remove ->kfree(btv); ->bttv_irq_timeout ->USE btv",
"evidence": "osv:DEBIAN-CVE-2023-52847",
"products": [
{
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"evidence": "/affected/0/package/name"
},
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},
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{
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],
"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
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}
],
"affected": [
{
"ranges": [
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],
"package": {
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"ecosystem": "Debian:12"
},
"versions": [
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"6.1.38-3",
"6.1.38-4",
"6.1.38-4~bpo11+1",
"6.1.52-1",
"6.1.55-1",
"6.1.55-1~bpo11+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52847.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
"fixed": "6.6.8-1"
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}
],
"package": {
"name": "linux",
"purl": "pkg:deb/debian/linux?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52847.json"
},
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},
{
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"package": {
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},
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T18:02:51.233312891Z",
"provider": "osv",
"upstream": [
"CVE-2023-52847"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2023-52847"
]
},
"related_cves": [
{
"value": "CVE-2023-52847",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 457022,
"published_at": "2024-05-21T16:15:21.873+00:00"
}