Medium
Security advisory
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-7039
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:18 UTC · Revision 1
Source evidence
tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.
osv:CVE-2020-7039
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2020-7039",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-7039",
"summary": "tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.",
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"modified": "2026-10-24T14:12:07.269820110Z",
"provider": "osv",
"references": [
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"source_id": "core-osv",
"document_id": 443323,
"published_at": "2020-01-16T23:15:12.19+00:00"
}