Medium
Security advisory
A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-1983
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 08:38 UTC · Revision 1
Source evidence
A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.
osv:CVE-2020-1983
Complete source record
{
"id": "746b920087fcfa49f87bc1debe99ae3c72c6c60044dbf5d2a6a07d165e4b4172",
"url": "https://osv.dev/vulnerability/CVE-2020-1983",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-1983",
"summary": "A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.",
"evidence": "osv:CVE-2020-1983",
"products": [],
"severity": "medium",
"structured": {
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"aliases": [
"CVE-2020-1983"
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"metrics": [
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],
"modified": "2026-10-24T10:47:49.569240400Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/",
"https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html",
"https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html",
"https://usn.ubuntu.com/4372-1/",
"https://www.debian.org/security/2020/dsa-4665",
"https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04",
"https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20"
],
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{
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},
"related_cves": [
{
"value": "CVE-2020-1983",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 441574,
"published_at": "2020-04-22T20:15:11.48+00:00"
}