Medium
upx-ucl — security advisory
A Segmentation fault was found in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.
- Products
- upx-ucl
- Affected versions
- 3.91-1, 3.94-2, 3.94-3, 3.94-4, 3.95-2, 3.95-2build1, 3.96-2, 3.96-3, 4.2.2-3, 4.2.4-1, 4.2.4-1.1, 4.2.4-1.1build1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-23457
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:48 UTC · Revision 1
Source evidence
A Segmentation fault was found in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.
osv:UBUNTU-CVE-2023-23457
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
upx-ucl
Fixed versions: Not specified
Complete source record
{
"id": "ce9d354f42798a00417e899b7c596094e4120e5cef8ec4681fd64cf487cdc1d6",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-23457",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-23457",
"summary": "A Segmentation fault was found in UPX in PackLinuxElf64::invert_pt_dynamic() in p_lx_elf.cpp. An attacker with a crafted input file allows invalid memory address access that could lead to a denial of service.",
"evidence": "osv:UBUNTU-CVE-2023-23457",
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"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"3.91-1"
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"database_specific": {
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},
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],
"modified": "2026-10-17T12:56:04.083462140Z",
"provider": "osv",
"upstream": [
"CVE-2023-23457"
],
"references": [
"https://ubuntu.com/security/CVE-2023-23457",
"https://bugzilla.redhat.com/show_bug.cgi?id=2160382",
"https://github.com/upx/upx/commit/779b648c5f6aa9b33f4728f79dd4d0efec0bf860",
"https://github.com/upx/upx/issues/631",
"https://www.cve.org/CVERecord?id=CVE-2023-23457"
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"evidence": "/upstream"
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"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 354745,
"published_at": "2023-01-12T19:15:00+00:00"
}