DEBIAN-CVE-2026-28525
SWUpdate contains an integer underflow vulnerability in the multipart upload parser in mongoose_multipart.c that allows unauthenticated attackers to cause a denial of service by sending a crafted HTTP POST request to /upload with a malformed multipart boundary and controlled TCP stream timing. Attackers can trigger an integer underflow in the mg_http_multipart_continue_wait_for_chunk() function when the buffer length falls within a specific range, causing an out-of-bounds heap read past the allocated receive buffer to a local IPC socket.
DEBIAN-CVE-2026-28525
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-28525
swupdate
Source reference: /affected/0/package/name
- Affected versions
- 2022.12+dfsg-4
Source reference:
/affected/0/versions2022.12+dfsg-4+deb12u1Source reference:
/affected/0/versions2022.12+dfsg-4+deb12u1~bpo11+1Source reference:
/affected/0/versions - Fixed versions
- 2022.12+dfsg-4+deb12u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
swupdate
Source reference: /affected/1/package/name
- Affected versions
- 2024.12.1+dfsg-3
Source reference:
/affected/1/versions2024.12.1+dfsg-3+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 2024.12.1+dfsg-3+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
swupdate
Source reference: /affected/2/package/name
- Affected versions
- 2024.12.1+dfsg-3
Source reference:
/affected/2/versions2025.05+dfsg-1Source reference:
/affected/2/versions2025.05+dfsg-2Source reference:
/affected/2/versions2025.05+dfsg-2~bpo13+1Source reference:
/affected/2/versions2025.05+dfsg-3Source reference:
/affected/2/versions2025.05+dfsg-3~bpo13+1Source reference:
/affected/2/versions2025.12+dfsg-1Source reference:
/affected/2/versions2025.12+dfsg-2Source reference:
/affected/2/versions2025.12+dfsg-2~bpo13+1Source reference:
/affected/2/versions2025.12+dfsg-3Source reference:
/affected/2/versions2025.12+dfsg-4Source reference:
/affected/2/versions2025.12+dfsg-5Source reference:
/affected/2/versions2025.12+dfsg-6Source reference:
/affected/2/versions2025.12+dfsg-7Source reference:
/affected/2/versions2025.12+dfsg-7~bpo13+1Source reference:
/affected/2/versions2025.12+dfsg-8Source reference:
/affected/2/versions - Fixed versions
- 2025.12+dfsg-9
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2022.12+dfsg-4+deb12u2"
}
]
}
],
"package": {
"name": "swupdate",
"purl": "pkg:deb/debian/swupdate?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2022.12+dfsg-4",
"2022.12+dfsg-4+deb12u1",
"2022.12+dfsg-4+deb12u1~bpo11+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28525.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2024.12.1+dfsg-3+deb13u2"
}
]
}
],
"package": {
"name": "swupdate",
"purl": "pkg:deb/debian/swupdate?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2024.12.1+dfsg-3",
"2024.12.1+dfsg-3+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28525.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2025.12+dfsg-9"
}
]
}
],
"package": {
"name": "swupdate",
"purl": "pkg:deb/debian/swupdate?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2024.12.1+dfsg-3",
"2025.05+dfsg-1",
"2025.05+dfsg-2",
"2025.05+dfsg-2~bpo13+1",
"2025.05+dfsg-3",
"2025.05+dfsg-3~bpo13+1",
"2025.12+dfsg-1",
"2025.12+dfsg-2",
"2025.12+dfsg-2~bpo13+1",
"2025.12+dfsg-3",
"2025.12+dfsg-4",
"2025.12+dfsg-5",
"2025.12+dfsg-6",
"2025.12+dfsg-7",
"2025.12+dfsg-7~bpo13+1",
"2025.12+dfsg-8"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28525.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56338 · Revision 1
- Added to Heist Feed
- Publisher date