Medium
flatpak — security advisory
Flatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.
- Products
- flatpak
- Affected versions
- 0.10.0-1, 0.10.0-2, 0.10.1-1, 0.10.2-1, 0.10.2.1-1, 0.10.2.1-2, 0.10.3-1, 0.11.1-0ubuntu1, 0.11.3-2, 0.11.3-3, 0.11.7-0ubuntu0.1, 0.8.7-5, 1.0.1-0ubuntu0.1, 1.0.6-0ubuntu0.1, 1.0.7-0ubuntu0.18.04.1, 1.0.8-0ubuntu0.18.04.1, 1.0.9-0ubuntu0.1, 1.0.9-0ubuntu0.2, 1.0.9-0ubuntu0.3, 1.0.9-0ubuntu0.4, 1.0.9-0ubuntu0.4+esm1, 1.10.2-3, 1.12.2-1, 1.12.2-2, 1.12.3-1, 1.12.4-1, 1.12.5-1, 1.12.6-1, 1.12.7-1, 1.12.7-1ubuntu0.1, 1.12.7-1ubuntu0.1+esm1, 1.14.4-2, 1.14.5-1, 1.14.5-1build1, 1.14.5-1build4, 1.14.5-1build5, 1.14.5-1build6, 1.14.6-1, 1.14.6-1ubuntu0.1, 1.14.6-1ubuntu0.1+esm1, 1.16.1-2ubuntu1, 1.16.1-3ubuntu1, 1.16.2-1, 1.16.3-1, 1.16.3-1build1, 1.16.4-1, 1.16.4-2, 1.16.6-1, 1.18.0-1, 1.18.1-1, 1.18.2-1, 1.18.4-1, 1.4.3-1, 1.6.0-1, 1.6.1-1, 1.6.2-1, 1.6.3-1, 1.6.5-0ubuntu0.1, 1.6.5-0ubuntu0.2, 1.6.5-0ubuntu0.3, 1.6.5-0ubuntu0.4, 1.6.5-0ubuntu0.5, 1.6.5-0ubuntu0.5+esm1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-97029
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:34 UTC · Revision 1
Source evidence
Flatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.
osv:UBUNTU-CVE-2026-97029
flatpak
Fixed versions: Not specified
flatpak
Fixed versions: Not specified
flatpak
Fixed versions: Not specified
flatpak
Fixed versions: Not specified
flatpak
Fixed versions: Not specified
flatpak
Fixed versions: Not specified
Complete source record
{
"id": "d0b2f766a99d7cce63d522adbcd8d800a701fc8c9105246ab6598066d67e584e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-97029",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-97029",
"summary": "Flatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.",
"evidence": "osv:UBUNTU-CVE-2026-97029",
"products": [
{
"name": {
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"evidence": "/affected/0/package/name"
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{
"value": "0.8.7-5",
"evidence": "/affected/0/versions"
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{
"value": "0.10.0-1",
"evidence": "/affected/0/versions"
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{
"value": "0.10.0-2",
"evidence": "/affected/0/versions"
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{
"value": "0.10.1-1",
"evidence": "/affected/0/versions"
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{
"value": "0.10.2-1",
"evidence": "/affected/0/versions"
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{
"value": "0.10.2.1-1",
"evidence": "/affected/0/versions"
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{
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{
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{
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"evidence": "/affected/0/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "1.6.5-0ubuntu0.4",
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{
"value": "1.6.5-0ubuntu0.5",
"evidence": "/affected/1/versions"
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{
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},
{
"name": {
"value": "flatpak",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.10.2-3",
"evidence": "/affected/2/versions"
},
{
"value": "1.12.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.12.2-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.12.3-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.12.4-1",
"evidence": "/affected/2/versions"
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{
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{
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{
"value": "1.12.7-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.12.7-1ubuntu0.1",
"evidence": "/affected/2/versions"
},
{
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{
"name": {
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"evidence": "/affected/3/package/name"
},
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{
"value": "1.14.4-2",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.5-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.5-1build1",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.5-1build4",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.5-1build5",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.5-1build6",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.6-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.6-1ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "1.14.6-1ubuntu0.1+esm1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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{
"value": "1.16.6-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.18.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "1.18.1-1",
"evidence": "/affected/4/versions"
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{
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{
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{
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{
"value": "1.16.1-3ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "1.16.2-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.16.3-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.16.3-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "1.16.4-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.16.4-2",
"evidence": "/affected/5/versions"
},
{
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"evidence": "/affected/5/versions"
}
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}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-97029",
"aliases": [
"UBUNTU-CVE-2026-97029"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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{
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}
]
}
],
"package": {
"name": "flatpak",
"purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"0.8.7-5",
"0.10.0-1",
"0.10.0-2",
"0.10.1-1",
"0.10.2-1",
"0.10.2.1-1",
"0.10.2.1-2",
"0.10.3-1",
"0.11.1-0ubuntu1",
"0.11.3-2",
"0.11.3-3",
"0.11.7-0ubuntu0.1",
"1.0.1-0ubuntu0.1",
"1.0.6-0ubuntu0.1",
"1.0.7-0ubuntu0.18.04.1",
"1.0.8-0ubuntu0.18.04.1",
"1.0.9-0ubuntu0.1",
"1.0.9-0ubuntu0.2",
"1.0.9-0ubuntu0.3",
"1.0.9-0ubuntu0.4",
"1.0.9-0ubuntu0.4+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97029.json"
},
"ecosystem_specific": {
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{
"binary_name": "flatpak-tests",
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{
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{
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"versions": [
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"1.6.3-1",
"1.6.5-0ubuntu0.1",
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"1.6.5-0ubuntu0.3",
"1.6.5-0ubuntu0.4",
"1.6.5-0ubuntu0.5",
"1.6.5-0ubuntu0.5+esm1"
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"database_specific": {
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{
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{
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},
{
"binary_name": "libflatpak0",
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}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
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"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"1.10.2-3",
"1.12.2-1",
"1.12.2-2",
"1.12.3-1",
"1.12.4-1",
"1.12.5-1",
"1.12.6-1",
"1.12.7-1",
"1.12.7-1ubuntu0.1",
"1.12.7-1ubuntu0.1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97029.json"
},
"ecosystem_specific": {
"binaries": [
{
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},
{
"binary_name": "flatpak-tests",
"binary_version": "1.12.7-1ubuntu0.1+esm1"
},
{
"binary_name": "gir1.2-flatpak-1.0",
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},
{
"binary_name": "libflatpak0",
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]
}
},
{
"ranges": [
{
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{
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],
"package": {
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"purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"1.14.4-2",
"1.14.5-1",
"1.14.5-1build1",
"1.14.5-1build4",
"1.14.5-1build5",
"1.14.5-1build6",
"1.14.6-1",
"1.14.6-1ubuntu0.1",
"1.14.6-1ubuntu0.1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97029.json"
},
"ecosystem_specific": {
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{
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"binary_version": "1.14.6-1ubuntu0.1+esm1"
},
{
"binary_name": "flatpak-tests",
"binary_version": "1.14.6-1ubuntu0.1+esm1"
},
{
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},
{
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}
},
{
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],
"package": {
"name": "flatpak",
"purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
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"1.18.0-1",
"1.18.1-1",
"1.18.2-1",
"1.18.4-1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "flatpak",
"binary_version": "1.18.4-1"
},
{
"binary_name": "flatpak-tests",
"binary_version": "1.18.4-1"
},
{
"binary_name": "gir1.2-flatpak-1.0",
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},
{
"binary_name": "libflatpak0",
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},
{
"ranges": [
{
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{
"introduced": "0"
}
]
}
],
"package": {
"name": "flatpak",
"purl": "pkg:deb/ubuntu/flatpak?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.16.1-2ubuntu1",
"1.16.1-3ubuntu1",
"1.16.2-1",
"1.16.3-1",
"1.16.3-1build1",
"1.16.4-1",
"1.16.4-2",
"1.16.6-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-97029.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "flatpak",
"binary_version": "1.16.6-1"
},
{
"binary_name": "flatpak-tests",
"binary_version": "1.16.6-1"
},
{
"binary_name": "gir1.2-flatpak-1.0",
"binary_version": "1.16.6-1"
},
{
"binary_name": "libflatpak0",
"binary_version": "1.16.6-1"
}
]
}
}
],
"modified": "2026-10-17T13:01:20.103603021Z",
"provider": "osv",
"upstream": [
"CVE-2026-97029"
],
"references": [
"https://ubuntu.com/security/CVE-2026-97029",
"https://www.cve.org/CVERecord?id=CVE-2026-97029",
"https://github.com/flatpak/flatpak/security/advisories/GHSA-f3p8-vr7v-gxf2",
"https://access.redhat.com/security/cve/CVE-2026-97029",
"https://bugzilla.redhat.com/show_bug.cgi?id=2542698"
]
},
"related_cves": [
{
"value": "CVE-2026-97029",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361731,
"published_at": "2026-09-29T04:18:00+00:00"
}