Critical
watchman — security advisory
NuProcess is an external process execution implementation for Java. In all the versions of NuProcess where it forks processes by using the JVM's Java_java_lang_UNIXProcess_forkAndExec method (1.2.0+), attackers can use NUL characters in their strings to perform command line injection. Java's ProcessBuilder isn't vulnerable because of a check in ProcessBuilder.start. NuProcess is missing that check. This vulnerability can only be exploited to inject command line arguments on Linux. Version 2.0.5 contains a patch. As a workaround, users of the library can sanitize command strings to remove NUL characters prior to passing them to NuProcess for execution.
- Products
- watchman
- Affected versions
- 4.9.0-2, 4.9.0-3, 4.9.0-3build1, 4.9.0-5build1, 4.9.0-5build2, 4.9.0-6, 4.9.0-6build1, 4.9.0-6build2, 4.9.0-7build1, 4.9.0-7build2, 4.9.0-7build3, 4.9.0-7build4, 4.9.0-8build1, 4.9.0-9, 4.9.0-9build1, 4.9.0-9build2, 4.9.0-9build3, 4.9.0-9build4
- Fixed versions
- Not specified
- CVEs
- CVE-2022-39243
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:38 UTC · Revision 1
Source evidence
NuProcess is an external process execution implementation for Java. In all the versions of NuProcess where it forks processes by using the JVM's Java_java_lang_UNIXProcess_forkAndExec method (1.2.0+), attackers can use NUL characters in their strings to perform command line injection. Java's ProcessBuilder isn't vulnerable because of a check in ProcessBuilder.start. NuProcess is missing that check. This vulnerability can only be exploited to inject command line arguments on Linux. Version 2.0.5 contains a patch. As a workaround, users of the library can sanitize command strings to remove NUL characters prior to passing them to NuProcess for execution.
osv:UBUNTU-CVE-2022-39243
watchman
Fixed versions: Not specified
watchman
Fixed versions: Not specified
watchman
Fixed versions: Not specified
watchman
Fixed versions: Not specified
watchman
Fixed versions: Not specified
watchman
Fixed versions: Not specified
Complete source record
{
"id": "d619a72d7140effb3c7bfd4cffcbbf9c9cb89f203be73277d18acc600dbb21cb",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-39243",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2022-39243",
"summary": "NuProcess is an external process execution implementation for Java. In all the versions of NuProcess where it forks processes by using the JVM's Java_java_lang_UNIXProcess_forkAndExec method (1.2.0+), attackers can use NUL characters in their strings to perform command line injection. Java's ProcessBuilder isn't vulnerable because of a check in ProcessBuilder.start. NuProcess is missing that check. This vulnerability can only be exploited to inject command line arguments on Linux. Version 2.0.5 contains a patch. As a workaround, users of the library can sanitize command strings to remove NUL characters prior to passing them to NuProcess for execution.",
"evidence": "osv:UBUNTU-CVE-2022-39243",
"products": [
{
"name": {
"value": "watchman",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.9.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.9.0-3",
"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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{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.9.0-7build1",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
},
{
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{
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.9.0-9build3",
"evidence": "/affected/4/versions"
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{
"value": "4.9.0-9build4",
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{
"name": {
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"evidence": "/affected/5/package/name"
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"evidence": "/affected/5/versions"
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"evidence": "/affected/5/versions"
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{
"value": "4.9.0-9build2",
"evidence": "/affected/5/versions"
},
{
"value": "4.9.0-9build3",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2022-39243",
"aliases": [
"UBUNTU-CVE-2022-39243"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "watchman",
"purl": "pkg:deb/ubuntu/watchman?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"4.9.0-2",
"4.9.0-3",
"4.9.0-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-39243.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-pywatchman",
"binary_version": "4.9.0-3build1"
},
{
"binary_name": "watchman",
"binary_version": "4.9.0-3build1"
}
]
}
},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/watchman?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.9.0-5build1",
"4.9.0-5build2",
"4.9.0-6",
"4.9.0-6build1",
"4.9.0-6build2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-39243.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-pywatchman",
"binary_version": "4.9.0-6build2"
},
{
"binary_name": "watchman",
"binary_version": "4.9.0-6build2"
}
]
}
},
{
"ranges": [
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"events": [
{
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}
]
}
],
"package": {
"name": "watchman",
"purl": "pkg:deb/ubuntu/watchman?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"4.9.0-7build1",
"4.9.0-7build2",
"4.9.0-7build3",
"4.9.0-7build4"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-pywatchman",
"binary_version": "4.9.0-7build4"
},
{
"binary_name": "watchman",
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}
]
}
},
{
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{
"type": "ECOSYSTEM",
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],
"package": {
"name": "watchman",
"purl": "pkg:deb/ubuntu/watchman?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"4.9.0-8build1",
"4.9.0-9"
],
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},
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}
]
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{
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.9.0-9build3",
"4.9.0-9build4"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-pywatchman",
"binary_version": "4.9.0-9build4"
},
{
"binary_name": "watchman",
"binary_version": "4.9.0-9build4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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],
"package": {
"name": "watchman",
"purl": "pkg:deb/ubuntu/watchman?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.9.0-9",
"4.9.0-9build1",
"4.9.0-9build2",
"4.9.0-9build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-39243.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-pywatchman",
"binary_version": "4.9.0-9build3"
},
{
"binary_name": "watchman",
"binary_version": "4.9.0-9build3"
}
]
}
}
],
"modified": "2026-10-17T12:57:15.172561160Z",
"provider": "osv",
"upstream": [
"CVE-2022-39243"
],
"references": [
"https://ubuntu.com/security/CVE-2022-39243",
"https://github.com/brettwooldridge/NuProcess/commit/29bc09de561bf00ff9bf77123756363a9709f868",
"https://github.com/brettwooldridge/NuProcess/security/advisories/GHSA-cxgf-v2p8-7ph7",
"https://github.com/brettwooldridge/NuProcess/pull/143",
"https://www.cve.org/CVERecord?id=CVE-2022-39243"
]
},
"related_cves": [
{
"value": "CVE-2022-39243",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 357027,
"published_at": "2022-09-26T14:15:00+00:00"
}