Low
netatalk — security advisory
An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.
- Products
- netatalk
- Affected versions
- 2.2.2-1ubuntu1, 2.2.2-1ubuntu2, 2.2.2-1ubuntu2.2, 2.2.2-1ubuntu2.2+esm1, 2.2.2-1ubuntu2.2+esm2, 2.2.2-1ubuntu2.2+esm3, 2.2.2-1ubuntu2.2+esm4, 2.2.5-1, 2.2.5-1ubuntu0.2, 2.2.5-1ubuntu0.2+esm1, 2.2.5-1ubuntu0.2+esm2, 2.2.5-1ubuntu0.2+esm3, 2.2.5-1ubuntu0.2+esm4, 2.2.6-1, 2.2.6-1ubuntu0.18.04.2, 2.2.6-1ubuntu0.18.04.2+esm1, 2.2.6-1ubuntu0.18.04.2+esm2, 2.2.6-1ubuntu0.18.04.2+esm3, 2.2.6-1ubuntu0.18.04.2+esm4, 3.1.12~ds-3, 3.1.12~ds-4, 3.1.12~ds-4ubuntu0.20.04.1, 3.1.12~ds-4ubuntu0.20.04.3, 3.1.12~ds-4ubuntu0.20.04.3+esm1, 3.1.12~ds-4ubuntu0.20.04.4, 3.1.12~ds-4ubuntu0.20.04.4+esm1, 3.1.12~ds-4ubuntu0.20.04.4+esm2, 3.1.12~ds-9, 3.1.12~ds-9build1, 3.1.12~ds-9ubuntu0.22.04.1, 3.1.12~ds-9ubuntu0.22.04.3, 3.1.12~ds-9ubuntu0.22.04.3+esm1, 3.1.12~ds-9ubuntu0.22.04.4, 3.1.12~ds-9ubuntu0.22.04.4+esm1, 3.1.12~ds-9ubuntu0.22.04.4+esm2, 3.1.15~ds-1ubuntu1, 3.1.18~ds-1, 3.1.18~ds-1build2, 3.1.18~ds-1build4, 3.1.18~ds-1ubuntu0.1~esm1, 3.1.18~ds-1ubuntu0.1~esm2, 3.1.18~ds-1ubuntu0.1~esm3, 4.1.2~ds-4, 4.2.1~ds-1, 4.2.3~ds-1, 4.2.3~ds-2, 4.2.3~ds-2.1, 4.2.3~ds-2.1ubuntu0.1, 4.2.3~ds-2.1ubuntu0.2, 4.4.3~ds-1, 4.5.0~ds-3, 4.5.1~ds-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-7836
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:19 UTC · Revision 1
Source evidence
An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.
osv:UBUNTU-CVE-2026-7836
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
netatalk
Fixed versions: Not specified
Complete source record
{
"id": "d3de118e38f8fdaf62db30f405918410b685fcbc3bd2af0c4475a89e49eea550",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-7836",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-7836",
"summary": "An incorrect calculation in the hextoint macro in Netatalk 2.0.0 through 4.4.2 due to improper uppercase character handling allows a remote authenticated attacker to cause limited data modification via crafted hexadecimal input.",
"evidence": "osv:UBUNTU-CVE-2026-7836",
"products": [
{
"name": {
"value": "netatalk",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.2-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1ubuntu2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1ubuntu2.2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1ubuntu2.2+esm1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1ubuntu2.2+esm2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1ubuntu2.2+esm3",
"evidence": "/affected/0/versions"
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{
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]
},
{
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},
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
},
{
"value": "2.2.5-1ubuntu0.2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.5-1ubuntu0.2+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.5-1ubuntu0.2+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.5-1ubuntu0.2+esm3",
"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
}
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},
{
"name": {
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"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
"value": "2.2.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.6-1ubuntu0.18.04.2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.6-1ubuntu0.18.04.2+esm1",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.6-1ubuntu0.18.04.2+esm2",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.6-1ubuntu0.18.04.2+esm3",
"evidence": "/affected/2/versions"
},
{
"value": "2.2.6-1ubuntu0.18.04.2+esm4",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.12~ds-3",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.3",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.3+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.4",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.4+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.12~ds-4ubuntu0.20.04.4+esm2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.12~ds-9",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.1",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.3",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.3+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.4",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.4+esm1",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.12~ds-9ubuntu0.22.04.4+esm2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.15~ds-1ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1build2",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1build4",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1ubuntu0.1~esm1",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1ubuntu0.1~esm2",
"evidence": "/affected/5/versions"
},
{
"value": "3.1.18~ds-1ubuntu0.1~esm3",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.1.2~ds-4",
"evidence": "/affected/6/versions"
},
{
"value": "4.2.1~ds-1",
"evidence": "/affected/6/versions"
},
{
"value": "4.2.3~ds-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.2.3~ds-2.1",
"evidence": "/affected/7/versions"
},
{
"value": "4.4.3~ds-1",
"evidence": "/affected/7/versions"
},
{
"value": "4.5.0~ds-3",
"evidence": "/affected/7/versions"
},
{
"value": "4.5.1~ds-1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "netatalk",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.2.3~ds-1",
"evidence": "/affected/8/versions"
},
{
"value": "4.2.3~ds-2",
"evidence": "/affected/8/versions"
},
{
"value": "4.2.3~ds-2.1",
"evidence": "/affected/8/versions"
},
{
"value": "4.2.3~ds-2.1ubuntu0.1",
"evidence": "/affected/8/versions"
},
{
"value": "4.2.3~ds-2.1ubuntu0.2",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "UBUNTU-CVE-2026-7836",
"aliases": [
"UBUNTU-CVE-2026-7836"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netatalk",
"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"2.2.2-1ubuntu1",
"2.2.2-1ubuntu2",
"2.2.2-1ubuntu2.2",
"2.2.2-1ubuntu2.2+esm1",
"2.2.2-1ubuntu2.2+esm2",
"2.2.2-1ubuntu2.2+esm3",
"2.2.2-1ubuntu2.2+esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netatalk",
"binary_version": "2.2.2-1ubuntu2.2+esm4"
}
]
}
},
{
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{
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],
"package": {
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},
"versions": [
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"2.2.5-1ubuntu0.2+esm2",
"2.2.5-1ubuntu0.2+esm3",
"2.2.5-1ubuntu0.2+esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
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}
]
}
},
{
"ranges": [
{
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]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
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"2.2.6-1ubuntu0.18.04.2",
"2.2.6-1ubuntu0.18.04.2+esm1",
"2.2.6-1ubuntu0.18.04.2+esm2",
"2.2.6-1ubuntu0.18.04.2+esm3",
"2.2.6-1ubuntu0.18.04.2+esm4"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netatalk",
"binary_version": "2.2.6-1ubuntu0.18.04.2+esm4"
}
]
}
},
{
"ranges": [
{
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{
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}
]
}
],
"package": {
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"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"3.1.12~ds-3",
"3.1.12~ds-4",
"3.1.12~ds-4ubuntu0.20.04.1",
"3.1.12~ds-4ubuntu0.20.04.3",
"3.1.12~ds-4ubuntu0.20.04.3+esm1",
"3.1.12~ds-4ubuntu0.20.04.4",
"3.1.12~ds-4ubuntu0.20.04.4+esm1",
"3.1.12~ds-4ubuntu0.20.04.4+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netatalk",
"binary_version": "3.1.12~ds-4ubuntu0.20.04.4+esm2"
}
]
}
},
{
"ranges": [
{
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}
],
"package": {
"name": "netatalk",
"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"3.1.12~ds-9",
"3.1.12~ds-9build1",
"3.1.12~ds-9ubuntu0.22.04.1",
"3.1.12~ds-9ubuntu0.22.04.3",
"3.1.12~ds-9ubuntu0.22.04.3+esm1",
"3.1.12~ds-9ubuntu0.22.04.4",
"3.1.12~ds-9ubuntu0.22.04.4+esm1",
"3.1.12~ds-9ubuntu0.22.04.4+esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netatalk",
"binary_version": "3.1.12~ds-9ubuntu0.22.04.4+esm2"
}
]
}
},
{
"ranges": [
{
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{
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}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=esm-apps%2Fnoble",
"ecosystem": "Ubuntu:Pro:24.04:LTS"
},
"versions": [
"3.1.15~ds-1ubuntu1",
"3.1.18~ds-1",
"3.1.18~ds-1build2",
"3.1.18~ds-1build4",
"3.1.18~ds-1ubuntu0.1~esm1",
"3.1.18~ds-1ubuntu0.1~esm2",
"3.1.18~ds-1ubuntu0.1~esm3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "netatalk",
"binary_version": "3.1.18~ds-1ubuntu0.1~esm3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netatalk",
"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"4.1.2~ds-4",
"4.2.1~ds-1",
"4.2.3~ds-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "a2boot",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "atalkd",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "libatalk",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "macipgw",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "netatalk",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "netatalk-tests",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "netatalk-tools",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "papd",
"binary_version": "4.2.3~ds-1"
},
{
"binary_name": "timelord",
"binary_version": "4.2.3~ds-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netatalk",
"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"4.2.3~ds-2.1",
"4.4.3~ds-1",
"4.5.0~ds-3",
"4.5.1~ds-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "a2boot",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "atalkd",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "libatalk",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "macipgw",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "netatalk",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "netatalk-tests",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "netatalk-tools",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "papd",
"binary_version": "4.5.1~ds-1"
},
{
"binary_name": "timelord",
"binary_version": "4.5.1~ds-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "netatalk",
"purl": "pkg:deb/ubuntu/netatalk?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.2.3~ds-1",
"4.2.3~ds-2",
"4.2.3~ds-2.1",
"4.2.3~ds-2.1ubuntu0.1",
"4.2.3~ds-2.1ubuntu0.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7836.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "a2boot",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "atalkd",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "libatalk",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "macipgw",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "netatalk",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "netatalk-tests",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "netatalk-tools",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "papd",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
},
{
"binary_name": "timelord",
"binary_version": "4.2.3~ds-2.1ubuntu0.2"
}
]
}
}
],
"modified": "2026-10-17T13:01:09.791391243Z",
"provider": "osv",
"upstream": [
"CVE-2026-7836"
],
"references": [
"https://ubuntu.com/security/CVE-2026-7836",
"https://www.cve.org/CVERecord?id=CVE-2026-7836",
"https://netatalk.io/security/CVE-2026-7836"
]
},
"related_cves": [
{
"value": "CVE-2026-7836",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361098,
"published_at": "2026-05-21T08:16:00+00:00"
}