High
rsync — security advisory
rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
- Products
- rsync
- Affected versions
- 3.0.9-4ubuntu1, 3.1.0-2, 3.1.0-2ubuntu0.1, 3.1.0-2ubuntu0.2, 3.1.0-2ubuntu0.3, 3.1.0-2ubuntu0.4, 3.1.0-2ubuntu0.4+esm1, 3.1.0-2ubuntu0.4+esm2, 3.1.0-2ubuntu0.4+esm3, 3.1.0-2ubuntu0.4+esm4, 3.1.1-3, 3.1.1-3ubuntu1, 3.1.1-3ubuntu1.1, 3.1.1-3ubuntu1.2, 3.1.1-3ubuntu1.3, 3.1.1-3ubuntu1.3+esm1, 3.1.1-3ubuntu1.3+esm2, 3.1.1-3ubuntu1.3+esm3, 3.1.1-3ubuntu1.3+esm4, 3.1.1-3ubuntu1.3+esm5, 3.1.1-3ubuntu1.3+esm6, 3.1.2-2, 3.1.2-2.1, 3.1.2-2.1ubuntu1, 3.1.2-2.1ubuntu1.1, 3.1.2-2.1ubuntu1.2, 3.1.2-2.1ubuntu1.3, 3.1.2-2.1ubuntu1.4, 3.1.2-2.1ubuntu1.5, 3.1.2-2.1ubuntu1.6, 3.1.2-2.1ubuntu1.6+esm1, 3.1.2-2.1ubuntu1.6+esm2, 3.1.2-2.1ubuntu1.6+esm3, 3.1.2-2.1ubuntu1.6+esm4, 3.1.3-6, 3.1.3-8, 3.1.3-8ubuntu0.1, 3.1.3-8ubuntu0.2, 3.1.3-8ubuntu0.3, 3.1.3-8ubuntu0.4, 3.1.3-8ubuntu0.5, 3.1.3-8ubuntu0.7, 3.1.3-8ubuntu0.8, 3.1.3-8ubuntu0.9, 3.1.3-8ubuntu0.9+esm1, 3.1.3-8ubuntu0.9+esm2, 3.2.3-4ubuntu1, 3.2.3-4ubuntu2, 3.2.3-8ubuntu1, 3.2.3-8ubuntu2, 3.2.3-8ubuntu3, 3.2.3-8ubuntu3.1, 3.2.7-0ubuntu0.22.04.2, 3.2.7-0ubuntu0.22.04.3, 3.2.7-0ubuntu0.22.04.4, 3.2.7-0ubuntu0.22.04.6, 3.2.7-0ubuntu0.22.04.7, 3.2.7-1, 3.2.7-1build1, 3.2.7-1build2, 3.2.7-1ubuntu1, 3.2.7-1ubuntu1.1, 3.2.7-1ubuntu1.2, 3.2.7-1ubuntu1.4, 3.2.7-1ubuntu1.5, 3.4.1+ds1-5ubuntu1, 3.4.1+ds1-6, 3.4.1+ds1-7, 3.4.1+ds1-7ubuntu0.2, 3.4.1+ds1-7ubuntu0.3, 3.4.4+ds1-1, 3.4.4+ds1-1build1, 3.5.0+ds1-2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-70457
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:51 UTC · Revision 1
Source evidence
rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
osv:UBUNTU-CVE-2026-70457
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
rsync
Fixed versions: Not specified
Complete source record
{
"id": "df00b8326ca32f423ee0d134cdcd148ffbc39dd804da8ed2cff08607209c1705",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-70457",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-70457",
"summary": "rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.",
"evidence": "osv:UBUNTU-CVE-2026-70457",
"products": [
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},
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{
"value": "3.0.9-4ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.0-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.0-2ubuntu0.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.0-2ubuntu0.2",
"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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"evidence": "/affected/1/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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{
"value": "3.1.1-3ubuntu1.3+esm3",
"evidence": "/affected/1/versions"
},
{
"value": "3.1.1-3ubuntu1.3+esm4",
"evidence": "/affected/1/versions"
},
{
"value": "3.1.1-3ubuntu1.3+esm5",
"evidence": "/affected/1/versions"
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{
"value": "3.1.1-3ubuntu1.3+esm6",
"evidence": "/affected/1/versions"
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},
{
"name": {
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"affected_versions": [
{
"value": "3.1.2-2",
"evidence": "/affected/2/versions"
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{
"value": "3.1.2-2.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.2",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.3",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.4",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.5",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6+esm1",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6+esm2",
"evidence": "/affected/2/versions"
},
{
"value": "3.1.2-2.1ubuntu1.6+esm3",
"evidence": "/affected/2/versions"
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{
"value": "3.1.2-2.1ubuntu1.6+esm4",
"evidence": "/affected/2/versions"
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},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.1.3-6",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.2",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.3",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.4",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.5",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.7",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.8",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.9",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.9+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.1.3-8ubuntu0.9+esm2",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "rsync",
"evidence": "/affected/4/package/name"
},
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{
"value": "3.2.3-4ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "3.2.3-4ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "3.2.3-8ubuntu1",
"evidence": "/affected/4/versions"
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{
"value": "3.2.3-8ubuntu2",
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{
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{
"value": "3.2.3-8ubuntu3.1",
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{
"value": "3.2.7-0ubuntu0.22.04.2",
"evidence": "/affected/4/versions"
},
{
"value": "3.2.7-0ubuntu0.22.04.3",
"evidence": "/affected/4/versions"
},
{
"value": "3.2.7-0ubuntu0.22.04.4",
"evidence": "/affected/4/versions"
},
{
"value": "3.2.7-0ubuntu0.22.04.6",
"evidence": "/affected/4/versions"
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{
"value": "3.2.7-0ubuntu0.22.04.7",
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{
"value": "3.2.7-1",
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{
"value": "3.2.7-1build1",
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{
"value": "3.2.7-1build2",
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{
"value": "3.2.7-1ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "3.2.7-1ubuntu1.1",
"evidence": "/affected/5/versions"
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{
"value": "3.2.7-1ubuntu1.2",
"evidence": "/affected/5/versions"
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{
"value": "3.2.7-1ubuntu1.4",
"evidence": "/affected/5/versions"
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{
"value": "3.2.7-1ubuntu1.5",
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{
"name": {
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{
"value": "3.4.1+ds1-7",
"evidence": "/affected/6/versions"
},
{
"value": "3.4.4+ds1-1",
"evidence": "/affected/6/versions"
},
{
"value": "3.4.4+ds1-1build1",
"evidence": "/affected/6/versions"
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{
"value": "3.5.0+ds1-2",
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{
"name": {
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{
"value": "3.4.1+ds1-5ubuntu1",
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{
"value": "3.4.1+ds1-6",
"evidence": "/affected/7/versions"
},
{
"value": "3.4.1+ds1-7",
"evidence": "/affected/7/versions"
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{
"value": "3.4.1+ds1-7ubuntu0.2",
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{
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],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-70457",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
},
{
"type": "CVSS_V4",
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},
{
"type": "Ubuntu",
"score": "medium"
}
],
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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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"3.2.7-1",
"3.2.7-1build1",
"3.2.7-1build2",
"3.2.7-1ubuntu1",
"3.2.7-1ubuntu1.1",
"3.2.7-1ubuntu1.2",
"3.2.7-1ubuntu1.4",
"3.2.7-1ubuntu1.5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-70457.json"
},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "3.2.7-1ubuntu1.5"
}
]
}
},
{
"ranges": [
{
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"events": [
{
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}
]
}
],
"package": {
"name": "rsync",
"purl": "pkg:deb/ubuntu/rsync?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"3.4.1+ds1-7",
"3.4.4+ds1-1",
"3.4.4+ds1-1build1",
"3.5.0+ds1-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-70457.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rsync",
"binary_version": "3.5.0+ds1-2"
}
]
}
},
{
"ranges": [
{
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{
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],
"package": {
"name": "rsync",
"purl": "pkg:deb/ubuntu/rsync?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.4.1+ds1-5ubuntu1",
"3.4.1+ds1-6",
"3.4.1+ds1-7",
"3.4.1+ds1-7ubuntu0.2",
"3.4.1+ds1-7ubuntu0.3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-70457.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "rsync",
"binary_version": "3.4.1+ds1-7ubuntu0.3"
}
]
}
}
],
"modified": "2026-10-17T12:59:27.577122136Z",
"provider": "osv",
"upstream": [
"CVE-2026-70457"
],
"references": [
"https://ubuntu.com/security/CVE-2026-70457",
"https://www.cve.org/CVERecord?id=CVE-2026-70457",
"https://download.samba.org/pub/rsync/NEWS#3.5.0"
]
},
"related_cves": [
{
"value": "CVE-2026-70457",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/2/score"
},
"source_id": "core-osv",
"document_id": 359660,
"published_at": "2026-08-13T15:19:00+00:00"
}