Medium
mina, mina2 — security advisory
Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH. Using a very small "block size" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.
- Products
- mina, mina2
- Affected versions
- 1.1.7.dfsg-11, 1.1.7.dfsg-12, 1.1.7.dfsg-13, 1.1.7.dfsg-13ubuntu1, 2.0.16-2, 2.0.19-2, 2.0.7+dfsg-2, 2.0.9-1, 2.0.9-2, 2.1.4-2, 2.1.5-1, 2.1.5-1ubuntu0.1~esm1, 2.2.1-3, 2.2.1-3ubuntu0.1~esm1, 2.2.1-4, 2.2.1-4ubuntu0.1~esm1, 2.2.1-4ubuntu1, 2.2.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-94029
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:33 UTC · Revision 1
Source evidence
Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH. Using a very small "block size" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.
osv:UBUNTU-CVE-2026-94029
mina
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina2
Fixed versions: Not specified
mina2
Fixed versions: Not specified
Complete source record
{
"id": "e2e0f5ca6092a4fd455ab95d58a0127a588143aa1bfbefa76f616aa18018b1dc",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-94029",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-94029",
"summary": "Server-side memory exhaustion in Apache MINA SSHD 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5, component sshd-sftp, in the SFTP v6 check-file-name/check-file-handle extension. Apache MINA SSHD is a Java library for client-side and server-side SSH. Using a very small \"block size\" (for instance 256, which is the minimum) on a huge file generates many (file size / block size) hashes. The resulting SFTP reply message was accumulated fully in memory server-side, which could, with a suitably large (possibly sparse) file exhaust the server-side memory, taking down the server. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue by imposing a maximum limit on the size of the reply. Many SFTP implementations have a general limit on the size of SFTP messages anyway; typically 256kB as in OpenSSH or also in Apache MINA SSHD.",
"evidence": "osv:UBUNTU-CVE-2026-94029",
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{
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"evidence": "/affected/9/package/name"
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"prerequisites": [],
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"affected_versions": [
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"evidence": "/affected/9/versions"
},
{
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"evidence": "/affected/9/versions"
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},
{
"name": {
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"evidence": "/affected/10/package/name"
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{
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{
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{
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{
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"evidence": "/affected/11/versions"
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}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-94029",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
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}
],
"affected": [
{
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"events": [
{
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}
]
}
],
"package": {
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},
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],
"database_specific": {
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},
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{
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},
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],
"modified": "2026-10-17T13:01:18.658092540Z",
"provider": "osv",
"upstream": [
"CVE-2026-94029"
],
"references": [
"https://ubuntu.com/security/CVE-2026-94029",
"https://www.cve.org/CVERecord?id=CVE-2026-94029",
"https://www.openwall.com/lists/oss-security/2026/09/29/37"
]
},
"related_cves": [
{
"value": "CVE-2026-94029",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361607,
"published_at": "2026-09-30T10:17:00+00:00"
}