Critical
golang-1.16, golang-1.17 and 7 more products — security advisory
During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.
- Products
- golang-1.16, golang-1.17, golang-1.18, golang-1.20, golang-1.21, golang-1.22, golang-1.23, golang-1.24, golang-1.25
- Affected versions
- 1.16.2-0ubuntu1~18.04.2, 1.16.2-0ubuntu1~18.04.2+esm1, 1.16.2-0ubuntu1~20.04, 1.16.2-0ubuntu1~20.04.1, 1.16.2-0ubuntu1~20.04.1+esm1, 1.17-1ubuntu2, 1.17.13-3ubuntu1, 1.17.13-3ubuntu1.2, 1.17.13-3ubuntu1.3, 1.17.3-1ubuntu1, 1.17.3-1ubuntu2, 1.18-1ubuntu1, 1.18.1-1ubuntu1, 1.18.1-1ubuntu1.1, 1.18.1-1ubuntu1.2, 1.18.1-1ubuntu1.3, 1.18.1-1ubuntu1~16.04.6, 1.18.1-1ubuntu1~16.04.6+esm1, 1.18.1-1ubuntu1~18.04.3, 1.18.1-1ubuntu1~18.04.4, 1.18.1-1ubuntu1~18.04.4+esm1, 1.18.1-1ubuntu1~20.04.1, 1.18.1-1ubuntu1~20.04.2, 1.18.1-1ubuntu1~20.04.3, 1.18~beta1-0ubuntu1, 1.18~beta2-1ubuntu1, 1.18~beta2-1ubuntu2, 1.18~rc1-1ubuntu1, 1.20.3-1ubuntu0.1~20.04, 1.20.3-1ubuntu0.1~20.04.1, 1.20.3-1ubuntu0.1~22.04, 1.20.3-1ubuntu0.1~22.04.1, 1.21.1-1, 1.21.1-1~ubuntu20.04.1, 1.21.1-1~ubuntu20.04.2, 1.21.1-1~ubuntu20.04.3, 1.21.1-1~ubuntu22.04.1, 1.21.1-1~ubuntu22.04.2, 1.21.1-1~ubuntu22.04.3, 1.21.1-1~ubuntu22.04.4, 1.21.3-1, 1.21.4-1, 1.21.5-1, 1.21.6-1, 1.21.7-1, 1.21.7-2, 1.21.8-1, 1.21.8-1build1, 1.21.9-1, 1.21.9-1ubuntu0.1, 1.22.0-1, 1.22.0-2, 1.22.1-1, 1.22.1-1build1, 1.22.2-2, 1.22.2-2ubuntu0.1, 1.22.2-2ubuntu0.2, 1.22.2-2ubuntu0.3, 1.22.2-2ubuntu0.4, 1.22.2-2ubuntu0.5, 1.22.2-2~20.04.1, 1.22.2-2~20.04.2, 1.22.2-2~20.04.3, 1.22.2-2~22.04, 1.22.2-2~22.04.1, 1.22.2-2~22.04.2, 1.22.2-2~22.04.3, 1.22.2-2~22.04.4, 1.22~rc1-2, 1.23.1-1~22.04, 1.23.1-1~22.04.2, 1.23.1-1~22.04.3, 1.23.1-1~24.04, 1.23.1-1~24.04.1, 1.23.10-1, 1.23.10-1ubuntu0.2, 1.23.8-1, 1.24.13-2~22.04.1, 1.24.13-2~22.04.2, 1.24.13-2~24.04.1, 1.24.2-1, 1.24.2-2, 1.24.4-1, 1.24.4-1ubuntu1, 1.24.4-1ubuntu1~22.04.1, 1.24.4-1ubuntu1~22.04.2, 1.24.4-1ubuntu1~24.04.1, 1.24.4-1ubuntu1~24.04.2, 1.25.0-0ubuntu1, 1.25.14-1~ubuntu0.22.04.1, 1.25.14-1~ubuntu0.24.04.1, 1.25.14-1~ubuntu0.26.04.1, 1.25.7-2, 1.25.7-2~25.10.1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-68121
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:14 UTC · Revision 1
Source evidence
During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.
osv:UBUNTU-CVE-2025-68121
golang-1.18
Fixed versions: Not specified
golang-1.16
Fixed versions: Not specified
golang-1.18
Fixed versions: Not specified
golang-1.16
Fixed versions: Not specified
golang-1.18
Fixed versions: Not specified
golang-1.20
Fixed versions: Not specified
golang-1.21
Fixed versions: Not specified
golang-1.22
Fixed versions: Not specified
golang-1.17
Fixed versions: Not specified
golang-1.18
Fixed versions: Not specified
golang-1.20
Fixed versions: Not specified
golang-1.21
Fixed versions: Not specified
golang-1.22
Fixed versions: Not specified
golang-1.23
Fixed versions: Not specified
golang-1.24
Fixed versions: Not specified
golang-1.25
Fixed versions: Not specified
golang-1.21
Fixed versions: Not specified
golang-1.22
Fixed versions: Not specified
golang-1.23
Fixed versions: Not specified
golang-1.24
Fixed versions: Not specified
golang-1.25
Fixed versions: Not specified
golang-1.23
Fixed versions: Not specified
golang-1.24
Fixed versions: Not specified
golang-1.25
Fixed versions: Not specified
golang-1.23
Fixed versions: Not specified
golang-1.25
Fixed versions: Not specified
Complete source record
{
"id": "313816f647cc02825116b8f462f713bbe08563274f68e6f3b200c60795b39c32",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-68121",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-68121",
"summary": "During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.",
"evidence": "osv:UBUNTU-CVE-2025-68121",
"products": [
{
"name": {
"value": "golang-1.18",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.18.1-1ubuntu1~16.04.6",
"evidence": "/affected/0/versions"
},
{
"value": "1.18.1-1ubuntu1~16.04.6+esm1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "golang-1.16",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.16.2-0ubuntu1~18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "1.16.2-0ubuntu1~18.04.2+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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},
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"affected_versions": [
{
"value": "1.18.1-1ubuntu1~18.04.3",
"evidence": "/affected/2/versions"
},
{
"value": "1.18.1-1ubuntu1~18.04.4",
"evidence": "/affected/2/versions"
},
{
"value": "1.18.1-1ubuntu1~18.04.4+esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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{
"value": "1.16.2-0ubuntu1~20.04.1+esm1",
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}
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},
{
"name": {
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},
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"fixed_versions": [],
"affected_versions": [
{
"value": "1.18.1-1ubuntu1~20.04.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.18.1-1ubuntu1~20.04.2",
"evidence": "/affected/4/versions"
},
{
"value": "1.18.1-1ubuntu1~20.04.3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "golang-1.20",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.20.3-1ubuntu0.1~20.04",
"evidence": "/affected/5/versions"
},
{
"value": "1.20.3-1ubuntu0.1~20.04.1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "golang-1.21",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.21.1-1~ubuntu20.04.1",
"evidence": "/affected/6/versions"
},
{
"value": "1.21.1-1~ubuntu20.04.2",
"evidence": "/affected/6/versions"
},
{
"value": "1.21.1-1~ubuntu20.04.3",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "golang-1.22",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.22.2-2~20.04.1",
"evidence": "/affected/7/versions"
},
{
"value": "1.22.2-2~20.04.2",
"evidence": "/affected/7/versions"
},
{
"value": "1.22.2-2~20.04.3",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "golang-1.17",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.17-1ubuntu2",
"evidence": "/affected/8/versions"
},
{
"value": "1.17.3-1ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "1.17.3-1ubuntu2",
"evidence": "/affected/8/versions"
},
{
"value": "1.17.13-3ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "1.17.13-3ubuntu1.2",
"evidence": "/affected/8/versions"
},
{
"value": "1.17.13-3ubuntu1.3",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "golang-1.18",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.18~beta1-0ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18~beta2-1ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18~beta2-1ubuntu2",
"evidence": "/affected/9/versions"
},
{
"value": "1.18~rc1-1ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18-1ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18.1-1ubuntu1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18.1-1ubuntu1.1",
"evidence": "/affected/9/versions"
},
{
"value": "1.18.1-1ubuntu1.2",
"evidence": "/affected/9/versions"
},
{
"value": "1.18.1-1ubuntu1.3",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "golang-1.20",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.20.3-1ubuntu0.1~22.04",
"evidence": "/affected/10/versions"
},
{
"value": "1.20.3-1ubuntu0.1~22.04.1",
"evidence": "/affected/10/versions"
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]
},
{
"name": {
"value": "golang-1.21",
"evidence": "/affected/11/package/name"
},
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"affected_versions": [
{
"value": "1.21.1-1~ubuntu22.04.1",
"evidence": "/affected/11/versions"
},
{
"value": "1.21.1-1~ubuntu22.04.2",
"evidence": "/affected/11/versions"
},
{
"value": "1.21.1-1~ubuntu22.04.3",
"evidence": "/affected/11/versions"
},
{
"value": "1.21.1-1~ubuntu22.04.4",
"evidence": "/affected/11/versions"
}
]
},
{
"name": {
"value": "golang-1.22",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.22.2-2~22.04",
"evidence": "/affected/12/versions"
},
{
"value": "1.22.2-2~22.04.1",
"evidence": "/affected/12/versions"
},
{
"value": "1.22.2-2~22.04.2",
"evidence": "/affected/12/versions"
},
{
"value": "1.22.2-2~22.04.3",
"evidence": "/affected/12/versions"
},
{
"value": "1.22.2-2~22.04.4",
"evidence": "/affected/12/versions"
}
]
},
{
"name": {
"value": "golang-1.23",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.23.1-1~22.04",
"evidence": "/affected/13/versions"
},
{
"value": "1.23.1-1~22.04.2",
"evidence": "/affected/13/versions"
},
{
"value": "1.23.1-1~22.04.3",
"evidence": "/affected/13/versions"
}
]
},
{
"name": {
"value": "golang-1.24",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.24.4-1ubuntu1~22.04.1",
"evidence": "/affected/14/versions"
},
{
"value": "1.24.4-1ubuntu1~22.04.2",
"evidence": "/affected/14/versions"
},
{
"value": "1.24.13-2~22.04.1",
"evidence": "/affected/14/versions"
},
{
"value": "1.24.13-2~22.04.2",
"evidence": "/affected/14/versions"
}
]
},
{
"name": {
"value": "golang-1.25",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.25.14-1~ubuntu0.22.04.1",
"evidence": "/affected/15/versions"
}
]
},
{
"name": {
"value": "golang-1.21",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.21.1-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.3-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.4-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.5-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.6-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.7-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.7-2",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.8-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.8-1build1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.9-1",
"evidence": "/affected/16/versions"
},
{
"value": "1.21.9-1ubuntu0.1",
"evidence": "/affected/16/versions"
}
]
},
{
"name": {
"value": "golang-1.22",
"evidence": "/affected/17/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.22~rc1-2",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.0-1",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.0-2",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.1-1",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.1-1build1",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2ubuntu0.1",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2ubuntu0.2",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2ubuntu0.3",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2ubuntu0.4",
"evidence": "/affected/17/versions"
},
{
"value": "1.22.2-2ubuntu0.5",
"evidence": "/affected/17/versions"
}
]
},
{
"name": {
"value": "golang-1.23",
"evidence": "/affected/18/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.23.1-1~24.04",
"evidence": "/affected/18/versions"
},
{
"value": "1.23.1-1~24.04.1",
"evidence": "/affected/18/versions"
}
]
},
{
"name": {
"value": "golang-1.24",
"evidence": "/affected/19/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.24.4-1ubuntu1~24.04.1",
"evidence": "/affected/19/versions"
},
{
"value": "1.24.4-1ubuntu1~24.04.2",
"evidence": "/affected/19/versions"
},
{
"value": "1.24.13-2~24.04.1",
"evidence": "/affected/19/versions"
}
]
},
{
"name": {
"value": "golang-1.25",
"evidence": "/affected/20/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.25.14-1~ubuntu0.24.04.1",
"evidence": "/affected/20/versions"
}
]
},
{
"name": {
"value": "golang-1.23",
"evidence": "/affected/21/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.23.8-1",
"evidence": "/affected/21/versions"
},
{
"value": "1.23.10-1",
"evidence": "/affected/21/versions"
},
{
"value": "1.23.10-1ubuntu0.2",
"evidence": "/affected/21/versions"
}
]
},
{
"name": {
"value": "golang-1.24",
"evidence": "/affected/22/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.24.2-1",
"evidence": "/affected/22/versions"
},
{
"value": "1.24.2-2",
"evidence": "/affected/22/versions"
},
{
"value": "1.24.4-1",
"evidence": "/affected/22/versions"
},
{
"value": "1.24.4-1ubuntu1",
"evidence": "/affected/22/versions"
}
]
},
{
"name": {
"value": "golang-1.25",
"evidence": "/affected/23/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.25.0-0ubuntu1",
"evidence": "/affected/23/versions"
},
{
"value": "1.25.7-2~25.10.1",
"evidence": "/affected/23/versions"
}
]
},
{
"name": {
"value": "golang-1.23",
"evidence": "/affected/24/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.23.10-1",
"evidence": "/affected/24/versions"
}
]
},
{
"name": {
"value": "golang-1.25",
"evidence": "/affected/25/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.25.0-0ubuntu1",
"evidence": "/affected/25/versions"
},
{
"value": "1.25.7-2",
"evidence": "/affected/25/versions"
},
{
"value": "1.25.14-1~ubuntu0.26.04.1",
"evidence": "/affected/25/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2025-68121",
"aliases": [
"UBUNTU-CVE-2025-68121"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "golang-1.18",
"purl": "pkg:deb/ubuntu/golang-1.18?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.18.1-1ubuntu1~16.04.6",
"1.18.1-1ubuntu1~16.04.6+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68121.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "golang-1.18",
"binary_version": "1.18.1-1ubuntu1~16.04.6+esm1"
},
{
"binary_name": "golang-1.18-go",
"binary_version": "1.18.1-1ubuntu1~16.04.6+esm1"
},
{
"binary_name": "golang-1.18-src",
"binary_version": "1.18.1-1ubuntu1~16.04.6+esm1"
}
]
}
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}
],
"modified": "2026-10-27T04:15:27.401170186Z",
"provider": "osv",
"upstream": [
"CVE-2025-68121"
],
"references": [
"https://ubuntu.com/security/CVE-2025-68121",
"https://www.cve.org/CVERecord?id=CVE-2025-68121",
"https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc",
"https://github.com/golang/go/issues/77113"
]
},
"related_cves": [
{
"value": "CVE-2025-68121",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 460172,
"published_at": "2026-02-05T18:16:00+00:00"
}