CVE-2026-98604 (GCVE-0-2026-98604)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:19 – Updated: 2026-10-19 09:22
VLAI
Title
ovpn: replace bind when learning local endpoint
Summary
In the Linux kernel, the following vulnerability has been resolved: ovpn: replace bind when learning local endpoint struct ovpn_bind is published through peer->bind with RCU, but local endpoint learning updates bind->local in place under peer->lock. UDP TX reads the field without that lock. In particular, a concurrent IPv6 update can therefore result in a torn address read. Use ovpn_peer_reset_sockaddr to publish a replacement bind when learning a new local endpoint, just as a remote endpoint change does. Preserve the current remote address and reset the dst cache only after the new bind has been published successfully. Track remote endpoint changes separately so that float notification and transport-address rehashing remain limited to actual peer floats.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f0281c1d3732d1ec084fa1e06d1767d33e1a570e , < 21dbc9f4d0bdd3b22f91beabc7840064bf11594f (git)
Affected: f0281c1d3732d1ec084fa1e06d1767d33e1a570e , < e283009151d3d131447c2edda500199c5fda5f72 (git)
Affected: f0281c1d3732d1ec084fa1e06d1767d33e1a570e , < aea934a221ec6a867221e5b765f65f1857befd53 (git)
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Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when learning local endpoint\n\nstruct ovpn_bind is published through peer-\u003ebind with RCU, but local\nendpoint learning updates bind-\u003elocal in place under peer-\u003elock. UDP TX\nreads the field without that lock. In particular, a concurrent IPv6\nupdate can therefore result in a torn address read.\n\nUse ovpn_peer_reset_sockaddr to publish a replacement bind when learning\na new local endpoint, just as a remote endpoint change does. Preserve\nthe current remote address and reset the dst cache only after the new\nbind has been published successfully.\n\nTrack remote endpoint changes separately so that float notification and\ntransport-address rehashing remain limited to actual peer floats."
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      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:22:31.480Z",
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    "datePublished": "2026-10-18T15:19:17.227Z",
    "dateReserved": "2026-09-25T10:25:14.359Z",
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    "state": "PUBLISHED"
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        "descriptions": [
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when learning local endpoint\n\nstruct ovpn_bind is published through peer-\u003ebind with RCU, but local\nendpoint learning updates bind-\u003elocal in place under peer-\u003elock. UDP TX\nreads the field without that lock. In particular, a concurrent IPv6\nupdate can therefore result in a torn address read.\n\nUse ovpn_peer_reset_sockaddr to publish a replacement bind when learning\na new local endpoint, just as a remote endpoint change does. Preserve\nthe current remote address and reset the dst cache only after the new\nbind has been published successfully.\n\nTrack remote endpoint changes separately so that float notification and\ntransport-address rehashing remain limited to actual peer floats."
          }
        ],
        "id": "CVE-2026-98604",
        "lastModified": "2026-10-19T10:19:22.180",
        "metrics": {},
        "published": "2026-10-18T16:17:13.140",
        "references": [
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98604.json",
      "version": "3"
    }
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}



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