openvswitch: avoid reallocating confirmed conntrack labels

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98251
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:13 UTC
Updated2026-10-19 10:18:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: openvswitch: avoid reallocating confirmed conntrack labels ovs_ct_get_conn_labels() adds the labels extension when a conntrack entry does not have one. Confirmed conntracks can be read locklessly, so adding an extension may reallocate and free the extension block while another CPU accesses it. Only add the extension for unconfirmed conntracks. A confirmed conntrack without labels now fails the caller's label operation instead of reallocating its extension storage.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001840000 probability, percentile 0.073030000 (date 2026-10-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 4371d79ea74407fb992c985b1f94391e35bb8289 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 7ff688aceada1160331a789385ea146f62fbddf7 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 05eab8dced6bf4d3009a6eeee16ddac99047dc83 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 579d87ec1e1e85729a6cb2c25961e58beb78640c git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 2e6dd889c325abf23821e1459c3ffef59b7f0009 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b d16f089bd700f45d720ce989d5495e1dc3be0cf8 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 8c9fcc6c33950d3db551af664d1fd3d998bfee56 git Not specified
CNA Linux Linux affected c2ac667358708d7cce64c78f58af6adf4c1e848b 3f118c8217c109fd13ca61caa301d72c483897ef git Not specified
CNA Linux Linux affected 4.3 Not specified
CNA Linux Linux unaffected 4.3 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d16f089bd700f45d720ce989d5495e1dc3be0cf8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7ff688aceada1160331a789385ea146f62fbddf7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/579d87ec1e1e85729a6cb2c25961e58beb78640c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2e6dd889c325abf23821e1459c3ffef59b7f0009 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4371d79ea74407fb992c985b1f94391e35bb8289 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3f118c8217c109fd13ca61caa301d72c483897ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/05eab8dced6bf4d3009a6eeee16ddac99047dc83 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8c9fcc6c33950d3db551af664d1fd3d998bfee56 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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