net: mana: Skip redundant detach on already-detached port

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63972
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:16 UTC
Updated2026-07-20 15:16:59 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: mana: Skip redundant detach on already-detached port When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown. Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001980000 probability, percentile 0.097890000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fb9f98e1041a30dd5766620a2a64cb472b54caa9 c4152b4e28b3e550ec99351bf900e2c24c2608cc git Not specified
CNA Linux Linux affected 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 7ae590797f9b5c240aaea5773f5f00977a42a846 git Not specified
CNA Linux Linux affected 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 5b05aa36ee24297d7296ca58dfd8c448d0e4cda3 git Not specified
CNA Linux Linux affected 6.18.33 6.18.35 semver Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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