net: fix stack overflow when LRO is disabled for virtual interfaces

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54012
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-24 11:15:54 UTC
Updated2026-08-04 10:19:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: fix stack overflow when LRO is disabled for virtual interfaces When the virtual interface's feature is updated, it synchronizes the updated feature for its own lower interface. This propagation logic should be worked as the iteration, not recursively. But it works recursively due to the netdev notification unexpectedly. This problem occurs when it disables LRO only for the team and bonding interface type. team0 | +------+------+-----+-----+ | | | | | team1 team2 team3 ... team200 If team0's LRO feature is updated, it generates the NETDEV_FEAT_CHANGE event to its own lower interfaces(team1 ~ team200). It is worked by netdev_sync_lower_features(). So, the NETDEV_FEAT_CHANGE notification logic of each lower interface work iteratively. But generated NETDEV_FEAT_CHANGE event is also sent to the upper interface too. upper interface(team0) generates the NETDEV_FEAT_CHANGE event for its own lower interfaces again. lower and upper interfaces receive this event and generate this event again and again. So, the stack overflow occurs. But it is not the infinite loop issue. Because the netdev_sync_lower_features() updates features before generating the NETDEV_FEAT_CHANGE event. Already synchronized lower interfaces skip notification logic. So, it is just the problem that iteration logic is changed to the recursive unexpectedly due to the notification mechanism. Reproducer: ip link add team0 type team ethtool -K team0 lro on for i in {1..200} do ip link add team$i master team0 type team ethtool -K team$i lro on done ethtool -K team0 lro off In order to fix it, the notifier_ctx member of bonding/team is introduced.

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: 0.001490000 probability, percentile 0.045440000 (date 2026-08-06)

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 fd867d51f889aec11cca235ebb008578780d052d 9ea0c5f90a27b5b884d880e146e0f65f3052e401 git Not specified
CNA Linux Linux affected fd867d51f889aec11cca235ebb008578780d052d 4bb955c4d2830a58c08e2a48ab75d75368e3ff36 git Not specified
CNA Linux Linux affected fd867d51f889aec11cca235ebb008578780d052d cf3b5cd7127cc10c5b12400c545f263f0e5e715c git Not specified
CNA Linux Linux affected fd867d51f889aec11cca235ebb008578780d052d ed66e6327a69fec95034cda2ac5b6a57b8b3b622 git Not specified
CNA Linux Linux affected fd867d51f889aec11cca235ebb008578780d052d 6bf00bb3dc7e5b9fb05488e11616e65d64e975fa git Not specified
CNA Linux Linux affected fd867d51f889aec11cca235ebb008578780d052d ae9b15fbe63447bc1d3bba3769f409d17ca6fdf6 git Not specified
CNA Linux Linux affected 4.4 Not specified
CNA Linux Linux unaffected 4.4 semver Not specified
CNA Linux Linux unaffected 5.4.244 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.181 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.114 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.31 6.1.* semver Not specified
CNA Linux Linux unaffected 6.3.5 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/cf3b5cd7127cc10c5b12400c545f263f0e5e715c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9ea0c5f90a27b5b884d880e146e0f65f3052e401 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed66e6327a69fec95034cda2ac5b6a57b8b3b622 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6bf00bb3dc7e5b9fb05488e11616e65d64e975fa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4bb955c4d2830a58c08e2a48ab75d75368e3ff36 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae9b15fbe63447bc1d3bba3769f409d17ca6fdf6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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