bpf: Fix tcx/netkit detach permissions when prog fd isn't given

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Summary

CVECVE-2026-45932
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:09 UTC
Updated2026-05-30 11:17:16 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Fix tcx/netkit detach permissions when prog fd isn't given This commit fixes a security issue where BPF_PROG_DETACH on tcx or netkit devices could be executed by any user when no program fd was provided, bypassing permission checks. The fix adds a capability check for CAP_NET_ADMIN or CAP_SYS_ADMIN in this case.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000110000 probability, percentile 0.013740000 (date 2026-06-02)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e420bed025071a623d2720a92bc2245c84757ecb 4e0772cded109c238411f2fac36ac39302758b81 git Not specified
CNA Linux Linux affected e420bed025071a623d2720a92bc2245c84757ecb 3f04cc1e5374da4c5e791ae010a06cfea7bacbe6 git Not specified
CNA Linux Linux affected e420bed025071a623d2720a92bc2245c84757ecb ae23bc81ddf7c17b663c4ed1b21e35527b0a7131 git Not specified
CNA Linux Linux affected 6.6 Not specified
CNA Linux Linux unaffected 6.6 semver Not specified
CNA Linux Linux unaffected 6.18.14 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.4 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3f04cc1e5374da4c5e791ae010a06cfea7bacbe6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4e0772cded109c238411f2fac36ac39302758b81 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae23bc81ddf7c17b663c4ed1b21e35527b0a7131 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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