ice: fix metadata_dst refcount handling on representor teardown

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-99043
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 13:17:27 UTC
Updated2026-10-23 13:17:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ice: fix metadata_dst refcount handling on representor teardown ice_eswitch_release_repr() uses metadata_dst_free() to release the representor's metadata_dst. metadata_dst_free() directly frees the underlying memory without checking the dst_entry refcount. When ice_eswitch_port_start_xmit() processes a packet, it takes a reference via dst_hold() and attaches the metadata_dst to the skb. If the representor is torn down while packets are still queued on the lower device (e.g. in a qdisc), the metadata_dst is freed while references are still held. Use dst_release() instead, which correctly decrements the refcount and only frees the object when all references are dropped. The dst subsystem already handles metadata_dst cleanup in dst_destroy() when DST_METADATA is set. Other drivers sharing this pattern (nfp, airoha, bnxt) already use dst_release() for their metadata_dst lifecycle.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f5396b8a663f7a78ee5b75a47ee524b40795b265 1f263235651775f93c15d90c9f25c3f4a4ef6512 git Not specified
CNA Linux Linux affected f5396b8a663f7a78ee5b75a47ee524b40795b265 6f5544f53f1e58ea8a49fb9f9158d5793b9205b0 git Not specified
CNA Linux Linux affected f5396b8a663f7a78ee5b75a47ee524b40795b265 beb05f484a1e4a5a66e3678e4b7f3147f651c080 git Not specified
CNA Linux Linux affected f5396b8a663f7a78ee5b75a47ee524b40795b265 5e4d20db5179e83a4948927bc39e489a9a83256d git Not specified
CNA Linux Linux affected f5396b8a663f7a78ee5b75a47ee524b40795b265 58858b8f14803a7eeac297b3ce20f3b21bf2ff66 git Not specified
CNA Linux Linux affected 5.16 Not specified
CNA Linux Linux unaffected 5.16 semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6f5544f53f1e58ea8a49fb9f9158d5793b9205b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1f263235651775f93c15d90c9f25c3f4a4ef6512 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5e4d20db5179e83a4948927bc39e489a9a83256d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/beb05f484a1e4a5a66e3678e4b7f3147f651c080 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/58858b8f14803a7eeac297b3ce20f3b21bf2ff66 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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