{"id":"CVE-2026-99043","title":"ice: fix metadata_dst refcount handling on representor teardown","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nice: fix metadata_dst refcount handling on representor teardown\n\nice_eswitch_release_repr() uses metadata_dst_free() to release the\nrepresentor's metadata_dst.  metadat…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 1f263235651775f93c15d90c9f25c3f4a4ef6512","Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 6f5544f53f1e58ea8a49fb9f9158d5793b9205b0","Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < beb05f484a1e4a5a66e3678e4b7f3147f651c080","Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 5e4d20db5179e83a4948927bc39e489a9a83256d","Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 58858b8f14803a7eeac297b3ce20f3b21bf2ff66","Linux 5.16"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T12:22:07.372Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99043","references":[{"url":"https://git.kernel.org/stable/c/1f263235651775f93c15d90c9f25c3f4a4ef6512"},{"url":"https://git.kernel.org/stable/c/6f5544f53f1e58ea8a49fb9f9158d5793b9205b0"},{"url":"https://git.kernel.org/stable/c/beb05f484a1e4a5a66e3678e4b7f3147f651c080"},{"url":"https://git.kernel.org/stable/c/5e4d20db5179e83a4948927bc39e489a9a83256d"},{"url":"https://git.kernel.org/stable/c/58858b8f14803a7eeac297b3ce20f3b21bf2ff66"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.527Z","slug":"CVE-2026-99043","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nice: fix metadata_dst refcount handling on representor teardown\n\nice_eswitch_release_repr() uses metadata_dst_free() to release the\nrepresentor's metadata_dst.  metadata_dst_free() directly frees the\nunderlying memory without checking the dst_entry refcount.\n\nWhen ice_eswitch_port_start_xmit() processes a packet, it takes a\nreference via dst_hold() and attaches the metadata_dst to the skb.\nIf the representor is torn down while packets are still queued on\nthe lower device (e.g. in a qdisc), the metadata_dst is freed while\nreferences are still held.\n\nUse dst_release() instead, which correctly decrements the refcount\nand only frees the object when all references are dropped.  The dst\nsubsystem already handles metadata_dst cleanup in dst_destroy() when\nDST_METADATA is set.\n\nOther drivers sharing this pattern (nfp, airoha, bnxt) already use\ndst_release() for their metadata_dst lifecycle.\n\n## Affected\n\n- `Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 1f263235651775f93c15d90c9f25c3f4a4ef6512`\n- `Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 6f5544f53f1e58ea8a49fb9f9158d5793b9205b0`\n- `Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < beb05f484a1e4a5a66e3678e4b7f3147f651c080`\n- `Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 5e4d20db5179e83a4948927bc39e489a9a83256d`\n- `Linux >= f5396b8a663f7a78ee5b75a47ee524b40795b265 < 58858b8f14803a7eeac297b3ce20f3b21bf2ff66`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}