CVE-2026-99043

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99043", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.387Z", "datePublished": "2026-10-23T12:22:07.372Z", "dateUpdated": "2026-10-30T12:41:15.899Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:15.899Z"}, "descriptions": [{"lang": "en", "value": "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. 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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/ice/ice_eswitch.c"], "versions": [{"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "41f0d9ab158fb51f34bded5f8a40918e4f70b2b6", "status": "affected", "versionType": "git"}, {"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "1f263235651775f93c15d90c9f25c3f4a4ef6512", "status": "affected", "versionType": "git"}, {"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "6f5544f53f1e58ea8a49fb9f9158d5793b9205b0", "status": "affected", "versionType": "git"}, {"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "beb05f484a1e4a5a66e3678e4b7f3147f651c080", "status": "affected", "versionType": "git"}, {"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "5e4d20db5179e83a4948927bc39e489a9a83256d", "status": "affected", "versionType": "git"}, {"version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "lessThan": "58858b8f14803a7eeac297b3ce20f3b21bf2ff66", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/ice/ice_eswitch.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/41f0d9ab158fb51f34bded5f8a40918e4f70b2b6"}, {"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"}], "title": "ice: fix metadata_dst refcount handling on representor teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/intel/ice/ice_eswitch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "41f0d9ab158fb51f34bded5f8a40918e4f70b2b6", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}, {"lessThan": "1f263235651775f93c15d90c9f25c3f4a4ef6512", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}, {"lessThan": "6f5544f53f1e58ea8a49fb9f9158d5793b9205b0", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}, {"lessThan": "beb05f484a1e4a5a66e3678e4b7f3147f651c080", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}, {"lessThan": "5e4d20db5179e83a4948927bc39e489a9a83256d", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}, {"lessThan": "58858b8f14803a7eeac297b3ce20f3b21bf2ff66", "status": "affected", "version": "f5396b8a663f7a78ee5b75a47ee524b40795b265", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/intel/ice/ice_eswitch.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.16"}, {"lessThan": "5.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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. 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."}], "id": "CVE-2026-99043", "lastModified": "2026-10-30T13:21:41.453", "metrics": {}, "published": "2026-10-23T13:17:27.723", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1f263235651775f93c15d90c9f25c3f4a4ef6512"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41f0d9ab158fb51f34bded5f8a40918e4f70b2b6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/58858b8f14803a7eeac297b3ce20f3b21bf2ff66"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e4d20db5179e83a4948927bc39e489a9a83256d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f5544f53f1e58ea8a49fb9f9158d5793b9205b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/beb05f484a1e4a5a66e3678e4b7f3147f651c080"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ice: fix metadata_dst refcount handling on representor teardown", "id": "2559795", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559795"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nice: fix metadata_dst refcount handling on representor teardown\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.\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.\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.\nOther drivers sharing this pattern (nfp, airoha, bnxt) already use\ndst_release() for their metadata_dst lifecycle.", "A flaw was found in the Linux kernel's Intel Ethernet (ice) driver. This vulnerability can lead to a denial of service (DoS) caused by a use-after-free condition when network routing metadata is freed prematurely during representor interface teardown while packets remain queued for transmission. A privileged local user could trigger this flaw by tearing down representor interfaces during active network traffic, causing a kernel crash and system instability."], "name": "CVE-2026-99043", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99043\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99043\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99043.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,1f263235651775f93c15d90c9f25c3f4a4ef6512)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,6f5544f53f1e58ea8a49fb9f9158d5793b9205b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,beb05f484a1e4a5a66e3678e4b7f3147f651c080)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,5e4d20db5179e83a4948927bc39e489a9a83256d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,58858b8f14803a7eeac297b3ce20f3b21bf2ff66)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,1f263235651775f93c15d90c9f25c3f4a4ef6512)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,6f5544f53f1e58ea8a49fb9f9158d5793b9205b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,beb05f484a1e4a5a66e3678e4b7f3147f651c080)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,5e4d20db5179e83a4948927bc39e489a9a83256d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f5396b8a663f7a78ee5b75a47ee524b40795b265,58858b8f14803a7eeac297b3ce20f3b21bf2ff66)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T17:00:15.614179+00:00", "updated": "2026-10-29T20:30:18.897290+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-825"]}