CVE-2026-98895

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98895", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.378Z", "datePublished": "2026-10-23T11:37:56.618Z", "dateUpdated": "2026-10-26T06:56:21.757Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-26T06:56:21.757Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, Handle destroying table that has a miss table\n\nIf a table has a miss table that was created by\n'mlx5hws_table_set_default_miss' API function, its miss_tbl\nkeeps the table that points to it in a list.\nIf such table is deleted, we need to also remove it from the\nmiss_tbl list, otherwise the node in miss_tbl list will contain\ngarbage."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - RTM_NEWTFILTER/RTM_DELTFILTER reaches tc_new_tfilter/tc_del_tfilter, mlx5e flower offload, mlx5_destroy_flow_table(), and the patched mlx5hws_table_destroy(); network packets only traverse installed rules and cannot create the stale list node.\nAC:H - mlx5_cmd_hws_destroy_flow_table() normally removes the miss link through mlx5_fs_set_ft_default_miss(NULL); the stale node requires its mlx5hws_cmd_flow_table_modify() disconnect to fail while destruction continues, a firmware/device condition the TC actor cannot reliably induce.\nPR:L - rtnetlink_rcv_msg() gates RTM_*TFILTER with netlink_net_capable(CAP_NET_ADMIN), which uses the socket network namespace's user_ns. CAP_NET_ADMIN in a delegated netns containing an mlx5 representor suffices; mlx5e_setup_tc_block_cb() adds no init-user-namespace check.\nUI:N - Once an HMFS switchdev device is configured, the TC actor can issue the filter deletion and subsequent table or matcher operation directly; no action by another user is required.\nS:U - The dangling mlx5hws_table is consumed within the host mlx5 driver and kernel allocator; exploitation affects the same kernel security authority rather than crossing a VM, IOMMU, or other scope boundary.\nC:H - mlx5hws_table_update_connected_miss_tables() treats the freed list entry as a live src_tbl and dereferences its ctx, matchers_list, IDs, and other pointers, giving a reclaim-and-spray attacker UAF-based kernel-memory read potential.\nI:H - list_add() can write a new-node pointer through the stale freed list entry, and mlx5hws_table_connect_to_miss_table() later writes src_tbl->default_miss.miss_tbl through that UAF; controlled slab reuse can convert these writes into exploitable heap corruption.\nA:H - Walking the freed default_miss.next entry and dereferencing a reclaimed src_tbl can corrupt list state or fault on bogus ctx and matcher pointers, causing a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/steering/hws/table.c"], "versions": [{"version": "9fc43b5e3933a7e5924ba83d7561399d439de5bb", "lessThan": "6efdc212627cecf33b594256ae4460b4c52a126a", "status": "affected", "versionType": "git"}, {"version": "9fc43b5e3933a7e5924ba83d7561399d439de5bb", "lessThan": "60e9e82f162ab7399373ff2185119289e4f6dc06", "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/mellanox/mlx5/core/steering/hws/table.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.14", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6efdc212627cecf33b594256ae4460b4c52a126a"}, {"url": "https://git.kernel.org/stable/c/60e9e82f162ab7399373ff2185119289e4f6dc06"}], "title": "net/mlx5: HWS, Handle destroying table that has a miss table", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/steering/hws/table.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6efdc212627cecf33b594256ae4460b4c52a126a", "status": "affected", "version": "9fc43b5e3933a7e5924ba83d7561399d439de5bb", "versionType": "git"}, {"lessThan": "60e9e82f162ab7399373ff2185119289e4f6dc06", "status": "affected", "version": "9fc43b5e3933a7e5924ba83d7561399d439de5bb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/steering/hws/table.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnet/mlx5: HWS, Handle destroying table that has a miss table\n\nIf a table has a miss table that was created by\n'mlx5hws_table_set_default_miss' API function, its miss_tbl\nkeeps the table that points to it in a list.\nIf such table is deleted, we need to also remove it from the\nmiss_tbl list, otherwise the node in miss_tbl list will contain\ngarbage."}], "id": "CVE-2026-98895", "lastModified": "2026-10-26T07:17:14.743", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-23T12:18:23.433", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60e9e82f162ab7399373ff2185119289e4f6dc06"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6efdc212627cecf33b594256ae4460b4c52a126a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/mlx5: HWS, Handle destroying table that has a miss table", "id": "2559558", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559558"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/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:\nnet/mlx5: HWS, Handle destroying table that has a miss table\nIf a table has a miss table that was created by\n'mlx5hws_table_set_default_miss' API function, its miss_tbl\nkeeps the table that points to it in a list.\nIf such table is deleted, we need to also remove it from the\nmiss_tbl list, otherwise the node in miss_tbl list will contain\ngarbage.", "A flaw was found in the Linux kernel's mlx5 network driver. When destroying a hardware steering table configured with a default miss table, the driver fails to remove the entry from the associated miss table tracking list, leaving behind an invalid pointer. A local privileged user could exploit this vulnerability during table cleanup to cause memory corruption, potentially leading to a Denial of Service (DoS) via a system crash."], "name": "CVE-2026-98895", "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": "Out of support scope", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "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-2026-98895\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98895\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98895.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,16b81428f7b5f253ab30a998bc4f4ecd1c8823f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6efdc212627cecf33b594256ae4460b4c52a126a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,60e9e82f162ab7399373ff2185119289e4f6dc06)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,16b81428f7b5f253ab30a998bc4f4ecd1c8823f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6efdc212627cecf33b594256ae4460b4c52a126a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,60e9e82f162ab7399373ff2185119289e4f6dc06)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-10-23T14:15:07.097121+00:00", "updated": "2026-10-27T10:45:06.392950+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}