{"api_version":"1","generated_at":"2026-10-29T10:21:24+00:00","cve":"CVE-2023-54040","urls":{"html":"https://cve.report/CVE-2023-54040","api":"https://cve.report/api/cve/CVE-2023-54040.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-54040","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-54040"},"summary":{"title":"ice: fix wrong fallback logic for FDIR","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nice: fix wrong fallback logic for FDIR\n\nWhen adding a FDIR filter, if ice_vc_fdir_set_irq_ctx returns failure,\nthe inserted fdir entry will not be removed and if ice_vc_fdir_write_fltr\nreturns failure, the fdir context info for irq handler will not be cleared\nwhich may lead to inconsistent or memory leak issue. 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This patch refines\nfailure cases to resolve this issue."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only via virtchnl mailbox messages sent by a Virtual Function over the PCIe/admin-queue interface, not from network packets; the attacker must be attached to the machine as a VF owner (typically a passed-through SR-IOV device in a guest VM).\nAC:L - The failing path is `ice_vc_fdir_set_irq_ctx()` returning -EBUSY, which the VF triggers deterministically by issuing two ADD_FDIR_FILTER requests inside the ~10 ms in-flight window it fully controls; heap reclaim of the freed `conf` uses the identical same-size devm allocation issued by simply adding more filters.\nPR:L - From the perspective of the vulnerable component (the host PF driver), the attacker holds only the low privilege of controlling an assigned VF — no host credentials, no capability check, and no authorization exists on the virtchnl handler path beyond the opcode allowlist.\nUI:N - Exploitation is entirely driven by mailbox messages the attacker emits; no action by a host administrator or any other user is needed.\nS:C - The attacker acts from a VF (normally owned by an untrusted guest/tenant) while the corrupted IDR, list and freed memory belong to the host PF driver, so the impact crosses the guest-to-host security authority boundary — consistent with how sibling i40e VF→PF CVEs are scored.\nC:H - The dangling IDR entry lets a subsequent DEL_FDIR_FILTER read the reclaimed object and program hardware filter state from it, and the corrupted list is walked on every later add, giving use-after-free reads of arbitrary host kernel heap contents.\nI:H - The stale `fltr_node` yields `list_del()`/`list_add()` writes through attacker-groomed freed memory, and `ice_vc_fdir_flush_entry()` double-frees the same `conf`, providing write and heap-metadata corruption primitives sufficient for control-flow hijack in the host kernel.\nA:H - Use-after-free, list corruption and double free in the host PF driver reliably produce oops/panic and can be re-triggered at will by the VF, taking down the host and every other tenant sharing the adapter."}]}],"providerMetadata":{"dateUpdated":"2026-08-05T09:16:41.015Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/391d28c0e38c0e5b11a4240a2b4976cf63e87f45"},{"url":"https://git.kernel.org/stable/c/aad3b871efe26f36f45f8b4649653b5d3fd9c35e"},{"url":"https://git.kernel.org/stable/c/cbfed5f114b5310f221979fc8190f55c6abc3400"},{"url":"https://git.kernel.org/stable/c/b4a01ace20f5c93c724abffc0a83ec84f514b98d"}],"title":"ice: fix wrong fallback logic for FDIR","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-54040","datePublished":"2025-12-24T10:56:06.094Z","dateReserved":"2025-12-24T10:53:46.181Z","dateUpdated":"2026-10-15T21:41:38.132Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-24 11:15:56","lastModifiedDate":"2026-10-15 22:17:51","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2,"impactScore":6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T21:37:55.813707Z","id":"CVE-2023-54040","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"54040","Ordinal":"1","Title":"ice: fix wrong fallback logic for FDIR","CVE":"CVE-2023-54040","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"54040","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nice: fix wrong fallback logic for FDIR\n\nWhen adding a FDIR filter, if ice_vc_fdir_set_irq_ctx returns failure,\nthe inserted fdir entry will not be removed and if ice_vc_fdir_write_fltr\nreturns failure, the fdir context info for irq handler will not be cleared\nwhich may lead to inconsistent or memory leak issue. This patch refines\nfailure cases to resolve this issue.","Type":"Description","Title":"ice: fix wrong fallback logic for FDIR"}]}}}