{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-54040","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T10:53:46.181Z","datePublished":"2025-12-24T10:56:06.094Z","dateUpdated":"2026-08-05T09:16:41.015Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T09:16:41.015Z"},"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"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"},"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."}]}],"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_virtchnl_fdir.c"],"versions":[{"version":"1f7ea1cd6a3748427512ccc9582e18cd9efea966","lessThan":"391d28c0e38c0e5b11a4240a2b4976cf63e87f45","status":"affected","versionType":"git"},{"version":"1f7ea1cd6a3748427512ccc9582e18cd9efea966","lessThan":"aad3b871efe26f36f45f8b4649653b5d3fd9c35e","status":"affected","versionType":"git"},{"version":"1f7ea1cd6a3748427512ccc9582e18cd9efea966","lessThan":"cbfed5f114b5310f221979fc8190f55c6abc3400","status":"affected","versionType":"git"},{"version":"1f7ea1cd6a3748427512ccc9582e18cd9efea966","lessThan":"b4a01ace20f5c93c724abffc0a83ec84f514b98d","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_virtchnl_fdir.c"],"versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"5.15.107","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.24","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.11","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","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":"5.13","versionEndExcluding":"5.15.107"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.3"}]}]}],"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"}}}}