{"api_version":"1","generated_at":"2026-07-23T12:32:48+00:00","cve":"CVE-2025-40347","urls":{"html":"https://cve.report/CVE-2025-40347","api":"https://cve.report/api/cve/CVE-2025-40347.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40347","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40347"},"summary":{"title":"net: enetc: fix the deadlock of enetc_mdio_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: fix the deadlock of enetc_mdio_lock\n\nAfter applying the workaround for err050089, the LS1028A platform\nexperiences RCU stalls on RT kernel. This issue is caused by the\nrecursive acquisition of the read lock enetc_mdio_lock. Here list some\nof the call stacks identified under the enetc_poll path that may lead to\na deadlock:\n\nenetc_poll\n  -> enetc_lock_mdio\n  -> enetc_clean_rx_ring OR napi_complete_done\n     -> napi_gro_receive\n        -> enetc_start_xmit\n           -> enetc_lock_mdio\n           -> enetc_map_tx_buffs\n           -> enetc_unlock_mdio\n  -> enetc_unlock_mdio\n\nAfter enetc_poll acquires the read lock, a higher-priority writer attempts\nto acquire the lock, causing preemption. The writer detects that a\nread lock is already held and is scheduled out. However, readers under\nenetc_poll cannot acquire the read lock again because a writer is already\nwaiting, leading to a thread hang.\n\nCurrently, the deadlock is avoided by adjusting enetc_lock_mdio to prevent\nrecursive lock acquisition.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-12-16 14:15:46","updated_at":"2026-06-01 17:16:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2781ca82ce8cad263d80b617addb727e6a84c9e5","name":"https://git.kernel.org/stable/c/2781ca82ce8cad263d80b617addb727e6a84c9e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a649161526736f48bcc592e3a412e5bcd7dd9e24","name":"https://git.kernel.org/stable/c/a649161526736f48bcc592e3a412e5bcd7dd9e24","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/50bd33f6b3922a6b760aa30d409cae891cec8fb5","name":"https://git.kernel.org/stable/c/50bd33f6b3922a6b760aa30d409cae891cec8fb5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1f92f5bd057a4fad9dab6af17963cdd21e5da6ed","name":"https://git.kernel.org/stable/c/1f92f5bd057a4fad9dab6af17963cdd21e5da6ed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa","name":"https://git.kernel.org/stable/c/2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40347","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40347","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 a649161526736f48bcc592e3a412e5bcd7dd9e24 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 2781ca82ce8cad263d80b617addb727e6a84c9e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 1f92f5bd057a4fad9dab6af17963cdd21e5da6ed git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 50bd33f6b3922a6b760aa30d409cae891cec8fb5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf9c564716a13dde6a990d3b02c27cd6e39608bf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ff966263f5f9fdf9740f03fed0762ce73c230a6a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.24 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.11.7 5.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.115 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.56 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.6 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40347","cve":"CVE-2025-40347","epss":"0.000290000","percentile":"0.088940000","score_date":"2026-06-04","updated_at":"2026-06-05 00:02:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/freescale/enetc/enetc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a649161526736f48bcc592e3a412e5bcd7dd9e24","status":"affected","version":"6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3","versionType":"git"},{"lessThan":"2781ca82ce8cad263d80b617addb727e6a84c9e5","status":"affected","version":"6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3","versionType":"git"},{"lessThan":"1f92f5bd057a4fad9dab6af17963cdd21e5da6ed","status":"affected","version":"6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3","versionType":"git"},{"lessThan":"2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa","status":"affected","version":"6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3","versionType":"git"},{"lessThan":"50bd33f6b3922a6b760aa30d409cae891cec8fb5","status":"affected","version":"6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3","versionType":"git"},{"status":"affected","version":"bf9c564716a13dde6a990d3b02c27cd6e39608bf","versionType":"git"},{"status":"affected","version":"ff966263f5f9fdf9740f03fed0762ce73c230a6a","versionType":"git"},{"lessThan":"5.11","status":"affected","version":"5.10.24","versionType":"semver"},{"lessThan":"5.12","status":"affected","version":"5.11.7","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/freescale/enetc/enetc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.115","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.56","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.115","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.56","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.6","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"5.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: fix the deadlock of enetc_mdio_lock\n\nAfter applying the workaround for err050089, the LS1028A platform\nexperiences RCU stalls on RT kernel. This issue is caused by the\nrecursive acquisition of the read lock enetc_mdio_lock. Here list some\nof the call stacks identified under the enetc_poll path that may lead to\na deadlock:\n\nenetc_poll\n  -> enetc_lock_mdio\n  -> enetc_clean_rx_ring OR napi_complete_done\n     -> napi_gro_receive\n        -> enetc_start_xmit\n           -> enetc_lock_mdio\n           -> enetc_map_tx_buffs\n           -> enetc_unlock_mdio\n  -> enetc_unlock_mdio\n\nAfter enetc_poll acquires the read lock, a higher-priority writer attempts\nto acquire the lock, causing preemption. The writer detects that a\nread lock is already held and is scheduled out. However, readers under\nenetc_poll cannot acquire the read lock again because a writer is already\nwaiting, leading to a thread hang.\n\nCurrently, the deadlock is avoided by adjusting enetc_lock_mdio to prevent\nrecursive lock acquisition."}],"providerMetadata":{"dateUpdated":"2026-06-01T16:05:38.061Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a649161526736f48bcc592e3a412e5bcd7dd9e24"},{"url":"https://git.kernel.org/stable/c/2781ca82ce8cad263d80b617addb727e6a84c9e5"},{"url":"https://git.kernel.org/stable/c/1f92f5bd057a4fad9dab6af17963cdd21e5da6ed"},{"url":"https://git.kernel.org/stable/c/2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa"},{"url":"https://git.kernel.org/stable/c/50bd33f6b3922a6b760aa30d409cae891cec8fb5"}],"title":"net: enetc: fix the deadlock of enetc_mdio_lock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40347","datePublished":"2025-12-16T13:30:21.539Z","dateReserved":"2025-04-16T07:20:57.187Z","dateUpdated":"2026-06-01T16:05:38.061Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-16 14:15:46","lastModifiedDate":"2026-06-01 17:16:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40347","Ordinal":"1","Title":"net: enetc: fix the deadlock of enetc_mdio_lock","CVE":"CVE-2025-40347","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40347","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: fix the deadlock of enetc_mdio_lock\n\nAfter applying the workaround for err050089, the LS1028A platform\nexperiences RCU stalls on RT kernel. This issue is caused by the\nrecursive acquisition of the read lock enetc_mdio_lock. Here list some\nof the call stacks identified under the enetc_poll path that may lead to\na deadlock:\n\nenetc_poll\n  -> enetc_lock_mdio\n  -> enetc_clean_rx_ring OR napi_complete_done\n     -> napi_gro_receive\n        -> enetc_start_xmit\n           -> enetc_lock_mdio\n           -> enetc_map_tx_buffs\n           -> enetc_unlock_mdio\n  -> enetc_unlock_mdio\n\nAfter enetc_poll acquires the read lock, a higher-priority writer attempts\nto acquire the lock, causing preemption. The writer detects that a\nread lock is already held and is scheduled out. However, readers under\nenetc_poll cannot acquire the read lock again because a writer is already\nwaiting, leading to a thread hang.\n\nCurrently, the deadlock is avoided by adjusting enetc_lock_mdio to prevent\nrecursive lock acquisition.","Type":"Description","Title":"net: enetc: fix the deadlock of enetc_mdio_lock"}]}}}