{"id":"CVE-2022-48812","state":"PUBLISHED","title":"net: dsa: lantiq_gswip: don't use devres for mdiobus","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: lantiq_gswip: don't use devres for mdiobus\n\nAs explained in commits:\n74b6d7d13307 (\"net: dsa: realtek: register the MDIO bus under devres\")\n5135e96a3dd2 (\"net: dsa: don't allocate the slave_mii_bus using devres\")\n\nmdiobus_free() will panic when called from devm_mdiobus_free() <-\ndevres_release_all() <- __device_release_driver(), and that mdiobus was\nnot previously unregistered.\n\nThe GSWIP switch is a platform device, so the initial set of constraints\nthat I thought would cause this (I2C or SPI buses which call ->remove on\n->shutdown) do not apply. But there is one more which applies here.\n\nIf the DSA master itself is on a bus that calls ->remove from ->shutdown\n(like dpaa2-eth, which is on the fsl-mc bus), there is a device link\nbetween the switch and the DSA master, and device_links_unbind_consumers()\nwill unbind the GSWIP switch driver on shutdown.\n\nSo the same treatment must be applied to all DSA switch drivers, which\nis: either use devres for both the mdiobus allocation and registration,\nor don't use devres at all.\n\nThe gswip driver has the code structure in place for orderly mdiobus\nremoval, so just replace devm_mdiobus_alloc() with the non-devres\nvariant, and add manual free where necessary, to ensure that we don't\nlet devres free a still-registered bus.","publishedAt":"2024-07-16T11:44:01.907Z","updatedAt":"2026-05-11T18:47:36.711Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"e177d2e85ebcd3008c4b2abc293f4118e04eedef","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"b5652bc50dde7b84e93dfb25479b64b817e377c1","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"2443ba2fe396bdde187a2fdfa6a57375643ae93c","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"0d120dfb5d67edc5bcd1804e167dba2b30809afd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/lantiq_gswip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.9","versionType":"semver"},{"version":"5.10.101","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.24","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.10","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/lantiq_gswip.c"]}],"references":["https://git.kernel.org/stable/c/e177d2e85ebcd3008c4b2abc293f4118e04eedef","https://git.kernel.org/stable/c/b5652bc50dde7b84e93dfb25479b64b817e377c1","https://git.kernel.org/stable/c/2443ba2fe396bdde187a2fdfa6a57375643ae93c","https://git.kernel.org/stable/c/0d120dfb5d67edc5bcd1804e167dba2b30809afd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48812.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48812","state":"PUBLISHED","datePublished":"2024-07-16T11:44:01.907Z","dateUpdated":"2026-05-11T18:47:36.711Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-07-16T11:38:08.898Z"},"containers":{"cna":{"title":"net: dsa: lantiq_gswip: don't use devres for mdiobus","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: lantiq_gswip: don't use devres for mdiobus\n\nAs explained in commits:\n74b6d7d13307 (\"net: dsa: realtek: register the MDIO bus under devres\")\n5135e96a3dd2 (\"net: dsa: don't allocate the slave_mii_bus using devres\")\n\nmdiobus_free() will panic when called from devm_mdiobus_free() <-\ndevres_release_all() <- __device_release_driver(), and that mdiobus was\nnot previously unregistered.\n\nThe GSWIP switch is a platform device, so the initial set of constraints\nthat I thought would cause this (I2C or SPI buses which call ->remove on\n->shutdown) do not apply. But there is one more which applies here.\n\nIf the DSA master itself is on a bus that calls ->remove from ->shutdown\n(like dpaa2-eth, which is on the fsl-mc bus), there is a device link\nbetween the switch and the DSA master, and device_links_unbind_consumers()\nwill unbind the GSWIP switch driver on shutdown.\n\nSo the same treatment must be applied to all DSA switch drivers, which\nis: either use devres for both the mdiobus allocation and registration,\nor don't use devres at all.\n\nThe gswip driver has the code structure in place for orderly mdiobus\nremoval, so just replace devm_mdiobus_alloc() with the non-devres\nvariant, and add manual free where necessary, to ensure that we don't\nlet devres free a still-registered bus."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"e177d2e85ebcd3008c4b2abc293f4118e04eedef","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"b5652bc50dde7b84e93dfb25479b64b817e377c1","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"2443ba2fe396bdde187a2fdfa6a57375643ae93c","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"0d120dfb5d67edc5bcd1804e167dba2b30809afd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/lantiq_gswip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.9","versionType":"semver"},{"version":"5.10.101","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.24","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16.10","status":"unaffected","lessThanOrEqual":"5.16.*","versionType":"semver"},{"version":"5.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/lantiq_gswip.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e177d2e85ebcd3008c4b2abc293f4118e04eedef"},{"url":"https://git.kernel.org/stable/c/b5652bc50dde7b84e93dfb25479b64b817e377c1"},{"url":"https://git.kernel.org/stable/c/2443ba2fe396bdde187a2fdfa6a57375643ae93c"},{"url":"https://git.kernel.org/stable/c/0d120dfb5d67edc5bcd1804e167dba2b30809afd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:47:36.711Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.10.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.15.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.16.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/e177d2e85ebcd3008c4b2abc293f4118e04eedef","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/b5652bc50dde7b84e93dfb25479b64b817e377c1","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2443ba2fe396bdde187a2fdfa6a57375643ae93c","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/0d120dfb5d67edc5bcd1804e167dba2b30809afd","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T15:25:01.549Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48812","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:58:28.399914Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:34:13.070Z"}}]}}}