{"id":"CVE-2022-48815","state":"PUBLISHED","title":"net: dsa: bcm_sf2: don't use devres for mdiobus","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: bcm_sf2: 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 Starfighter 2 is a platform device, so the initial set of\nconstraints that I thought would cause this (I2C or SPI buses which call\n->remove on ->shutdown) do not apply. But there is one more which\napplies 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 bcm_sf2 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 bcm_sf2 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":"2024-07-16T11:44:03.971Z","updatedAt":"2026-05-11T18:47:40.094Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"2770b795294ed312375c11ef1d0b810499c66b83","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"caabb5f64f5c32fceed93356bb688ef1ec6c5783","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"08e1a3554e99a1a5bd2835907381e2383ee85cae","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"08f1a20822349004bb9cc1b153ecb516e9f2889d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/bcm_sf2.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/bcm_sf2.c"]}],"references":["https://git.kernel.org/stable/c/2770b795294ed312375c11ef1d0b810499c66b83","https://git.kernel.org/stable/c/caabb5f64f5c32fceed93356bb688ef1ec6c5783","https://git.kernel.org/stable/c/08e1a3554e99a1a5bd2835907381e2383ee85cae","https://git.kernel.org/stable/c/08f1a20822349004bb9cc1b153ecb516e9f2889d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48815.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48815","state":"PUBLISHED","datePublished":"2024-07-16T11:44:03.971Z","dateUpdated":"2026-05-11T18:47:40.094Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-07-16T11:38:08.900Z"},"containers":{"cna":{"title":"net: dsa: bcm_sf2: don't use devres for mdiobus","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: bcm_sf2: 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 Starfighter 2 is a platform device, so the initial set of\nconstraints that I thought would cause this (I2C or SPI buses which call\n->remove on ->shutdown) do not apply. But there is one more which\napplies 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 bcm_sf2 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 bcm_sf2 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":"2770b795294ed312375c11ef1d0b810499c66b83","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"caabb5f64f5c32fceed93356bb688ef1ec6c5783","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"08e1a3554e99a1a5bd2835907381e2383ee85cae","versionType":"git"},{"version":"ac3a68d56651c3dad2c12c7afce065fe15267f44","status":"affected","lessThan":"08f1a20822349004bb9cc1b153ecb516e9f2889d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/dsa/bcm_sf2.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/bcm_sf2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2770b795294ed312375c11ef1d0b810499c66b83"},{"url":"https://git.kernel.org/stable/c/caabb5f64f5c32fceed93356bb688ef1ec6c5783"},{"url":"https://git.kernel.org/stable/c/08e1a3554e99a1a5bd2835907381e2383ee85cae"},{"url":"https://git.kernel.org/stable/c/08f1a20822349004bb9cc1b153ecb516e9f2889d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:47:40.094Z"},"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/2770b795294ed312375c11ef1d0b810499c66b83","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/caabb5f64f5c32fceed93356bb688ef1ec6c5783","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/08e1a3554e99a1a5bd2835907381e2383ee85cae","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/08f1a20822349004bb9cc1b153ecb516e9f2889d","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T15:25:01.612Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48815","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:58:18.935490Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:34:12.735Z"}}]}}}