{"id":"CVE-2022-49350","state":"PUBLISHED","title":"net: mdio: unexport __init-annotated mdio_bus_init()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: unexport __init-annotated mdio_bus_init()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n  - Remove __init\n  - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the only in-tree call-site,\ndrivers/net/phy/phy_device.c is never compiled as modular.\n(CONFIG_PHYLIB is boolean)","publishedAt":"2025-02-26T02:11:03.514Z","updatedAt":"2026-05-11T18:57:59.974Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"ab64ec2c75683f30ccde9eaaf0761002f901aa12","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"5534bcd7c40299862237c4a8fd9c5031b3db1538","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"6a90a44d53428a3bf01bd80df9ba78b19959270c","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"7759c3222815b945a94b212bc0c6cdec475cfec2","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"59fa94cddf9eef8d8dae587373eed8b8f4eb11d7","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"f2f0f8c18b60ca64ff50892ed899cf1c77864755","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"35b42dce619701f1300fb8498dae82c9bb1f0263","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/phy/mdio_bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.122","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/phy/mdio_bus.c"]}],"references":["https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12","https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538","https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c","https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2","https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7","https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3","https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755","https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49350.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49350","state":"PUBLISHED","datePublished":"2025-02-26T02:11:03.514Z","dateUpdated":"2026-05-11T18:57:59.974Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.544Z"},"containers":{"cna":{"title":"net: mdio: unexport __init-annotated mdio_bus_init()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mdio: unexport __init-annotated mdio_bus_init()\n\nEXPORT_SYMBOL and __init is a bad combination because the .init.text\nsection is freed up after the initialization. Hence, modules cannot\nuse symbols annotated __init. The access to a freed symbol may end up\nwith kernel panic.\n\nmodpost used to detect it, but it has been broken for a decade.\n\nRecently, I fixed modpost so it started to warn it again, then this\nshowed up in linux-next builds.\n\nThere are two ways to fix it:\n\n  - Remove __init\n  - Remove EXPORT_SYMBOL\n\nI chose the latter for this case because the only in-tree call-site,\ndrivers/net/phy/phy_device.c is never compiled as modular.\n(CONFIG_PHYLIB is boolean)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"ab64ec2c75683f30ccde9eaaf0761002f901aa12","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"5534bcd7c40299862237c4a8fd9c5031b3db1538","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"6a90a44d53428a3bf01bd80df9ba78b19959270c","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"7759c3222815b945a94b212bc0c6cdec475cfec2","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"59fa94cddf9eef8d8dae587373eed8b8f4eb11d7","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"f2f0f8c18b60ca64ff50892ed899cf1c77864755","versionType":"git"},{"version":"90eff9096c01ba90cdae504a6b95ee87fe2556a3","status":"affected","lessThan":"35b42dce619701f1300fb8498dae82c9bb1f0263","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/phy/mdio_bus.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.122","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/phy/mdio_bus.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ab64ec2c75683f30ccde9eaaf0761002f901aa12"},{"url":"https://git.kernel.org/stable/c/5534bcd7c40299862237c4a8fd9c5031b3db1538"},{"url":"https://git.kernel.org/stable/c/6a90a44d53428a3bf01bd80df9ba78b19959270c"},{"url":"https://git.kernel.org/stable/c/7759c3222815b945a94b212bc0c6cdec475cfec2"},{"url":"https://git.kernel.org/stable/c/59fa94cddf9eef8d8dae587373eed8b8f4eb11d7"},{"url":"https://git.kernel.org/stable/c/f5c68137f1191ba3fcf6260ec71b30be2e2bf4c3"},{"url":"https://git.kernel.org/stable/c/f2f0f8c18b60ca64ff50892ed899cf1c77864755"},{"url":"https://git.kernel.org/stable/c/35b42dce619701f1300fb8498dae82c9bb1f0263"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:57:59.974Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.17.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}