{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42224", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.250Z", "datePublished": "2024-07-30T07:47:05.608Z", "dateUpdated": "2026-08-05T11:35:55.054Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:55.054Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mv88e6xxx: Correct check for empty list\n\nSince commit a3c53be55c95 (\"net: dsa: mv88e6xxx: Support multiple MDIO\nbusses\") mv88e6xxx_default_mdio_bus() has checked that the\nreturn value of list_first_entry() is non-NULL.\n\nThis appears to be intended to guard against the list chip->mdios being\nempty. However, it is not the correct check as the implementation of\nlist_first_entry is not designed to return NULL for empty lists.\n\nInstead, use list_first_entry_or_null() which does return NULL if the\nlist is empty.\n\nFlagged by Smatch.\nCompile tested only." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The only entry points are driver probe/`mv88e6xxx_setup()` on a DT-described Marvell DSA switch and local netdev management paths (ifup, ethtool/PHY and SERDES register access) that funnel into `mv88e6xxx_phy_read/write*()` and the PCS init routines; no received packet or remote peer data reaches `mv88e6xxx_default_mdio_bus()`.\nAC:H - The flaw only manifests when `chip->mdios` is empty, but `mv88e6xxx_mdios_register()` unconditionally registers the internal MDIO bus and aborts setup on failure, and `mv88e6xxx_mdios_unregister()` never `list_del`s entries, so the empty-list state is an internal driver condition an attacker cannot create or influence by any sequence of actions.\nPR:L - Post-boot the affected helpers are driven from the DSA user port's MDIO/PHY and SERDES read paths, which a local unprivileged account with access to the switch netdev can exercise; no CAP_NET_ADMIN or root is needed to reach the read side.\nUI:N - The affected paths run automatically during driver probe, port setup and link bring-up, and the PHY/SERDES reads can be driven by the attacker's own process; no victim action is required.\nS:U - The bogus pointer, its dereference and any resulting corruption stay entirely within the kernel's own security authority, with no VM, IOMMU or sandbox boundary crossed.\nC:H - The helper returns `chip->reset` (a `struct gpio_desc *`) reinterpreted as a `struct mii_bus *` — type confusion that makes the MDIO layer read fields from an unrelated kernel object, and the resulting register values are surfaced back to userspace through the MDIO/PHY read path.\nI:H - The type-confused pointer is written through by `mutex_lock(&bus->mdio_lock)` in `mdiobus_read()`/`mdiobus_write()` and indirect-called via `bus->read`/`bus->write`, giving a memory-corruption and control-flow-hijack primitive rather than a benign NULL dereference.\nA:H - Dereferencing a `gpio_desc` as a `mii_bus` — taking a mutex at a bogus offset and calling through a non-function-pointer field — reliably produces a kernel oops or panic, taking the switch and the system down." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/dsa/mv88e6xxx/chip.c" ], "versions": [ { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "47d28dde172696031c880c5778633cdca30394ee", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "3bf8d70e1455f87856640c3433b3660a31001618", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "2a2fe25a103cef73cde356e6d09da10f607e93f5", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "8c2c3cca816d074c75a2801d1ca0dea7b0148114", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "aa03f591ef31ba603a4a99d05d25a0f21ab1cd89", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "3f25b5f1635449036692a44b771f39f772190c1d", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "f75625db838ade28f032dacd0f0c8baca42ecde4", "status": "affected", "versionType": "git" }, { "version": "a3c53be55c955b7150cda17874c3fcb4eeb97a89", "lessThan": "4c7f3950a9fd53a62b156c0fe7c3a2c43b0ba19b", "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/dsa/mv88e6xxx/chip.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.318", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.280", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.222", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.163", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.98", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.39", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.9", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "4.11", "versionEndExcluding": "4.19.318" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.4.280" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.10.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.163" }, { 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