CVE-2024-50055

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No remote peer, network packet, or physical device is involved.\nAC:L - The attacker can drive the system into memory pressure and then repeatedly force `scsi_transport_iscsi` autoload, because a failed module init leaves the netlink protocol unregistered so the request_module can be replayed without limit until an allocation inside `bus_register()` fails. Nothing about the trigger depends on state outside the attacker's influence, and the two `kfree()` calls then execute back-to-back deterministically.\nPR:L - `netlink_create()` performs `request_module(\"net-pf-16-proto-8\")` with no capability check at all, so an ordinary unprivileged user reaches `iscsi_transport_init()` \u2192 `bus_register(&iscsi_flashnode_bus)` with a single socket() call. No CAP_SYS_MODULE, no root, and no user-namespace trickery is needed for this path.\nUI:N - The attacker performs every step itself \u2014 create memory pressure, issue the socket() call that triggers autoload \u2014 with no victim action, mount, file open, or administrator involvement required.\nS:U - The corrupted object is a kernel slab allocation and the consequences stay entirely within the kernel's own security authority; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The double free makes the SLUB freelist self-referential so two later allocations of the same size class alias one address, giving type confusion between attacker-controlled and kernel objects and thus an arbitrary kernel-memory read primitive. Freed-object contents can be reclaimed and disclosed through the aliased structure.\nI:H - The same freelist aliasing lets an attacker-sprayed object overwrite the fields of an unrelated live kernel structure \u2014 including function pointers reachable from `struct subsys_private`-sized kmalloc objects \u2014 yielding an arbitrary write and control-flow hijack primitive, i.e. full local privilege escalation.\nA:H - Even without successful exploitation the double free corrupts the slab allocator and panics the machine; on kernels built with CONFIG_SLAB_FREELIST_HARDENED the `BUG_ON(object == fp)` in `set_freepointer()` fires immediately, and `bus_release()` additionally calls `lockdep_unregister_key()` on a never-registered key on the early error paths."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/bus.c"], "versions": [{"version": "3465e2e4a24eef9bc9f21aa29d83fd7000c1da48", "lessThan": "d885c464c25018b81a6b58f5d548fc2e3ef87dd1", "status": "affected", "versionType": "git"}, {"version": "3465e2e4a24eef9bc9f21aa29d83fd7000c1da48", "lessThan": "9ce15f68abedfae7ae0a35e95895aeddfd0f0c6a", "status": "affected", "versionType": "git"}, {"version": "3465e2e4a24eef9bc9f21aa29d83fd7000c1da48", "lessThan": "bfa54a793ba77ef696755b66f3ac4ed00c7d1248", "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/base/bus.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.57", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "6.3", "versionEndExcluding": "6.6.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.11.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d885c464c25018b81a6b58f5d548fc2e3ef87dd1"}, {"url": "https://git.kernel.org/stable/c/9ce15f68abedfae7ae0a35e95895aeddfd0f0c6a"}, {"url": "https://git.kernel.org/stable/c/bfa54a793ba77ef696755b66f3ac4ed00c7d1248"}], "title": "driver core: bus: Fix double free in driver API bus_register()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-50055", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:23:36.877414Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:28:43.087Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:43:22.001Z"}}]}}

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bus: Fix double free in driver API bus_register()\n\nFor bus_register(), any error which happens after kset_register() will\ncause that @priv are freed twice, fixed by setting @priv with NULL after\nthe first free."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: n\u00facleo del controlador: bus: se corrige la doble liberaci\u00f3n en la API del controlador bus_register() Para bus_register(), cualquier error que ocurra despu\u00e9s de kset_register() provocar\u00e1 que @priv se libere dos veces, lo que se soluciona configurando @priv con NULL despu\u00e9s de la primera liberaci\u00f3n."}], "id": "CVE-2024-50055", "lastModified": "2026-08-04T11:21:12.887", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", 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{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: driver core: bus: Fix double free in driver API bus_register()", "id": "2320615", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320615"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-415", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndriver core: bus: Fix double free in driver API bus_register()\nFor bus_register(), any error which happens after kset_register() will\ncause that @priv are freed twice, fixed by setting @priv with NULL after\nthe first free."], "name": "CVE-2024-50055", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50055\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50055\nhttps://lore.kernel.org/linux-cve-announce/2024102134-CVE-2024-50055-7d1f@gregkh/T"], "statement": "This issue is considered to be a moderate impact flaw, as the exploitation for this will need an ADMIN (or ROOT) privilege (PR:H).", "threat_severity": "Moderate"}

{}