CVE-2024-56604

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Exploitation thus requires local execution rather than Bluetooth-range access.\nAC:L - The attacker controls both sides of the condition \u2014 they can drive the system into memory pressure with their own allocations (GFP_ATOMIC allocations fail readily under pressure) while looping on RFCOMM socket creation until the `rfcomm_dlc_alloc()` kzalloc fails. No memory layout or victim state outside the attacker's influence is required.\nPR:L - `bt_sock_create()` performs no capability check for BTPROTO_RFCOMM and even autoloads the rfcomm module on demand, so any unprivileged local user can reach `rfcomm_sock_alloc()` without Bluetooth hardware or CAP_NET_ADMIN/CAP_NET_RAW.\nUI:N - The attacker triggers the entire sequence from their own process via the socket() syscall; no action by any other user is needed.\nS:U - The freed `struct sock` and the stale pointer both live in kernel memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - A freed `struct sock` (rfcomm_pinfo slab object) remains referenced by the socket, and a use-after-free on that object lets an attacker reclaim the slot with controlled data and read back kernel memory, so per UAF scoring guidance confidentiality impact is High.\nI:H - Use-after-free on a `struct sock` gives heap-spray and write primitives over function-pointer-bearing fields (sk_destruct, sk_data_ready, sk_state_change are all set in this very function), which is leverageable for control-flow hijack, so integrity impact is High.\nA:H - Dereferencing the dangling `sk` pointer results in slab corruption and a kernel oops/panic, which is a full denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/rfcomm/sock.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ac3eaac4cf142a15fe67be747a682b1416efeb6e", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6021ccc2471b7b95e29b7cfc7938e042bf56e281", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "32df687e129ef0f9afcbcc914f7c32deb28fd481", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3945c799f12b8d1f49a3b48369ca494d981ac465", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/rfcomm/sock.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "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": "2.6.12", "versionEndExcluding": "6.1.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.66"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ac3eaac4cf142a15fe67be747a682b1416efeb6e"}, {"url": "https://git.kernel.org/stable/c/6021ccc2471b7b95e29b7cfc7938e042bf56e281"}, {"url": "https://git.kernel.org/stable/c/32df687e129ef0f9afcbcc914f7c32deb28fd481"}, {"url": "https://git.kernel.org/stable/c/3945c799f12b8d1f49a3b48369ca494d981ac465"}], "title": "Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-56604", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-11T15:42:12.765631Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-11T15:45:23.368Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:50:48.128Z"}}]}}

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Si rfcomm_dlc_alloc() falla, liberamos el objeto sk, pero dejamos el puntero colgando en el objeto sock, lo que puede provocar un use-after-free. Solucione esto intercambiando las llamadas a bt_sock_alloc() y rfcomm_dlc_alloc()."}], "id": "CVE-2024-56604", "lastModified": "2026-06-17T08:12:31.613", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-56604", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-02-11T15:42:12.765631Z", "version": "2.0.3"}}]}, "published": "2024-12-27T15:15:19.887", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/32df687e129ef0f9afcbcc914f7c32deb28fd481"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3945c799f12b8d1f49a3b48369ca494d981ac465"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6021ccc2471b7b95e29b7cfc7938e042bf56e281"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ac3eaac4cf142a15fe67be747a682b1416efeb6e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"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: Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()", "id": "2334495", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2334495"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()\nbt_sock_alloc() attaches allocated sk object to the provided sock object.\nIf rfcomm_dlc_alloc() fails, we release the sk object, but leave the\ndangling pointer in the sock object, which may cause use-after-free.\nFix this by swapping calls to bt_sock_alloc() and rfcomm_dlc_alloc()."], "name": "CVE-2024-56604", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-56604\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-56604\nhttps://lore.kernel.org/linux-cve-announce/2024122704-CVE-2024-56604-8494@gregkh/T"], "statement": "This issue is considered to be a moderate impact flaw, as the reproduction (and exploit) for this is complex and not available.", "threat_severity": "Moderate"}

{}