CVE-2022-48873

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Do not remove it on fastrpc_device_release either,\ncall fastrpc_map_put instead.\n\nThe fastrpc_free_map is the only proper place to remove the map.\nThis is called only after the reference count is 0."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached through local ioctl/close on the fastrpc misc device (/dev/fastrpc-*), not via network packet processing. Unprivileged apps on Qualcomm Android can obtain the device fd through the DSP HAL.\nAC:L - An attacker who can open the device fully controls map creation, INIT_CREATE error paths (allocation/invoke failure or timeout), and device_release, so the UAF is reliably triggerable without depending on conditions outside their influence.\nPR:L - The driver is designed for untrusted apps on non-secure fastrpc nodes, and Android apps can obtain the fd via IDspService/DSP HAL without being root. No real root/init-namespace capability is required.\nUI:N - Exploitation needs only the attacker\u2019s own open/ioctl/close sequence; no victim action is required.\nS:U - Impact is kernel memory corruption and local privilege escalation within the same OS security authority, not a VM/IOMMU sandbox escape.\nC:H - Use-after-free of fastrpc_map objects enables heap reuse and arbitrary kernel read primitives per standard UAF exploitation.\nI:H - The same UAF enables heap spraying and arbitrary write/control-flow hijacking in the kernel.\nA:H - Use-after-free of list-linked map objects can cause kernel oops/panic even without full exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "4b5c44e924a571d0ad07054de549624fbc04e4d7", "status": "affected", "versionType": "git"}, {"version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "193cd853145b63e670bd73740250983af1475330", "status": "affected", "versionType": "git"}, {"version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8", "status": "affected", "versionType": "git"}, {"version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "35ddd482345c43d9eec1f3406c0f20a95ed4054b", "status": "affected", "versionType": "git"}, {"version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "5bb96c8f9268e2fdb0e5321cbc358ee5941efc15", "status": "affected", "versionType": "git"}, {"version": "aaf5aa44934ad069cac805923c49f6968b9a0d49", "status": "affected", "versionType": "git"}, {"version": "5.1.6", "lessThan": "5.2", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/misc/fastrpc.c"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.230", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.165", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.90", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.8", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "5.2", "versionEndExcluding": "5.4.230"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.10.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b5c44e924a571d0ad07054de549624fbc04e4d7"}, {"url": "https://git.kernel.org/stable/c/193cd853145b63e670bd73740250983af1475330"}, {"url": "https://git.kernel.org/stable/c/1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8"}, {"url": "https://git.kernel.org/stable/c/35ddd482345c43d9eec1f3406c0f20a95ed4054b"}, {"url": "https://git.kernel.org/stable/c/5bb96c8f9268e2fdb0e5321cbc358ee5941efc15"}], "title": "misc: fastrpc: Don't remove map on creater_process and device_release", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-48873", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:05:22.474051Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:32:53.911Z"}}]}}

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Unprivileged apps on Qualcomm Android can obtain the device fd through the DSP HAL.\nAC:L - An attacker who can open the device fully controls map creation, INIT_CREATE error paths (allocation/invoke failure or timeout), and device_release, so the UAF is reliably triggerable without depending on conditions outside their influence.\nPR:L - The driver is designed for untrusted apps on non-secure fastrpc nodes, and Android apps can obtain the fd via IDspService/DSP HAL without being root. No real root/init-namespace capability is required.\nUI:N - Exploitation needs only the attacker\u2019s own open/ioctl/close sequence; no victim action is required.\nS:U - Impact is kernel memory corruption and local privilege escalation within the same OS security authority, not a VM/IOMMU sandbox escape.\nC:H - Use-after-free of fastrpc_map objects enables heap reuse and arbitrary kernel read primitives per standard UAF exploitation.\nI:H - The same UAF enables heap spraying and arbitrary write/control-flow hijacking in the kernel.\nA:H - Use-after-free of list-linked map objects can cause kernel oops/panic even without full exploitation."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "4b5c44e924a571d0ad07054de549624fbc04e4d7", "versionType": "git"}, {"status": "affected", "version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "193cd853145b63e670bd73740250983af1475330", "versionType": "git"}, {"status": "affected", "version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8", "versionType": "git"}, {"status": "affected", "version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "35ddd482345c43d9eec1f3406c0f20a95ed4054b", "versionType": "git"}, {"status": "affected", "version": "b49f6d83e290f17e20f4e5cf31288d3bb4955ea6", "lessThan": "5bb96c8f9268e2fdb0e5321cbc358ee5941efc15", "versionType": "git"}, {"status": "affected", "version": "aaf5aa44934ad069cac805923c49f6968b9a0d49", "versionType": "git"}, {"status": "affected", "version": "5.1.6", "lessThan": "5.2", "versionType": "semver"}], "programFiles": ["drivers/misc/fastrpc.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"status": "unaffected", "version": "0", "lessThan": "5.2", "versionType": "semver"}, {"status": "unaffected", "version": "5.4.230", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.165", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.90", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.8", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/misc/fastrpc.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/4b5c44e924a571d0ad07054de549624fbc04e4d7"}, {"url": "https://git.kernel.org/stable/c/193cd853145b63e670bd73740250983af1475330"}, {"url": "https://git.kernel.org/stable/c/1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8"}, {"url": "https://git.kernel.org/stable/c/35ddd482345c43d9eec1f3406c0f20a95ed4054b"}, {"url": "https://git.kernel.org/stable/c/5bb96c8f9268e2fdb0e5321cbc358ee5941efc15"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Don't remove map on creater_process and device_release\n\nDo not remove the map from the list on error path in\nfastrpc_init_create_process, instead call fastrpc_map_put, to avoid\nuse-after-free. Do not remove it on fastrpc_device_release either,\ncall fastrpc_map_put instead.\n\nThe fastrpc_free_map is the only proper place to remove the map.\nThis is called only after the reference count is 0."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.230", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.165", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.90", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.8", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.1.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:44.074Z"}}}, "cveMetadata": {"cveId": "CVE-2022-48873", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:52:44.074Z", "dateReserved": "2024-07-16T11:38:08.921Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-21T06:10:04.024Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Do not remove it on fastrpc_device_release either,\ncall fastrpc_map_put instead.\n\nThe fastrpc_free_map is the only proper place to remove the map.\nThis is called only after the reference count is 0."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: misc: fastrpc: no elimine el mapa en creater_process y device_release. No elimine el mapa de la lista en la ruta de error en fastrpc_init_create_process; en su lugar, llame a fastrpc_map_put para evitar el use-after-free. Tampoco lo elimine en fastrpc_device_release; en su lugar, llame a fastrpc_map_put. fastrpc_free_map es el \u00fanico lugar adecuado para eliminar el mapa. Esto se llama solo despu\u00e9s de que el recuento de referencias sea 0."}], "id": "CVE-2022-48873", "lastModified": "2026-08-04T10:17:24.933", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-48873", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:05:22.474051Z", "version": "2.0.3"}}]}, "published": "2024-08-21T07:15:04.323", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/193cd853145b63e670bd73740250983af1475330"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1b7b7bb400dd13dcb03fc6e591bb7ca4664bbec8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/35ddd482345c43d9eec1f3406c0f20a95ed4054b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4b5c44e924a571d0ad07054de549624fbc04e4d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5bb96c8f9268e2fdb0e5321cbc358ee5941efc15"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: misc: fastrpc: Don't remove map on creater_process and device_release", "id": "2306394", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2306394"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmisc: fastrpc: Don't remove map on creater_process and device_release\nDo not remove the map from the list on error path in\nfastrpc_init_create_process, instead call fastrpc_map_put, to avoid\nuse-after-free. Do not remove it on fastrpc_device_release either,\ncall fastrpc_map_put instead.\nThe fastrpc_free_map is the only proper place to remove the map.\nThis is called only after the reference count is 0."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2022-48873", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48873\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48873\nhttps://lore.kernel.org/linux-cve-announce/2024082106-CVE-2022-48873-dc18@gregkh/T"], "statement": "Red Hat Enterprise Linux is not impacted by this CVE, as the vulnerability in question does not affect the specific versions or configurations of the Linux kernel used in its distributions. This ensures that users of Red Hat Enterprise Linux are not exposed to the potential risks associated with this issue, and no further action or mitigation is necessary for systems running this operating system.", "threat_severity": "Important"}

{}