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        "cveId": "CVE-2022-48874",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-07-16T11:38:08.921Z",
        "datePublished": "2024-08-21T06:10:05.081Z",
        "dateUpdated": "2026-08-05T08:52:45.133Z"
    },
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                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: Fix use-after-free and race in fastrpc_map_find\n\nCurrently, there is a race window between the point when the mutex is\nunlocked in fastrpc_map_lookup and the reference count increasing\n(fastrpc_map_get) in fastrpc_map_find, which can also lead to\nuse-after-free.\n\nSo lets merge fastrpc_map_find into fastrpc_map_lookup which allows us\nto both protect the maps list by also taking the &fl->lock spinlock and\nthe reference count, since the spinlock will be released only after.\nAdd take_ref argument to make this suitable for all callers."
                }
            ],
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                        "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 vulnerability is reached only through local ioctls on /dev/fastrpc-* misc devices (FASTRPC_IOCTL_INVOKE / MEM_MAP / MEM_UNMAP) via fastrpc_device_ioctl → fastrpc_map_create → fastrpc_map_find; it is not reachable from network packet processing.\nAC:L - The attacker controls both sides of the race by issuing concurrent ioctls from multiple threads on the same fastrpc fd (e.g. map_find via invoke/mem_map while another thread drops the last map ref via mem_unmap or put_args), so success does not depend on conditions outside attacker control.\nPR:L - fastrpc_device_open performs no capability check, and on typical Qualcomm/Android deployments unprivileged/untrusted contexts can obtain access to the non-secure fastrpc node (directly or via HAL FD passing), so real root/init-namespace privileges are not required.\nUI:N - Exploitation requires only the attacker’s own open/ioctl calls on the fastrpc device; no separate victim action is needed.\nS:U - This is a kernel heap UAF enabling privilege escalation within the same OS security authority; it does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - Use-after-free of struct fastrpc_map lets an attacker reclaim and control the freed object, enabling arbitrary kernel memory disclosure.\nI:H - The same UAF is exploitable for heap spraying and arbitrary write / control-flow hijacking in the kernel, not merely a limited corruption.\nA:H - Use-after-free of the map object can cause kernel oops/panic (and does so even when not fully exploited for code execution)."
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                        },
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                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
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                }
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                                    "vulnerable": true,
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                                    "versionEndExcluding": "6.1.8"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a50c5c25b6e7d2824698c0e6385f882a18f4a498"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9446fa1683a7e3937d9970248ced427c1983a1c5"
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            "title": "misc: fastrpc: Fix use-after-free and race in fastrpc_map_find",
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