{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53160", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.388Z", "datePublished": "2026-06-25T08:38:42.138Z", "dateUpdated": "2026-08-05T12:33:35.015Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:33:35.015Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix use-after-free race in fastrpc_map_create\n\nfastrpc_map_lookup returns a raw pointer after releasing fl->lock. The\ncaller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero)\non this unprotected pointer. A concurrent MEM_UNMAP can free the map\nbetween the lock release and the kref operation, resulting in a\nuse-after-free on the freed slab object.\n\nRestore the take_ref parameter to fastrpc_map_lookup so the reference\nis acquired atomically under fl->lock before the pointer is exposed to\nthe caller." } ], "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 vulnerable code is reached through local FastRPC misc-device ioctls such as FASTRPC_IOCTL_MEM_MAP, FASTRPC_IOCTL_INVOKE, and FASTRPC_IOCTL_INIT_CREATE. There is no network or adjacent-path entry point.\nAC:L - The attacker can drive both sides of the race by issuing concurrent map-creating and MEM_UNMAP ioctls against the same FastRPC file context and DMA-buf fd. No condition outside attacker control is required beyond scheduling the race.\nPR:L - The ioctl path has no in-driver capable(), namespace capability, or credential check once the FastRPC device node is open. Exploitation requires local access to the device node as a basic user or device-authorized app, not real root.\nUI:N - No victim action is required after the attacker has local access. The attacker directly opens the FastRPC device and submits ioctls.\nS:U - This is a kernel memory safety bug in a local kernel driver and exploitation would affect the same kernel security authority. It is not a VM escape, IOMMU bypass, or other cross-scope boundary violation by itself.\nC:H - The bug is a use-after-free on struct fastrpc_map, a slab object containing pointers and DMA mapping state. Under the required high-severity rule, this memory corruption is treated as capable of enabling kernel information disclosure.\nI:H - The use-after-free can be raced with allocator reuse and involves refcount/list/DMA mapping state, making control of freed object contents plausibly exploitable for kernel memory corruption. Under the kernel guidance, UAFs receive high integrity impact.\nA:H - Even without full exploitation, racing kref_get_unless_zero() and later map-field use on a freed object can trigger kernel warnings, oopses, or crashes. Repeated local ioctls can therefore cause high availability impact." } ] } ], "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": "0b70ec82b309a4093106ff399da1911ad23b52d3", "lessThan": "0a3b87293fbd34fda651e6aead9964f84b893962", "status": "affected", "versionType": "git" }, { "version": "d7513b47082c08105e837b06cebeb3f07a5fa56f", "lessThan": "8b080c89183196fd3e49212f2a1a1c4a29335b9c", "status": "affected", "versionType": "git" }, { "version": "802359a52676176b18713e33caa17572ad009057", "lessThan": "5b0166112019d1dce30b976ab28fd67f7f0be532", "status": "affected", "versionType": "git" }, { "version": "10df039834f84a297c72ec962c0f9b7c8c5ca31a", "lessThan": "992f121796b7ca83a5a8b93da24e971363206218", "status": "affected", "versionType": "git" }, { "version": "10df039834f84a297c72ec962c0f9b7c8c5ca31a", "lessThan": "f20f6512ecb75c816e0debf4551a138f098615c4", "status": "affected", "versionType": "git" }, { "version": "10df039834f84a297c72ec962c0f9b7c8c5ca31a", "lessThan": "07ebe87915d8accdaba20c4f88c5ae430fe62fbb", "status": "affected", "versionType": "git" }, { "version": "f3f59bab68e9bc714f757ab22f3fb36153014043", "status": "affected", "versionType": "git" }, { "version": "6.1.156", "lessThan": "6.1.176", "status": "affected", "versionType": "semver" }, { "version": "6.6.112", "lessThan": "6.6.143", "status": "affected", "versionType": "semver" }, { "version": "6.12.53", "lessThan": "6.12.94", "status": "affected", "versionType": "semver" }, { "version": "6.17.3", "lessThan": "6.18", "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": "6.18", "status": "affected" }, { "version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "6.1.156", "versionEndExcluding": "6.1.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.112", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.53", "versionEndExcluding": "6.12.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962" }, { "url": "https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c" }, { "url": "https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532" }, { "url": "https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218" }, { "url": "https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4" }, { "url": "https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb" } ], "title": "misc: fastrpc: fix use-after-free race in fastrpc_map_create", "x_generator": { "engine": "bippy-1.2.0" } } } }