{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49952", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.382Z", "datePublished": "2025-06-18T11:00:15.434Z", "dateUpdated": "2026-08-05T08:56:52.538Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:56:52.538Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix memory corruption on probe\n\nAdd the missing sanity check on the probed-session count to avoid\ncorrupting memory beyond the fixed-size slab-allocated session array\nwhen there are more than FASTRPC_MAX_SESSIONS sessions defined in the\ndevicetree." } ], "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 in the Qualcomm FastRPC platform compute-cb probe path during local DSP/rpmsg bring-up, not reachable via network packets or adjacent-link protocols.\nAC:L - On realistic Qualcomm device trees such as SC8280XP with 14 CDSP context banks (when FASTRPC_MAX_SESSIONS was 13) or oversized qcom,nsessions, probe reliably performs the out-of-bounds session array write with no attacker-uncontrollable race.\nPR:L - fastrpc_cb_probe runs from trusted DT during device bring-up without a capability gate; on primary Android/Qualcomm deployments the resulting kernel corruption is then reachable by low-privilege local processes using the fastrpc device nodes.\nUI:N - Exploitation requires no victim action; the overflow is triggered automatically when the compute-cb devices are probed.\nS:U - Impact is confined to kernel memory in the same host OS security authority (local privilege escalation), with no VM or IOMMU boundary crossed.\nC:H - The out-of-bounds write past the fixed session array corrupts adjacent channel_ctx fields (including idr and list pointers), which can be leveraged for arbitrary kernel memory disclosure.\nI:H - Out-of-bounds write into the spinlock, idr, and users list immediately following the session array enables classic kernel heap/list corruption primitives for arbitrary write and control-flow hijacking.\nA:H - Corrupting the channel spinlock, idr, or list_head reliably causes kernel oops, panic, or hangs when those structures are subsequently used." } ] } ], "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": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "ec186b9f4aa2e6444d5308a6cc268aada7007639", "status": "affected", "versionType": "git" }, { "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "c99bc901d5eb9fbdd7bd39f625e170ce97390336", "status": "affected", "versionType": "git" }, { "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "0e33b0f322fecd7a92d9dc186535cdf97940a856", "status": "affected", "versionType": "git" }, { "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "c0425c2facd9166fa083f90c9f3187ace0c7837a", "status": "affected", "versionType": "git" }, { "version": "f6f9279f2bf0e37e2f1fb119d8832b8568536a04", "lessThan": "9baa1415d9abdd1e08362ea2dcfadfacee8690b5", "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/misc/fastrpc.c" ], "versions": [ { "version": "5.1", "status": "affected" }, { "version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.213", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.142", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.66", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.8", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "5.1", "versionEndExcluding": "5.4.213" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.10.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.15.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.19.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ec186b9f4aa2e6444d5308a6cc268aada7007639" }, { "url": "https://git.kernel.org/stable/c/c99bc901d5eb9fbdd7bd39f625e170ce97390336" }, { "url": "https://git.kernel.org/stable/c/0e33b0f322fecd7a92d9dc186535cdf97940a856" }, { "url": "https://git.kernel.org/stable/c/c0425c2facd9166fa083f90c9f3187ace0c7837a" }, { "url": "https://git.kernel.org/stable/c/9baa1415d9abdd1e08362ea2dcfadfacee8690b5" } ], "title": "misc: fastrpc: fix memory corruption on probe", "x_generator": { "engine": "bippy-1.2.0" } } } }