{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50570", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-22T13:20:23.760Z", "datePublished": "2025-10-22T13:23:26.495Z", "dateUpdated": "2026-08-05T08:59:10.542Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:10.542Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/chrome: fix memory corruption in ioctl\n\nIf \"s_mem.bytes\" is larger than the buffer size it leads to memory\ncorruption." } ], "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 only through a local ioctl (CROS_EC_DEV_IOCRDMEM) on the Cros EC misc character device (/dev/cros_ec) via cros_ec_chardev_ioctl → cros_ec_chardev_ioctl_readmem; it is not reachable from network packet processing or physical bus injection.\nAC:L - An attacker who can open the device fully controls s_mem.bytes/offset and can set bytes > EC_MEMMAP_SIZE (255); unsigned underflow in cros_ec_lpc_readmem’s bounds check then lets cmd_readmem write past the stack buffer with no race or other condition outside the attacker’s control.\nPR:L - Neither open nor the readmem ioctl path checks capabilities—only device-node permissions—and /dev/cros_ec is intended for userspace EC tools, with Chrome OS cros_ec-access group access and Linux deployments that grant udev/uaccess, so real root is not required.\nUI:N - The attacker opens /dev/cros_ec and issues CROS_EC_DEV_IOCRDMEM themselves; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:U - Impact is kernel stack memory corruption within the host OS privilege boundary via the platform chrome chardev driver; this is ordinary local kernel compromise, not a VM escape or IOMMU/cross-authority bypass.\nC:H - The out-of-bounds stack write is memory corruption that, per kernel CVSS guidance, can be leveraged for information disclosure and full compromise once control-flow is hijacked.\nI:H - cmd_readmem writes an attacker-chosen number of bytes into the fixed-size s_mem.buffer on the kernel stack (cros_ec_lpc_read_bytes loops length times into dest), producing an out-of-bounds write exploitable for integrity compromise and control-flow hijacking.\nA:H - Stack buffer overflow past s_mem.buffer can oops/panic the kernel (stack canary, corrupted frames, or large I/O reads into kernel stack), which is high availability impact under kernel CVSS guidance." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/platform/chrome/cros_ec_chardev.c" ], "versions": [ { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "e548f9503c4b3292a60a63fe77dccea62999a35a", "status": "affected", "versionType": "git" }, { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "868fc93b615b9f6c2b0b1894536618fa6cd66acc", "status": "affected", "versionType": "git" }, { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "fd1d3b265784a2243fcaef06aebfb2f8ee733cec", "status": "affected", "versionType": "git" }, { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "f143f1d9a8e5c6c9db3de81ca270191226fcce36", "status": "affected", "versionType": "git" }, { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "0c2e18924504208644d18415667895a4ac54cf2a", "status": "affected", "versionType": "git" }, { "version": "eda2e30c6684d67288edb841c6125d48c608a242", "lessThan": "8a07b45fd3c2dda24fad43639be5335a4595196a", "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/platform/chrome/cros_ec_chardev.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "5.4", "versionEndExcluding": "5.4.220" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e548f9503c4b3292a60a63fe77dccea62999a35a" }, { "url": "https://git.kernel.org/stable/c/868fc93b615b9f6c2b0b1894536618fa6cd66acc" }, { "url": "https://git.kernel.org/stable/c/fd1d3b265784a2243fcaef06aebfb2f8ee733cec" }, { "url": "https://git.kernel.org/stable/c/f143f1d9a8e5c6c9db3de81ca270191226fcce36" }, { "url": "https://git.kernel.org/stable/c/0c2e18924504208644d18415667895a4ac54cf2a" }, { "url": "https://git.kernel.org/stable/c/8a07b45fd3c2dda24fad43639be5335a4595196a" } ], "title": "platform/chrome: fix memory corruption in ioctl", "x_generator": { "engine": "bippy-1.2.0" } } } }