{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50623", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T01:14:55.190Z", "datePublished": "2025-12-08T01:16:37.086Z", "dateUpdated": "2026-08-05T08:59:12.762Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:12.762Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: prevent integer overflow in dfl_feature_ioctl_set_irq()\n\nThe \"hdr.count * sizeof(s32)\" multiplication can overflow on 32 bit\nsystems leading to memory corruption. Use array_size() to fix that." } ], "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 vulnerability is reached via ioctl on local DFL character devices (/dev/dfl-port.* or /dev/dfl-fme.*) through afu_ioctl/fme_ioctl into dfl_feature_ioctl_set_irq(); it is not reachable from network packet processing or physical bus injection.\nAC:L - An attacker who can open the device fully controls hdr.start/hdr.count and the eventfd array and can issue the SET_IRQ ioctl directly; triggering the overflow path does not depend on a race or other conditions outside the attacker’s influence.\nPR:L - Neither open nor the SET_IRQ ioctl path checks capabilities—only device-node permissions—and DFL ports/AFUs are explicitly intended for userspace applications, including SR-IOV VF tenants and deployments that grant group access via udev, so real root is not required.\nUI:N - The attacker opens the DFL device and issues DFL_FPGA_*_SET_IRQ themselves; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:U - Impact is memory corruption within the host (or guest, under VF passthrough) kernel’s DFL driver privilege boundary; this is ordinary local kernel compromise, not a VM escape or IOMMU/cross-authority bypass.\nC:H - The integer overflow causes memdup_user() to allocate an undersized buffer while the code still iterates hdr.count entries, producing an out-of-bounds kernel heap read of the fds array that can be leveraged for information disclosure under memory-corruption guidance.\nI:H - The commit documents memory corruption from the wrapped allocation size; an undersized heap object consumed as a large fd array is exploitable for integrity compromise and control-flow impact consistent with kernel scoring of similar memdup_user overflows.\nA:H - Out-of-bounds access of the undersized fds buffer can oops/panic the kernel (including KASAN or unmapped heap pages), 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/fpga/dfl.c" ], "versions": [ { "version": "322b598be4d9b9090cda560c4caab78704615ab4", "lessThan": "f59861946fa51bcc1f305809e4ebc1013b0ee61c", "status": "affected", "versionType": "git" }, { "version": "322b598be4d9b9090cda560c4caab78704615ab4", "lessThan": "b94605f5cb99e90c8ca91523597a40e1bd59546b", "status": "affected", "versionType": "git" }, { "version": "322b598be4d9b9090cda560c4caab78704615ab4", "lessThan": "1b5a931594f7ffd26d706614c37d4da0f2ffb6e7", "status": "affected", "versionType": "git" }, { "version": "322b598be4d9b9090cda560c4caab78704615ab4", "lessThan": "940253af8b3865b76de8d1b46bcd4a700104852e", "status": "affected", "versionType": "git" }, { "version": "322b598be4d9b9090cda560c4caab78704615ab4", "lessThan": "939bc5453b8cbdde9f1e5110ce8309aedb1b501a", "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/fpga/dfl.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "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": "5.9", "versionEndExcluding": "5.10.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f59861946fa51bcc1f305809e4ebc1013b0ee61c" }, { "url": "https://git.kernel.org/stable/c/b94605f5cb99e90c8ca91523597a40e1bd59546b" }, { "url": "https://git.kernel.org/stable/c/1b5a931594f7ffd26d706614c37d4da0f2ffb6e7" }, { "url": "https://git.kernel.org/stable/c/940253af8b3865b76de8d1b46bcd4a700104852e" }, { "url": "https://git.kernel.org/stable/c/939bc5453b8cbdde9f1e5110ce8309aedb1b501a" } ], "title": "fpga: prevent integer overflow in dfl_feature_ioctl_set_irq()", "x_generator": { "engine": "bippy-1.2.0" } } } }