CVE-2022-50756

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In that scenario, the driver would corrupt memory beyond the\nsize provided by the mempool.\n\nWhile unlikely to occur (you'd need a 4MB in exactly 127 phys segments\non a queue that doesn't support SGLs), this memory corruption has been\nobserved by kfence."}], "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 in the nvme-pci host driver and is reached only through local block I/O submission to an NVMe namespace, not by parsing network packets or remote NVMe fabrics protocols.\nAC:L - An attacker can reliably craft large O_DIRECT I/Os with a fragmented user buffer to produce ~2\u20134MB requests with a high phys-segment count, forcing the PRP path and the undersized mempool overflow without depending on a race or other uncontrolled state.\nPR:L - Any unprivileged local user who can write to a file on an NVMe-backed filesystem can submit the triggering I/O; raw block-device privileges or root capabilities are not required.\nUI:N - Exploitation requires only attacker-controlled I/O; no separate victim action such as mounting a volume or opening a malicious file is needed.\nS:U - This is a host-kernel heap corruption in the NVMe driver that can escalate privileges within the same OS security authority; it does not cross a VM, IOMMU, or other security boundary by itself.\nC:H - The bug is a heap out-of-bounds write of PRP list pointers past the iod mempool object, which is memory corruption that can be leveraged for arbitrary kernel read primitives under standard heap-exploitation techniques.\nI:H - Out-of-bounds writes into adjacent slab memory enable corruption of kernel objects and control-flow hijacking primitives, so integrity impact is high per OOB-write guidance.\nA:H - The same overflow can crash the kernel (observed under KFENCE) via slab corruption or guard-page faults, producing a full availability loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/host/pci.c"], "versions": [{"version": "943e942e6266f22babee5efeb00f8f672fbff5bd", "lessThan": "dfb6d54893d544151e7f480bc44cfe7823f5ad23", "status": "affected", "versionType": "git"}, {"version": "943e942e6266f22babee5efeb00f8f672fbff5bd", "lessThan": "9141144b37f30e3e7fa024bcfa0a13011e546ba9", "status": "affected", "versionType": "git"}, {"version": "943e942e6266f22babee5efeb00f8f672fbff5bd", "lessThan": "e1777b4286e526c58b4ee699344b0ad85aaf83a0", "status": "affected", "versionType": "git"}, {"version": "943e942e6266f22babee5efeb00f8f672fbff5bd", "lessThan": "b1814724e0d7162bdf4799f2d565381bc2251c63", "status": "affected", "versionType": "git"}, {"version": "943e942e6266f22babee5efeb00f8f672fbff5bd", "lessThan": "c89a529e823d51dd23c7ec0c047c7a454a428541", "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/nvme/host/pci.c"], "versions": [{"version": "4.18", "status": "affected"}, {"version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.163", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.87", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.17", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.3", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "4.18", "versionEndExcluding": "5.10.163"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.87"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.0.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23"}, {"url": "https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9"}, {"url": "https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0"}, {"url": "https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63"}, {"url": "https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541"}], "title": "nvme-pci: fix mempool alloc size", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50756", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:32:29.362408Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:23.908Z"}}]}}

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{"bugzilla": {"description": "kernel: nvme-pci: fix mempool alloc size", "id": "2425209", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2425209"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50756", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50756\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50756\nhttps://lore.kernel.org/linux-cve-announce/2025122453-CVE-2022-50756-ce43@gregkh/T"], "threat_severity": "Moderate"}

{}