CVE-2026-46105

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However, because the driver allocates a fixed 4K buffer for\nthe PRP list, accommodating at most 512 entries, the driver supports a\nmaximum I/O transfer size of 2 MiB.\n\nLimit max_hw_sectors to the smaller of the reported MDTS and the 2 MiB\ndriver limit to prevent issuing oversized I/O that may lead to a kernel\noops."}], "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 a SCSI/NVMe storage HBA driver with no network exposure; the overflow is reached by issuing block I/O to an NVMe device behind the controller, requiring local access to the affected system.\nAC:L - On an affected configuration (an NVMe drive reporting MDTS > 2 MiB behind the HBA), the uncapped max_hw_sectors lets a single >2 MiB I/O reach the driver, so the attacker reliably overflows the fixed 512-entry PRP buffer with no race or uncontrolled condition.\nPR:L - An ordinary unprivileged local user with read/write access to a file or block device on the NVMe drive can issue a large O_DIRECT request that the block layer submits as one oversized I/O; no root or special capability is needed.\nUI:N - The attacker triggers the overflow directly by submitting their own large I/O; no action by another user is required.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no VM/IOMMU/sandbox boundary crossing.\nC:H - The out-of-bounds write corrupts the contiguous DMA pool holding PRP descriptors for other in-flight commands, and such memory corruption of DMA address lists can be leveraged to misdirect DMA and disclose memory contents.\nI:H - This is an out-of-bounds/heap write past the fixed PRP DMA buffer, corrupting adjacent kernel DMA-pool memory with attacker-influenced (page-address) data \u2014 classic memory-corruption integrity impact.\nA:H - Overrunning the fixed PRP buffer corrupts kernel memory and leads to a kernel oops/panic, as documented in the fix (\"may lead to a kernel oops\")."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/mpt3sas/mpt3sas_scsih.c"], "versions": [{"version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b", "lessThan": "45dcc815fc5539e88154315f36cbcb11d3a52fc2", "status": "affected", "versionType": "git"}, {"version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b", "lessThan": "e5f9824817c6358b9f9738bdb92dec9e4e794d3c", "status": "affected", "versionType": "git"}, {"version": "9b8b84879d4adc506b0d3944e20b28d9f3f6994b", "lessThan": "04631f55afc543d5431a2bdee7f6cc0f2c0debe7", "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/scsi/mpt3sas/mpt3sas_scsih.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "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": "6.17", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/45dcc815fc5539e88154315f36cbcb11d3a52fc2"}, {"url": "https://git.kernel.org/stable/c/e5f9824817c6358b9f9738bdb92dec9e4e794d3c"}, {"url": "https://git.kernel.org/stable/c/04631f55afc543d5431a2bdee7f6cc0f2c0debe7"}], "title": "scsi: mpt3sas: Limit NVMe request size to 2 MiB", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{"bugzilla": {"description": "kernel: scsi: mpt3sas: Limit NVMe request size to 2 MiB", "id": "2482611", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482611"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-131", "details": ["A flaw was found in the `mpt3sas` driver within the Linux kernel. This vulnerability allows for oversized Non-Volatile Memory Express (NVMe) input/output (I/O) operations due to improper size limitations. An attacker or a malicious NVMe device could exploit this by issuing I/O requests that exceed the driver's supported maximum. The primary consequence is a kernel oops, which can lead to a system crash."], "name": "CVE-2026-46105", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46105\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46105\nhttps://lore.kernel.org/linux-cve-announce/2026052811-CVE-2026-46105-965c@gregkh/T"], "threat_severity": "Moderate"}

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