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ioctls (MEMREAD, MEMWRITE, MEMERASE, MEMSETBADBLOCK) and mtdblock I/O, not via network protocols or physical hotplug alone.\nAC:L - An attacker with MTD device access can repeatedly issue read, write, or erase operations on multi-die NAND hardware; when a caller supplies cs equal to nanddev_ntargets(), the defective check passes deterministically and invokes the controller select_chip path.\nPR:L - Exploitation requires local write access to the MTD character device (FMODE_WRITE on /dev/mtdX) but no capability() gate beyond device permissions; per kernel CNA guidance, PR:L is chosen when uncertain between device-permission low and root-only high privilege.\nUI:N - No separate victim interaction is required; once the attacker has access to the MTD device node they can trigger the vulnerable nand_select_target() path through their own ioctl or read/write requests.\nS:U - Impact remains within the kernel and on-board NAND controller security authority on the host; it does not cross VM, container, IOMMU, or other security-boundary scopes into a separate authority.\nC:H - When cs equals nanddev_ntargets() the invalid index reaches controller select_chip handlers (denali, mtk, rockchip, renesas) that index sels[cs] without bounds checking, enabling out-of-bounds kernel memory reads.\nI:H - Out-of-bounds sels[cs] values are written into NAND controller CE-select and timing registers, plausibly corrupting flash contents or protection state; under the required uncertainty rule this memory-safety defect is scored as high integrity impact.\nA:H - On legacy/default select_chip paths an out-of-range cs hits BUG(), and controller misconfiguration from invalid CE selection can oops or hang the kernel, satisfying high availability impact for kernel crash classes."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/nand/raw/nand_base.c"], 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{"bugzilla": {"description": "kernel: mtd: rawnand: fix condition in 'nand_select_target()'", "id": "2516607", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516607"}, "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-1285", "details": ["A flaw was found in the mtd: rawnand component of the Linux kernel. The nand_select_target() function contains an incorrect condition check for the 'cs' (chip select) parameter, allowing it to go out of its intended range. This out-of-bounds access could potentially lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-72165", "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": "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72165\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72165\nhttps://lore.kernel.org/linux-cve-announce/2026081537-CVE-2026-72165-a73d@gregkh/T"], "threat_severity": "Low"}

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