{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-23244",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-23244"
  ],
  "published": "2026-03-18T10:05:24Z",
  "summary": "nvme: fix memory allocation in nvme_pr_read_keys()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix memory allocation in nvme_pr_read_keys()\n\nnvme_pr_read_keys() takes num_keys from userspace and uses it to\ncalculate the allocation size for rse via struct_size(). The upper\nlimit is PR_KEYS_MAX (64K).\n\nA malicious or buggy userspace can pass a large num_keys value that\nresults in a 4MB allocation attempt at most, causing a warning in\nthe page allocator when the order exceeds MAX_PAGE_ORDER.\n\nTo fix this, use kvzalloc() instead of kzalloc().\n\nThis bug has the same reasoning and fix with the patch below:\nhttps://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/\n\nWarning log:\nWARNING: mm/page_alloc.c:5216 at __alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216, CPU#1: syz-executor117/272\nModules linked in:\nCPU: 1 UID: 0 PID: 272 Comm: syz-executor117 Not tainted 6.19.0 #1 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\nRIP: 0010:__alloc_frozen_pages_noprof+0x5aa/0x2300 mm/page_alloc.c:5216\nCode: ff 83 bd a8 fe ff ff 0a 0f 86 69 fb ff ff 0f b6 1d f9 f9 c4 04 80 fb 01 0f 87 3b 76 30 ff 83 e3 01 75 09 c6 05 e4 f9 c4 04 01 <0f> 0b 48 c7 85 70 fe ff ff 00 00 00 00 e9 8f fd ff ff 31 c0 e9 0d\nRSP: 0018:ffffc90000fcf450 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff920001f9ea0\nRDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000040dc0\nRBP: ffffc90000fcf648 R08: ffff88800b6c3380 R09: 0000000000000001\nR10: ffffc90000fcf840 R11: ffff88807ffad280 R12: 0000000000000000\nR13: 0000000000040dc0 R14: 0000000000000001 R15: ffffc90000fcf620\nFS:  0000555565db33c0(0000) GS:ffff8880be26c000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000002000000c CR3: 0000000003b72000 CR4: 00000000000006f0\nCall Trace:\n <TASK>\n alloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\n alloc_frozen_pages_noprof+0x149/0x180 mm/mempolicy.c:2557\n ___kmalloc_large_node+0x10c/0x140 mm/slub.c:5598\n __kmalloc_large_node_noprof+0x25/0xc0 mm/slub.c:5629\n __do_kmalloc_node mm/slub.c:5645 [inline]\n __kmalloc_noprof+0x483/0x6f0 mm/slub.c:5669\n kmalloc_noprof include/linux/slab.h:961 [inline]\n kzalloc_noprof include/linux/slab.h:1094 [inline]\n nvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\n blkdev_pr_read_keys block/ioctl.c:456 [inline]\n blkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\n blkdev_ioctl+0x299/0x700 block/ioctl.c:786\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x1bf/0x220 fs/ioctl.c:583\n x64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7fb893d3108d\nCode: 28 c3 e8 46 1e 00 00 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffff61f2f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 00007ffff61f3138 RCX: 00007fb893d3108d\nRDX: 0000000020000040 RSI: 00000000c01070ce RDI: 0000000000000003\nRBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffff61f3138\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001\nR13: 00007ffff61f3128 R14: 00007fb893dae530 R15: 0000000000000001\n </TASK>",
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