{
  "threat_severity" : "Low",
  "public_date" : "2026-03-18T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: nvme: fix memory allocation in nvme_pr_read_keys()",
    "id" : "2448601",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2448601"
  },
  "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"
  },
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnvme: fix memory allocation in nvme_pr_read_keys()\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).\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.\nTo fix this, use kvzalloc() instead of kzalloc().\nThis bug has the same reasoning and fix with the patch below:\nhttps://lore.kernel.org/linux-block/20251212013510.3576091-1-kartikey406@gmail.com/\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>\nalloc_pages_mpol+0x236/0x4d0 mm/mempolicy.c:2486\nalloc_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\nkmalloc_noprof include/linux/slab.h:961 [inline]\nkzalloc_noprof include/linux/slab.h:1094 [inline]\nnvme_pr_read_keys+0x8f/0x4c0 drivers/nvme/host/pr.c:245\nblkdev_pr_read_keys block/ioctl.c:456 [inline]\nblkdev_common_ioctl+0x1b71/0x29b0 block/ioctl.c:730\nblkdev_ioctl+0x299/0x700 block/ioctl.c:786\nvfs_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\nx64_sys_call+0x1280/0x21b0 mnt/fuzznvme_1/fuzznvme/linux-build/v6.19/./arch/x86/include/generated/asm/syscalls_64.h:17\ndo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\ndo_syscall_64+0x71/0x330 arch/x86/entry/syscall_64.c:94\nentry_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>" ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-23244\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23244\nhttps://lore.kernel.org/linux-cve-announce/2026031817-CVE-2026-23244-9738@gregkh/T" ],
  "name" : "CVE-2026-23244",
  "csaw" : false
}