{
  "threat_severity" : "Moderate",
  "public_date" : "2025-06-18T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: of: check previous kernel's ima-kexec-buffer against memory bounds",
    "id" : "2373696",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2373696"
  },
  "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" : "verified"
  },
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nof: check previous kernel's ima-kexec-buffer against memory bounds\nPresently ima_get_kexec_buffer() doesn't check if the previous kernel's\nima-kexec-buffer lies outside the addressable memory range. This can result\nin a kernel panic if the new kernel is booted with 'mem=X' arg and the\nima-kexec-buffer was allocated beyond that range by the previous kernel.\nThe panic is usually of the form below:\n$ sudo kexec --initrd initrd vmlinux --append='mem=16G'\n<snip>\nBUG: Unable to handle kernel data access on read at 0xc000c01fff7f0000\nFaulting instruction address: 0xc000000000837974\nOops: Kernel access of bad area, sig: 11 [#1]\n<snip>\nNIP [c000000000837974] ima_restore_measurement_list+0x94/0x6c0\nLR [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160\nCall Trace:\n[c00000000371fa80] [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160\n[c00000000371fb00] [c0000000020512c4] ima_init+0x80/0x108\n[c00000000371fb70] [c0000000020514dc] init_ima+0x4c/0x120\n[c00000000371fbf0] [c000000000012240] do_one_initcall+0x60/0x2c0\n[c00000000371fcc0] [c000000002004ad0] kernel_init_freeable+0x344/0x3ec\n[c00000000371fda0] [c0000000000128a4] kernel_init+0x34/0x1b0\n[c00000000371fe10] [c00000000000ce64] ret_from_kernel_thread+0x5c/0x64\nInstruction dump:\nf92100b8 f92100c0 90e10090 910100a0 4182050c 282a0017 3bc00000 40810330\n7c0802a6 fb610198 7c9b2378 f80101d0 <a1240000> 2c090001 40820614 e9240010\n---[ end trace 0000000000000000 ]---\nFix this issue by checking returned PFN range of previous kernel's\nima-kexec-buffer with page_is_ram() to ensure correct memory bounds." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2025-05-13T00:00:00Z",
    "advisory" : "RHSA-2025:6966",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-570.12.1.el9_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2025-05-13T00:00:00Z",
    "advisory" : "RHSA-2025:6966",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-570.12.1.el9_6"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "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" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "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-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-50159\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50159\nhttps://lore.kernel.org/linux-cve-announce/2025061825-CVE-2022-50159-a387@gregkh/T" ],
  "name" : "CVE-2022-50159",
  "csaw" : false
}