{
  "threat_severity" : "Moderate",
  "public_date" : "2025-07-25T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Linux kernel: Denial of Service due to data race in vmalloc's show_numa_info function",
    "id" : "2383425",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2383425"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-820",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nmm/vmalloc: fix data race in show_numa_info()\nThe following data-race was found in show_numa_info():\n==================================================================\nBUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show\nread to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0:\nshow_numa_info mm/vmalloc.c:4936 [inline]\nvmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016\nseq_read_iter+0x373/0xb40 fs/seq_file.c:230\nproc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\nwrite to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1:\nshow_numa_info mm/vmalloc.c:4934 [inline]\nvmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016\nseq_read_iter+0x373/0xb40 fs/seq_file.c:230\nproc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\nvalue changed: 0x0000008f -> 0x00000000\n==================================================================\nAccording to this report,there is a read/write data-race because\nm->private is accessible to multiple CPUs.  To fix this, instead of\nallocating the heap in proc_vmalloc_init() and passing the heap address to\nm->private, vmalloc_info_show() should allocate the heap.", "A flaw was found in the Linux kernel. A data race vulnerability exists in the `show_numa_info()` function within the `mm/vmalloc` component. This occurs because the `m->private` memory is accessible to multiple central processing units (CPUs) simultaneously, leading to inconsistent data reads and writes. A local attacker could exploit this to cause a system crash or other unpredictable behavior, resulting in a Denial of Service (DoS)." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-01-26T00:00:00Z",
    "advisory" : "RHSA-2026:1178",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "kernel-0:6.12.0-124.29.1.el10_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10.0 Extended Update Support",
    "release_date" : "2026-02-16T00:00:00Z",
    "advisory" : "RHSA-2026:2761",
    "cpe" : "cpe:/o:redhat:enterprise_linux_eus:10.0",
    "package" : "kernel-0:6.12.0-55.60.1.el10_0"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2025-38383\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38383\nhttps://lore.kernel.org/linux-cve-announce/2025072506-CVE-2025-38383-c967@gregkh/T" ],
  "name" : "CVE-2025-38383",
  "csaw" : false
}