{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-06T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: netconsole: avoid OOB reads, msg is not nul-terminated",
    "id" : "2467238",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2467238"
  },
  "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-170",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nnetconsole: avoid OOB reads, msg is not nul-terminated\nmsg passed to netconsole from the console subsystem is not guaranteed\nto be nul-terminated. Before recent\ncommit 7eab73b18630 (\"netconsole: convert to NBCON console infrastructure\")\nthe message would be placed in printk_shared_pbufs, a static global\nbuffer, so KASAN had harder time catching OOB accesses. Now we see:\nprintk: console [netcon_ext0] enabled\nBUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240\nRead of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594\nCPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9\nCall Trace:\nkasan_report+0xe4/0x120\nstring+0x1f7/0x240\nvsnprintf+0x655/0xba0\nscnprintf+0xba/0x120\nnetconsole_write+0x3fe/0xa10\nnbcon_emit_next_record+0x46e/0x860\nnbcon_kthread_func+0x623/0x750\nAllocated by task 1:\nnbcon_alloc+0x1ea/0x450\nregister_console+0x26b/0xe10\ninit_netconsole+0xbb0/0xda0\nThe buggy address belongs to the object at ffff88813b6d4000\nwhich belongs to the cache kmalloc-4k of size 4096\nThe buggy address is located 0 bytes to the right of\nallocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)", "A flaw was found in the Linux kernel's netconsole component. The system processes messages from the console subsystem without ensuring they are properly terminated, which can lead to an out-of-bounds read. This vulnerability allows a local attacker to trigger a kernel crash, resulting in a Denial of Service (DoS) for the affected system." ],
  "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" : "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-2026-43197\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43197\nhttps://lore.kernel.org/linux-cve-announce/2026050644-CVE-2026-43197-37f5@gregkh/T" ],
  "name" : "CVE-2026-43197",
  "csaw" : false
}