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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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        "full_product_name": {
          "name": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64 as a component of Debian 10",
          "product_id": "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64"
        },
        "product_reference": "linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64",
        "relates_to_product_reference": "Debian-10"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-23407",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix missing bounds check on DEFAULT table in verify_dfa()\n\nThe verify_dfa() function only checks DEFAULT_TABLE bounds when the state\nis not differentially encoded.\n\nWhen the verification loop traverses the differential encoding chain,\nit reads k = DEFAULT_TABLE[j] and uses k as an array index without\nvalidation. A malformed DFA with DEFAULT_TABLE[j] >= state_count,\ntherefore, causes both out-of-bounds reads and writes.\n\n[   57.179855] ==================================================================\n[   57.180549] BUG: KASAN: slab-out-of-bounds in verify_dfa+0x59a/0x660\n[   57.180904] Read of size 4 at addr ffff888100eadec4 by task su/993\n\n[   57.181554] CPU: 1 UID: 0 PID: 993 Comm: su Not tainted 6.19.0-rc7-next-20260127 #1 PREEMPT(lazy)\n[   57.181558] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   57.181563] Call Trace:\n[   57.181572]  <TASK>\n[   57.181577]  dump_stack_lvl+0x5e/0x80\n[   57.181596]  print_report+0xc8/0x270\n[   57.181605]  ? verify_dfa+0x59a/0x660\n[   57.181608]  kasan_report+0x118/0x150\n[   57.181620]  ? verify_dfa+0x59a/0x660\n[   57.181623]  verify_dfa+0x59a/0x660\n[   57.181627]  aa_dfa_unpack+0x1610/0x1740\n[   57.181629]  ? __kmalloc_cache_noprof+0x1d0/0x470\n[   57.181640]  unpack_pdb+0x86d/0x46b0\n[   57.181647]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181653]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181656]  ? aa_unpack_nameX+0x1a8/0x300\n[   57.181659]  aa_unpack+0x20b0/0x4c30\n[   57.181662]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181664]  ? stack_depot_save_flags+0x33/0x700\n[   57.181681]  ? kasan_save_track+0x4f/0x80\n[   57.181683]  ? kasan_save_track+0x3e/0x80\n[   57.181686]  ? __kasan_kmalloc+0x93/0xb0\n[   57.181688]  ? __kvmalloc_node_noprof+0x44a/0x780\n[   57.181693]  ? aa_simple_write_to_buffer+0x54/0x130\n[   57.181697]  ? policy_update+0x154/0x330\n[   57.181704]  aa_replace_profiles+0x15a/0x1dd0\n[   57.181707]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181710]  ? __kvmalloc_node_noprof+0x44a/0x780\n[   57.181712]  ? aa_loaddata_alloc+0x77/0x140\n[   57.181715]  ? srso_alias_return_thunk+0x5/0xfbef5\n[   57.181717]  ? _copy_from_user+0x2a/0x70\n[   57.181730]  policy_update+0x17a/0x330\n[   57.181733]  profile_replace+0x153/0x1a0\n[   57.181735]  ? rw_verify_area+0x93/0x2d0\n[   57.181740]  vfs_write+0x235/0xab0\n[   57.181745]  ksys_write+0xb0/0x170\n[   57.181748]  do_syscall_64+0x8e/0x660\n[   57.181762]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   57.181765] RIP: 0033:0x7f6192792eb2\n\nRemove the MATCH_FLAG_DIFF_ENCODE condition to validate all DEFAULT_TABLE\nentries unconditionally.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "under_investigation": [
          "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libbpf-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:libcpupower1-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-compiler-gcc-8-x86-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-config-4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-doc-4.19-0:4.19.325-1+tuxcare.els1.all",
          "Debian-10:linux-headers-4.19.0-28-all-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-headers-4.19.0-28-common-0:4.19.325-1+tuxcare.els1.all",
          "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-image-amd64-signed-template-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-kbuild-4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-perf-4.19-0:4.19.325-1+tuxcare.els1.amd64",
          "Debian-10:linux-source-4.19-0:4.19.325-1+tuxcare.els1.all",
          "Debian-10:linux-support-4.19.0-28-0:4.19.325-1+tuxcare.els1.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-23407"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/22094c996968a7c5b59cd3fc9fcbdfdd46d02fec",
          "url": "https://git.kernel.org/stable/c/22094c996968a7c5b59cd3fc9fcbdfdd46d02fec"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/555829fd91eaf0711e369b0a92aecb0f0aa3281f",
          "url": "https://git.kernel.org/stable/c/555829fd91eaf0711e369b0a92aecb0f0aa3281f"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/5a68e46dfe0c8c8ffc6f425ebc4cae6238566ecc",
          "url": "https://git.kernel.org/stable/c/5a68e46dfe0c8c8ffc6f425ebc4cae6238566ecc"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/76b4d36c5122866452d34d8f79985e191f9c3831",
          "url": "https://git.kernel.org/stable/c/76b4d36c5122866452d34d8f79985e191f9c3831"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/7c7cf05e0606f554c467e3a4dc49e2e578a755b4",
          "url": "https://git.kernel.org/stable/c/7c7cf05e0606f554c467e3a4dc49e2e578a755b4"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/a75e12ca90c9e70ba10fee1be2f63cdd63d91a7c",
          "url": "https://git.kernel.org/stable/c/a75e12ca90c9e70ba10fee1be2f63cdd63d91a7c"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/d352873bbefa7eb39995239d0b44ccdf8aaa79a4",
          "url": "https://git.kernel.org/stable/c/d352873bbefa7eb39995239d0b44ccdf8aaa79a4"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/f39e126e56c6ec1930fae51ad6bca3dae2a4c3ed",
          "url": "https://git.kernel.org/stable/c/f39e126e56c6ec1930fae51ad6bca3dae2a4c3ed"
        }
      ],
      "release_date": "2026-04-01T08:36:37Z",
      "remediations": [
        {
          "category": "none_available",
          "date": "2026-08-06T12:19:25.380489Z",
          "details": "Affected",
          "product_ids": [
            "Debian-10:hyperv-daemons-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:libbpf-dev-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:libbpf4.19-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:libcpupower-dev-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:libcpupower1-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-compiler-gcc-8-x86-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-config-4.19-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-cpupower-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-doc-4.19-0:4.19.325-1+tuxcare.els1.all",
            "Debian-10:linux-headers-4.19.0-28-all-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-headers-4.19.0-28-all-amd64-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-headers-4.19.0-28-amd64-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-headers-4.19.0-28-common-0:4.19.325-1+tuxcare.els1.all",
            "Debian-10:linux-image-4.19.0-28-amd64-unsigned-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-image-amd64-signed-template-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-kbuild-4.19-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-libc-dev-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-perf-4.19-0:4.19.325-1+tuxcare.els1.amd64",
            "Debian-10:linux-source-4.19-0:4.19.325-1+tuxcare.els1.all",
            "Debian-10:linux-support-4.19.0-28-0:4.19.325-1+tuxcare.els1.all"
          ]
        }
      ]
    }
  ]
}