{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap  The bpf_lwt_xmit_push_encap helper needs to access skb_dst(skb)-\u003edev to calculate the needed headroom:  \terr = skb_cow_head(skb, \t\t\t   len + LL_RESERVED_SPACE(skb_dst(skb)-\u003edev));  But skb-\u003e_skb_refdst may not be initialized when the skb is set up by bpf_prog_test_run_skb function. Executing bpf_lwt_push_ip_encap function in this scenario will trigger null pointer dereference, causing a kernel crash as Yinhao reported:  [  105.186365] BUG: kernel NULL pointer dereference, address: 0000000000000000 [  105.186382] #PF: supervisor read access in kernel mode [  105.186388] #PF: error_code(0x0000) - not-present page [  105.186393] PGD 121d3d067 P4D 121d3d067 PUD 106c83067 PMD 0 [  105.186404] Oops: 0000 [#1] PREEMPT SMP NOPTI [  105.186412] CPU: 3 PID: 3250 Comm: poc Kdump: loaded Not tainted 6.19.0-rc5 #1 [  105.186423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [  105.186427] RIP: 0010:bpf_lwt_push_ip_encap+0x1eb/0x520 [  105.186443] Code: 0f 84 de 01 00 00 0f b7 4a 04 66 85 c9 0f 85 47 01 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e c3 cc cc cc cc 48 8b 73 58 48 83 e6 fe \u003c48\u003e 8b 36 0f b7 be ec 00 00 00 0f b7 b6 e6 00 00 00 01 fe 83 e6 f0 [  105.186449] RSP: 0018:ffffbb0e0387bc50 EFLAGS: 00010246 [  105.186455] RAX: 000000000000004e RBX: ffff94c74e036500 RCX: ffff94c74874da00 [  105.186460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff94c74e036500 [  105.186463] RBP: 0000000000000001 R08: 0000000000000002 R09: 0000000000000000 [  105.186467] R10: ffffbb0e0387bd50 R11: 0000000000000000 R12: ffffbb0e0387bc98 [  105.186471] R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000002 [  105.186484] FS:  00007f166aa4d680(0000) GS:ffff94c8b7780000(0000) knlGS:0000000000000000 [  105.186490] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [  105.186494] CR2: 0000000000000000 CR3: 000000015eade001 CR4: 0000000000770ee0 [  105.186499] PKRU: 55555554 [  105.186502] Call Trace: [  105.186507]  \u003cTASK\u003e [  105.186513]  bpf_lwt_xmit_push_encap+0x2b/0x40 [  105.186522]  bpf_prog_a75eaad51e517912+0x41/0x49 [  105.186536]  ? kvm_clock_get_cycles+0x18/0x30 [  105.186547]  ? ktime_get+0x3c/0xa0 [  105.186554]  bpf_test_run+0x195/0x320 [  105.186563]  ? bpf_test_run+0x10f/0x320 [  105.186579]  bpf_prog_test_run_skb+0x2f5/0x4f0 [  105.186590]  __sys_bpf+0x69c/0xa40 [  105.186603]  __x64_sys_bpf+0x1e/0x30 [  105.186611]  do_syscall_64+0x59/0x110 [  105.186620]  entry_SYSCALL_64_after_hwframe+0x76/0xe0 [  105.186649] RIP: 0033:0x7f166a97455d  Temporarily add the setting of skb-\u003e_skb_refdst before bpf_test_run to resolve the issue.",
  "id": "DEBIAN-CVE-2026-53111",
  "modified": "2026-09-14T16:47:42.122583265Z",
  "published": "2026-06-24T17:17:25.453Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53111"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-53111"
  ]
}