CVE-2026-53111 (GCVE-0-2026-53111)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap
Summary
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)->dev to calculate the needed headroom: err = skb_cow_head(skb, len + LL_RESERVED_SPACE(skb_dst(skb)->dev)); But skb->_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 <48> 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] <TASK> [ 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->_skb_refdst before bpf_test_run to resolve the issue.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < 5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0 (git)
Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < c7ad31fb948fdd4905263f4324160682c3fa7bc6 (git)
Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < 599905c3f10bb83e6e6881d5a7f5cea5df07dc23 (git)
Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < 5500913516e071dbe23e5a404c861dd2d82c9589 (git)
Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < 94f95328b9070909b5b875c647b17a11d3d85567 (git)
Affected: 52f278774e796a553be0c869dcaaee6f259ca795 , < 972787479ee73006fddb5e59ab5c8e733810ff42 (git)
Create a notification for this product.
Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bpf/test_run.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            },
            {
              "lessThan": "c7ad31fb948fdd4905263f4324160682c3fa7bc6",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            },
            {
              "lessThan": "599905c3f10bb83e6e6881d5a7f5cea5df07dc23",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            },
            {
              "lessThan": "5500913516e071dbe23e5a404c861dd2d82c9589",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            },
            {
              "lessThan": "94f95328b9070909b5b875c647b17a11d3d85567",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            },
            {
              "lessThan": "972787479ee73006fddb5e59ab5c8e733810ff42",
              "status": "affected",
              "version": "52f278774e796a553be0c869dcaaee6f259ca795",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bpf/test_run.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.1"
            },
            {
              "lessThan": "5.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap\n\nThe bpf_lwt_xmit_push_encap helper needs to access skb_dst(skb)-\u003edev to\ncalculate the needed headroom:\n\n\terr = skb_cow_head(skb,\n\t\t\t   len + LL_RESERVED_SPACE(skb_dst(skb)-\u003edev));\n\nBut skb-\u003e_skb_refdst may not be initialized when the skb is set up by\nbpf_prog_test_run_skb function. Executing bpf_lwt_push_ip_encap function\nin this scenario will trigger null pointer dereference, causing a kernel\ncrash as Yinhao reported:\n\n[  105.186365] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[  105.186382] #PF: supervisor read access in kernel mode\n[  105.186388] #PF: error_code(0x0000) - not-present page\n[  105.186393] PGD 121d3d067 P4D 121d3d067 PUD 106c83067 PMD 0\n[  105.186404] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[  105.186412] CPU: 3 PID: 3250 Comm: poc Kdump: loaded Not tainted 6.19.0-rc5 #1\n[  105.186423] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  105.186427] RIP: 0010:bpf_lwt_push_ip_encap+0x1eb/0x520\n[  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\n[  105.186449] RSP: 0018:ffffbb0e0387bc50 EFLAGS: 00010246\n[  105.186455] RAX: 000000000000004e RBX: ffff94c74e036500 RCX: ffff94c74874da00\n[  105.186460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff94c74e036500\n[  105.186463] RBP: 0000000000000001 R08: 0000000000000002 R09: 0000000000000000\n[  105.186467] R10: ffffbb0e0387bd50 R11: 0000000000000000 R12: ffffbb0e0387bc98\n[  105.186471] R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000002\n[  105.186484] FS:  00007f166aa4d680(0000) GS:ffff94c8b7780000(0000) knlGS:0000000000000000\n[  105.186490] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  105.186494] CR2: 0000000000000000 CR3: 000000015eade001 CR4: 0000000000770ee0\n[  105.186499] PKRU: 55555554\n[  105.186502] Call Trace:\n[  105.186507]  \u003cTASK\u003e\n[  105.186513]  bpf_lwt_xmit_push_encap+0x2b/0x40\n[  105.186522]  bpf_prog_a75eaad51e517912+0x41/0x49\n[  105.186536]  ? kvm_clock_get_cycles+0x18/0x30\n[  105.186547]  ? ktime_get+0x3c/0xa0\n[  105.186554]  bpf_test_run+0x195/0x320\n[  105.186563]  ? bpf_test_run+0x10f/0x320\n[  105.186579]  bpf_prog_test_run_skb+0x2f5/0x4f0\n[  105.186590]  __sys_bpf+0x69c/0xa40\n[  105.186603]  __x64_sys_bpf+0x1e/0x30\n[  105.186611]  do_syscall_64+0x59/0x110\n[  105.186620]  entry_SYSCALL_64_after_hwframe+0x76/0xe0\n[  105.186649] RIP: 0033:0x7f166a97455d\n\nTemporarily add the setting of skb-\u003e_skb_refdst before bpf_test_run to resolve the issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:30:44.691Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5c8d1f91fc4898d79f29d79c1a6f7c2b3ee66fb0"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7ad31fb948fdd4905263f4324160682c3fa7bc6"
        },
        {
          "url": "https://git.kernel.org/stable/c/599905c3f10bb83e6e6881d5a7f5cea5df07dc23"
        },
        {
          "url": "https://git.kernel.org/stable/c/5500913516e071dbe23e5a404c861dd2d82c9589"
        },
        {
          "url": "https://git.kernel.org/stable/c/94f95328b9070909b5b875c647b17a11d3d85567"
        },
        {
          "url": "https://git.kernel.org/stable/c/972787479ee73006fddb5e59ab5c8e733810ff42"
        }
      ],
      "title": "bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53111",
    "datePublished": "2026-06-24T16:30:44.691Z",
    "dateReserved": "2026-06-09T07:44:35.385Z",
    "dateUpdated": "2026-06-24T16:30:44.691Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.