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CVE-2023-54155 (GCVE-0-2023-54155)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:07 – Updated: 2026-05-11 19:56
VLAI
Title
net: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail() Syzkaller reported the following issue: ======================================= Too BIG xdp->frame_sz = 131072 WARNING: CPU: 0 PID: 5020 at net/core/filter.c:4121 ____bpf_xdp_adjust_tail net/core/filter.c:4121 [inline] WARNING: CPU: 0 PID: 5020 at net/core/filter.c:4121 bpf_xdp_adjust_tail+0x466/0xa10 net/core/filter.c:4103 ... Call Trace: <TASK> bpf_prog_4add87e5301a4105+0x1a/0x1c __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run_xdp include/linux/filter.h:775 [inline] bpf_prog_run_generic_xdp+0x57e/0x11e0 net/core/dev.c:4721 netif_receive_generic_xdp net/core/dev.c:4807 [inline] do_xdp_generic+0x35c/0x770 net/core/dev.c:4866 tun_get_user+0x2340/0x3ca0 drivers/net/tun.c:1919 tun_chr_write_iter+0xe8/0x210 drivers/net/tun.c:2043 call_write_iter include/linux/fs.h:1871 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x650/0xe40 fs/read_write.c:584 ksys_write+0x12f/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd xdp->frame_sz > PAGE_SIZE check was introduced in commit c8741e2bfe87 ("xdp: Allow bpf_xdp_adjust_tail() to grow packet size"). But Jesper Dangaard Brouer <jbrouer@redhat.com> noted that after introducing the xdp_init_buff() which all XDP driver use - it's safe to remove this check. The original intend was to catch cases where XDP drivers have not been updated to use xdp.frame_sz, but that is not longer a concern (since xdp_init_buff). Running the initial syzkaller repro it was discovered that the contiguous physical memory allocation is used for both xdp paths in tun_get_user(), e.g. tun_build_skb() and tun_alloc_skb(). It was also stated by Jesper Dangaard Brouer <jbrouer@redhat.com> that XDP can work on higher order pages, as long as this is contiguous physical memory (e.g. a page).
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 43b5169d8355ccf26d726fbc75f083b2429113e4 , < a09c258cfa77d3ba0a7acc555c73eb6b005c4bd8 (git)
Affected: 43b5169d8355ccf26d726fbc75f083b2429113e4 , < 20acffcdc2b74fb7dcc4e299f7aca173df89d911 (git)
Affected: 43b5169d8355ccf26d726fbc75f083b2429113e4 , < d9252d67ed2f921c230bba449ee051b5c32e4841 (git)
Affected: 43b5169d8355ccf26d726fbc75f083b2429113e4 , < d14eea09edf427fa36bd446f4a3271f99164202f (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.127 , ≤ 5.15.* (semver)
Unaffected: 6.1.46 , ≤ 6.1.* (semver)
Unaffected: 6.4.11 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
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          "versions": [
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          "vendor": "Linux",
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              "version": "5.12"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.15.127",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.46",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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                {
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              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail()\n\nSyzkaller reported the following issue:\n=======================================\nToo BIG xdp-\u003eframe_sz = 131072\nWARNING: CPU: 0 PID: 5020 at net/core/filter.c:4121\n  ____bpf_xdp_adjust_tail net/core/filter.c:4121 [inline]\nWARNING: CPU: 0 PID: 5020 at net/core/filter.c:4121\n  bpf_xdp_adjust_tail+0x466/0xa10 net/core/filter.c:4103\n...\nCall Trace:\n \u003cTASK\u003e\n bpf_prog_4add87e5301a4105+0x1a/0x1c\n __bpf_prog_run include/linux/filter.h:600 [inline]\n bpf_prog_run_xdp include/linux/filter.h:775 [inline]\n bpf_prog_run_generic_xdp+0x57e/0x11e0 net/core/dev.c:4721\n netif_receive_generic_xdp net/core/dev.c:4807 [inline]\n do_xdp_generic+0x35c/0x770 net/core/dev.c:4866\n tun_get_user+0x2340/0x3ca0 drivers/net/tun.c:1919\n tun_chr_write_iter+0xe8/0x210 drivers/net/tun.c:2043\n call_write_iter include/linux/fs.h:1871 [inline]\n new_sync_write fs/read_write.c:491 [inline]\n vfs_write+0x650/0xe40 fs/read_write.c:584\n ksys_write+0x12f/0x250 fs/read_write.c:637\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nxdp-\u003eframe_sz \u003e PAGE_SIZE check was introduced in commit c8741e2bfe87\n(\"xdp: Allow bpf_xdp_adjust_tail() to grow packet size\"). But Jesper\nDangaard Brouer \u003cjbrouer@redhat.com\u003e noted that after introducing the\nxdp_init_buff() which all XDP driver use - it\u0027s safe to remove this\ncheck. The original intend was to catch cases where XDP drivers have\nnot been updated to use xdp.frame_sz, but that is not longer a concern\n(since xdp_init_buff).\n\nRunning the initial syzkaller repro it was discovered that the\ncontiguous physical memory allocation is used for both xdp paths in\ntun_get_user(), e.g. tun_build_skb() and tun_alloc_skb(). It was also\nstated by Jesper Dangaard Brouer \u003cjbrouer@redhat.com\u003e that XDP can\nwork on higher order pages, as long as this is contiguous physical\nmemory (e.g. a page)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:56:33.077Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/a09c258cfa77d3ba0a7acc555c73eb6b005c4bd8"
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        {
          "url": "https://git.kernel.org/stable/c/20acffcdc2b74fb7dcc4e299f7aca173df89d911"
        },
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          "url": "https://git.kernel.org/stable/c/d9252d67ed2f921c230bba449ee051b5c32e4841"
        },
        {
          "url": "https://git.kernel.org/stable/c/d14eea09edf427fa36bd446f4a3271f99164202f"
        }
      ],
      "title": "net: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail()",
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        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54155",
    "datePublished": "2025-12-24T13:07:05.385Z",
    "dateReserved": "2025-12-24T13:02:52.530Z",
    "dateUpdated": "2026-05-11T19:56:33.077Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "cve": "CVE-2023-54155",
      "date": "2026-09-15",
      "epss": "0.00195",
      "percentile": "0.09386"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:43:39+00:00",
      "cve": "CVE-2023-54155",
      "id": "CVE-2023-54155",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "84",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of service in network core via incorrect frame size handling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54155.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-05T00:46:45Z",
      "cve": "CVE-2023-54155",
      "id": "CVE-2023-54155",
      "initial_release_date": "2025-12-25T00:54:21Z",
      "product_status:known_affected": "628",
      "product_status:known_not_affected": "165",
      "product_status:recommended": "241",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54155",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54155.json",
      "version": "36"
    }
  }
}



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