{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-54155",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54155",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-24T13:07:05.385Z",
    "updatedAt": "2026-05-11T19:56:33.077Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net: core: remove unnecessary frame_sz check in bpf_xdp_adjust_tail()",
      "summary": "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->frame_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 <TASK>\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->frame_sz > PAGE_SIZE check was introduced in commit c8741e2bfe87\n(\"xdp: Allow bpf_xdp_adjust_tail() to grow packet size\"). But Jesper\nDangaard Brouer <jbrouer@redhat.com> noted that after introducing the\nxdp_init_buff() which all XDP driver use - it's 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 <jbrouer@redhat.com> that XDP can\nwork on higher order pages, as long as this is contiguous physical\nmemory (e.g. a page).",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "43b5169d8355ccf26d726fbc75f083b2429113e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a09c258cfa77d3ba0a7acc555c73eb6b005c4bd8"
            },
            {
              "version": "43b5169d8355ccf26d726fbc75f083b2429113e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "20acffcdc2b74fb7dcc4e299f7aca173df89d911"
            },
            {
              "version": "43b5169d8355ccf26d726fbc75f083b2429113e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d9252d67ed2f921c230bba449ee051b5c32e4841"
            },
            {
              "version": "43b5169d8355ccf26d726fbc75f083b2429113e4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d14eea09edf427fa36bd446f4a3271f99164202f"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.12",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.12"
            },
            {
              "version": "5.15.127",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.4.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "version": "6.5",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}