CVE-2026-43289 (GCVE-0-2026-43289)
Vulnerability from cvelistv5
Published
2026-05-08 13:11
Modified
2026-05-23 16:06
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: <TASK> bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
References
Impacted products
Vendor Product Version
Linux Linux Version: f368aed4827bd4276c0e3664fb2cb815a8d7caf3
Version: d38e051ec6fd8650b139d9bc4b0b8b261953b263
Version: 013027918a4efa807409fcb356009c117e4d181a
Version: 8652d44f466ad5772e7d1756e9457046189b0dfc
Version: 8652d44f466ad5772e7d1756e9457046189b0dfc
Version: 8652d44f466ad5772e7d1756e9457046189b0dfc
Version: 8652d44f466ad5772e7d1756e9457046189b0dfc
Version: 8652d44f466ad5772e7d1756e9457046189b0dfc
Version: 4947a0eb7d642b6048559857964966016ef3aa8b
Version: b16bf76b382810257e3fb6278663a9d131b70197
Version: cb1638618545182a01444b2b20a4ed6b9d2a8c8f
Version: 5.10.185   ≤
Version: 5.15.118   ≤
Version: 6.1.35   ≤
Version: 4.19.287   ≤
Version: 5.4.248   ≤
Version: 6.3.9   ≤
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{
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkexec: derive purgatory entry from symbol\n\nkexec_load_purgatory() derives image-\u003estart by locating e_entry inside an\nSHF_EXECINSTR section.  If the purgatory object contains multiple\nexecutable sections with overlapping sh_addr, the entrypoint check can\nmatch more than once and trigger a WARN.\n\nDerive the entry section from the purgatory_start symbol when present and\ncompute image-\u003estart from its final placement.  Keep the existing e_entry\nfallback for purgatories that do not expose the symbol.\n\nWARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784\nCall Trace:\n \u003cTASK\u003e\n bzImage64_load+0x133/0xa00\n __do_sys_kexec_file_load+0x2b3/0x5c0\n do_syscall_64+0x81/0x610\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\n[me@linux.beauty: move helper to avoid forward declaration, per Baoquan]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:06:38.103Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/027797595a108726f4a0a45d225f603b0ffbd22b"
        },
        {
          "url": "https://git.kernel.org/stable/c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95"
        },
        {
          "url": "https://git.kernel.org/stable/c/f736032c638a33a243e9126e617788f763d648f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2"
        },
        {
          "url": "https://git.kernel.org/stable/c/875355152b33436907c2a6d2ffad1431fa86c62b"
        },
        {
          "url": "https://git.kernel.org/stable/c/36eb314184a0ae74dd42914b47d2b9fc43be8034"
        },
        {
          "url": "https://git.kernel.org/stable/c/5226570bd252cea2e805a161cb0f75c204c3108a"
        },
        {
          "url": "https://git.kernel.org/stable/c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d"
        }
      ],
      "title": "kexec: derive purgatory entry from symbol",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43289",
    "datePublished": "2026-05-08T13:11:13.860Z",
    "dateReserved": "2026-05-01T14:12:55.999Z",
    "dateUpdated": "2026-05-23T16:06:38.103Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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