RISC-V: kexec: Fix memory leak of elf header buffer

{
  "id": "e05dba2e1f88cbf3d78f75c04ac140b84e0ef35c2189c1648c591cbb5bb29698",
  "url": "https://osv.dev/vulnerability/CVE-2022-50765",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RISC-V: kexec: Fix memory leak of elf header buffer",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: RISC-V: kexec: Fix memory leak of elf header buffer This is reported by kmemleak detector: unreferenced object 0xff2000000403d000 (size 4096): comm \"kexec\", pid 146, jiffies 4294900633 (age 64.792s) hex dump (first 32 bytes): 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 .ELF............ 04 00 f3 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000566ca97c>] kmemleak_vmalloc+0x3c/0xbe [<00000000979283d8>] __vmalloc_node_range+0x3ac/0x560 [<00000000b4b3712a>] __vmalloc_node+0x56/0x62 [<00000000854f75e2>] vzalloc+0x2c/0x34 [<00000000e9a00db9>] crash_prepare_elf64_headers+0x80/0x30c [<0000000067e8bf48>] elf_kexec_load+0x3e8/0x4ec [<0000000036548e09>] kexec_image_load_default+0x40/0x4c [<0000000079fbe1b4>] sys_kexec_file_load+0x1c4/0x322 [<0000000040c62c03>] ret_from_syscall+0x0/0x2 In elf_kexec_load(), a buffer is allocated via vzalloc() to store elf headers. While it's not freed back to system when kdump kernel is reloaded or unloaded, or when image->elf_header is successfully set and then fails to load kdump kernel for some reason. Fix it by freeing the buffer in arch_kimage_file_post_load_cleanup().",
    "evidence": "osv:CVE-2022-50765",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.0.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50765",
      "aliases": [
        "CVE-2022-50765"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8acea455fafaf2620b247de6c00774828b618a82"
                },
                {
                  "fixed": "090bfcfc9f14d05154893c67eeaecc56e894fbae"
                },
                {
                  "fixed": "cdea2da6787583ecca43594132533a2ac8d7cd21"
                },
                {
                  "fixed": "cbc32023ddbdf4baa3d9dc513a2184a84080a5a2"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50765.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.0.18"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
                },
                {
                  "fixed": "6.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50765.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.602056658Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/090bfcfc9f14d05154893c67eeaecc56e894fbae",
        "https://git.kernel.org/stable/c/cbc32023ddbdf4baa3d9dc513a2184a84080a5a2",
        "https://git.kernel.org/stable/c/cdea2da6787583ecca43594132533a2ac8d7cd21",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50765.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50765",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50765.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50765",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503956,
  "published_at": "2025-12-24T13:05:56.123+00:00"
}