# CVE-2022-50765: CVE-2022-50765

Status: published. Published: 2025-12-24. Updated: 2026-11-10.

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().

## Remediation

No remediation reported in collected sources

## Affected products and versions

Not reported in collected sources.

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/090bfcfc9f14d05154893c67eeaecc56e894fbae (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/cbc32023ddbdf4baa3d9dc513a2184a84080a5a2 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/cdea2da6787583ecca43594132533a2ac8d7cd21 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50765; retrieved 2026-11-10; source updated 2026-11-10

Revision: 3c3cab0d6215e09f67ed07320a6040d1038a3695f67cc176ec0db54d9a141694

Canonical: https://y2.dev/cve/CVE-2022-50765

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