In the Linux kernel, the following vulnerability has been resolved: ext4: don't enable large folios on encrypted inodes Commit 709f0f1f…
CVE-2026-98941 · GHSA-jjvw-qjpr-6rpv · EUVD-2026-108913 · published 23 Oct 2026
How serious is it
- Severity: high, CVSS score 7 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-98941?
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Who is affected
- Linux Linux: 709f0f1f1bf5ca62a000084e5446ca6b57c8678c <40554d1221e3d2ff2e0d192b74a05d89eb3620e7
- Linux Linux: patch: 7.2.10
- Linux Linux: 6.19
- Linux Linux: patch: 0
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
ext4: don't enable large folios on encrypted inodes
Commit 709f0f1f1bf5 ("ext4: add checks for large folio
incompatibilities when BS > PS") disables large folios at mount time
if the "encrypt" feature is set. However, enabling that feature on a
mounted filesystem circumvents that check, and writing encrypted data
results in a crash:
BUG: kernel NULL pointer dereference, address: 0000000000000028
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:ext4_finish_bio+0xf7/0x3e0
Call Trace:
ext4_release_io_end+0x51/0x110
ext4_end_io_end+0x4c/0xe0
ext4_end_io_rsv_work+0xb3/0x100
Fix this by disabling large folios on encrypted inodes, as is
already done for inodes that use data journaling.
This affects all kernels between v6.19 and v7.2, but it is not needed
in v7.3, where the code was significantly refactored.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/40554d1221e3d2ff2e0d192b74a05d89eb3620e7
- nvd.nist.gov/vuln/detail/CVE-2026-98941
Merged from ENISA EUVD. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON