What is CVE-2025-68794?

CVE-2025-68794 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.19 onward and patched in 6.6.120, 6.12.64, 6.18.3 and others. CVE-2025-68794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-68794?

CVE-2025-68794 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2025-68794?

Yes, CVE-2025-68794 has been patched. Fixed versions include 6.6.120, 6.12.64, 6.18.3 and others. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-68794 actively exploited?

CVE-2025-68794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-68794

In the Linux kernel, the following vulnerability has been resolved: iomap: adjust read range correctly for non-block-aligned positions iomap_adjust_read_range() assumes that the position and length passed in are block-aligned. This is not always the case however, as shown in the syzbot generated case for erofs. This causes too many bytes to be skipped for uptodate blocks, which results in returning the incorrect position and length to read in. If all the blocks are uptodate, this underflows length and returns a position beyond the folio. Fix the calculation to also take into account the block offset when calculating how many bytes can be skipped for uptodate blocks.

Package Linux Kernel

Published 2026-01-13

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.19 and later are affected. Fixed in 6.6.120, 6.12.64, 6.18.3, 6.19 and their respective stable series.

Affected from

≥ 4.19

Fixed in

✓ 6.6.120 6.6.x ✓ 6.12.64 6.12.x ✓ 6.18.3 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2025-68794 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e
Patch
Kernel patch commit
https://git.kernel.org/stable/c/142194fb21afe964d2d194cab1fc357cbf87e899
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7aa6bc3e8766990824f66ca76c19596ce10daf3e
Patch

4 patch commits total View all on NVD

Frequently asked questions

What is CVE-2025-68794?

CVE-2025-68794 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.19 onward and has been patched in 6.6.120, 6.12.64, 6.18.3 and others. CVE-2025-68794 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2025-68794?

Yes — CVE-2025-68794 has been patched. Fixed versions include 6.6.120, 6.12.64, 6.18.3 and others. If you are running Linux kernel 4.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-68794 actively exploited?

No — CVE-2025-68794 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.