DEBIAN-CVE-2025-68794

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2025-68794
Downstream
DSA-6126-1
Published: 13 Jan 2026, 16:16
Last modified:28 Apr 2026, 20:30

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

13 Jan 2026, 16:16
Published
Vulnerability first disclosed
28 Apr 2026, 20:30
Last Modified
Vulnerability information updated

Description

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.

Affected Systems

  • debian•linux

    all | all | all | < 6.12.69-1 | < 6.18.3-1

References (1)