CVE-2025-68794 | BDVDB-2026-310249 Detail
LinuxLinux
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.
Weaknesses#
- CWE-190 Integer Overflow or Wraparound
References#
- https://git.kernel.org/stable/c/ce20f49ac9194cf81a77f01d1c316d7c17ae753c
- https://git.kernel.org/stable/c/275b37a1e5c2c8abd313e8075f6aec9a349f291b
- https://git.kernel.org/stable/c/b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac
- https://git.kernel.org/stable/c/82b60ffbb532d919959702768dca04c3c0500ae5
- https://git.kernel.org/stable/c/12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e
- https://git.kernel.org/stable/c/142194fb21afe964d2d194cab1fc357cbf87e899
- https://git.kernel.org/stable/c/7aa6bc3e8766990824f66ca76c19596ce10daf3e
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.