CVEvulnerability
CVE-2026-90161
7.1 HIGH
Official page ↗
- Status
- Received
- Published
- 2026-09-17
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Description
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix interlaced ztailpacking pclusters
On-disk sizes of interlaced pclusters should be block-aligned, and
ztailpacking interlaced pclusters should be invalid at all.
Currently, mkfs.erofs won't generate any interlaced pcluster with
ztailpacking enabled, so this doesn't affect any existing valid
filesystems.
However, crafted images can contain invalid interlaced ztailpacking
pclusters, resulting in an out-of-bounds read from a kmap'd page and
copying irrelevant kernel memory into userspace-visible page cache.
References
- https://git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595 git.kernel.org
- https://git.kernel.org/stable/c/795dca34a41545d377d19bc492b10bc789772410 git.kernel.org
- https://git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187 git.kernel.org
- https://git.kernel.org/stable/c/cd59f91cbc1e715cb5dc65773ee22123d70cb8f2 git.kernel.org
- https://git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054 git.kernel.org