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.
References6
- git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595
- git.kernel.org/stable/c/795dca34a41545d377d19bc492b10bc789772410
- git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187
- git.kernel.org/stable/c/b634286a8628155557a4f473a9dbab18bb439a7b
- git.kernel.org/stable/c/cd59f91cbc1e715cb5dc65773ee22123d70cb8f2
- git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.