CVE-2026-90161: high-severity vulnerability in Linux
erofs: fix interlaced ztailpacking pclusters
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Affected products
Linux · LinuxRelated CVEs — Linux
In the same product, most dangerous first.
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