PT-2026-52024 · Linux · Linux Kernel

Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-53130

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An unsigned underflow occurs in the omfs make empty() function when processing a crafted filesystem image. The omfs fill super() function fails to reject s sys blocksize values smaller than OMFS DIR START (440). Consequently, the calculation sbi->s sys blocksize - OMFS DIR START results in a value near 2^32, leading to a massive memset() operation that overwrites kernel memory beyond the backing block buffer.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-53130

Affected Products

Linux Kernel

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-53130 · Security Note
• https://git.kernel.org/stable/c/817f16ed62bc58a168417bfb5e859c2a370bab03 · Note
• https://twitter.com/CVEnew/status/2069845518323531957 · Twitter Post
• https://git.kernel.org/stable/c/5822a05a841a10794ad818620dd2af490b0705d3 · Note
• https://git.kernel.org/stable/c/6561afc38398e3518a29c5eebb975c30468f98a6 · Note
• https://git.kernel.org/stable/c/fbc72f5c645155dc2ed3573243ed20f9913e3a54 · Note
• https://git.kernel.org/stable/c/0621c385fda1376e967f37ccd534c26c3e511d14 · Note
• https://git.kernel.org/stable/c/79f84af38c9fef9deb0e02c79eb969b5541c2644 · Note
• https://git.kernel.org/stable/c/131ea3e57fc22936ed0e2c8330f2e36106172f51 · Note
• https://git.kernel.org/stable/c/754ff1bea3819a90c6f33cccfc1a299ef7609f07 · Note