What’s Vulnerable › Vulnerabilities

CVE-2026-97490: affs: handle set_blocksize failures

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

Description

In the Linux kernel, the following vulnerability has been resolved: affs: handle set_blocksize failures affs uses buffer_heads, which don't handle block size > PAGE_SIZE well. Without this, mounting we will hit the BUG_ON(offset >= folio_size(folio)); in folio_set_bh on the first __bread_gfp call.

Affected products

• Linux kernel: 2.6.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0861182af5983a39bd2a891966436c5679b74a45
• https://git.kernel.org/stable/c/bb45146a661934ef801f8fc62f88cdbcf6584ed1
• https://git.kernel.org/stable/c/c7f29c5d999093629712c63792abda89a36b428d
• https://git.kernel.org/stable/c/d05b0ee9b42cb3cc499272d1bc91609f7492a1a8
• https://git.kernel.org/stable/c/e01af5aa641039e000af855f448475316f0550fc
• https://git.kernel.org/stable/c/ea8a4a9f3cc101207611be724a8b83838de9a93f
• https://git.kernel.org/stable/c/f5d65b2811872e8f8b424860fa7c2500afbbc5a6

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