CVE-2026-98879
Published Oct 23, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: isofs: handle set_blocksize failures isofs 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.
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References
Other References
https://git.kernel.org/stable/c/25ef4c4d9f0e96fb89c0ae0d7127c3f12a31bc32
https://git.kernel.org/stable/c/28d1f6aa14f5924e36602b7a31c9141d34de0b9c
https://git.kernel.org/stable/c/61f277bf35f533b602984f0e55900111fe52f31a
https://git.kernel.org/stable/c/6db7f0ba365786304558db6a3d52013ae176e03e
https://git.kernel.org/stable/c/9584ab6283721e5aab485c79bd06c2f78d89e55c
https://git.kernel.org/stable/c/9c97e3b1152d3092581745189f5d2f04c6404ef9
https://git.kernel.org/stable/c/cebde6d88e34396c29f2f001d90e921677cc17d6
Frequently Asked Questions
What is CVE-2026-98879? +
In the Linux kernel, the following vulnerability has been resolved:
isofs: handle set_blocksize failures
isofs 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.
How do I check if I'm vulnerable to CVE-2026-98879? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.