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CVE-2026-90420

Unknown

Last modified

CVE-2026-90420 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_clean_segments() syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g.

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_clean_segments() syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error). Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever. Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < 217b967ad7887a3e1ebc08f46f6484e081acd4b4; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < 3bcdbdaac884a4baa59716cf9bd9470c75276e2d; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < d7afca8e4efbf4c455b4663c29ae59fde2f1b671; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < c07e5ad6539e7e9350d5c65cbf8adb69d1711b15; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < 1fc6df85b4954b6fda9c351843aaca3c06f66d8d; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8; >= 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453, < ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18
LinuxLinux2.6.30

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90420?
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_clean_segments() syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error). Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever. Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.
How severe is CVE-2026-90420?
Severity scoring for CVE-2026-90420 is pending analysis.
How do I fix CVE-2026-90420?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST