What’s Vulnerable › Vulnerabilities

CVE-2026-89837: f2fs: fix dentry folio leak in find_in_level

• 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: 2026-09-16 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix dentry folio leak in find_in_level find_in_level() gets a dentry folio with f2fs_find_data_folio() before calling find_in_block(). If find_in_block() returns an error, the function stores the error in res_folio and breaks out of the loop without dropping the dentry folio. This leaks the folio reference on the find_in_block() error path. Drop the dentry folio before returning the error to the caller.

Affected products

• Linux: 5.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3b8593f7965fcb22672d98b55ae2e9410ea3d9f7
• https://git.kernel.org/stable/c/93a3e6a4c9e726a13a935963e8dc43d181db1527
• https://git.kernel.org/stable/c/aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922
• https://git.kernel.org/stable/c/af9cc316d31371824de8d409260a2ab9759dd51c
• https://git.kernel.org/stable/c/b6c0e77d950bf80ab357e2b4b9667f4389ed417c
• https://git.kernel.org/stable/c/cca7d3e30bf30333314e31bc70b9a739f1342167
• https://git.kernel.org/stable/c/d2011b371fcb9247b2ef4ea2d852401a6c82ab88

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