CVE-2026-31666High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref() After commit 1618aa3c2e01 ("btrfs: simplify return variables in lookup_extent_data_re…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref()
After commit 1618aa3c2e01 ("btrfs: simplify return variables in lookup_extent_data_ref()"), the err and ret variables were merged into a single ret variable. However, when btrfs_next_leaf() returns 0 (success), ret is overwritten from -ENOENT to 0. If the first key in the next leaf does not match (different objectid or type), the function returns 0 instead of -ENOENT, making the caller believe the lookup succeeded when it did not. This can lead to operations on the wrong extent tree item, potentially causing extent tree corruption.
Fix this by returning -ENOENT directly when the key does not match, instead of relying on the ret variable.
Linux >= 1618aa3c2e0163f5ac34d514ae89474521910536 < 4125a194db4a6cf91f619f38788272651cb97dceLinux >= 1618aa3c2e0163f5ac34d514ae89474521910536 < 450e6a685d0cad95b15f8af152057bd0bf79f50bLinux >= 1618aa3c2e0163f5ac34d514ae89474521910536 < ab1e022379c3c811aa72da8eb0c7507859a1d0f5Linux >= 1618aa3c2e0163f5ac34d514ae89474521910536 < 316fb1b3169efb081d2db910cbbfef445afa03b9Linux 6.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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