CVE-2026-90266
kernel: btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 14, 2026
Description
A flaw was found in the Linux kernel's btrfs zoned filesystem. When metadata over-commitment occurs during a reclaim operation, the btrfs_delayed_refs_rsv_refill() function may return a transient error (-EAGAIN). This error can cause the current transaction to abort, leading to the filesystem being forced into a read-only state. This could result in a denial of service, preventing further write operations until the system is restarted or the issue is manually resolved.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-390 · Detection of Error Condition Without Action