CVE-2026-98081

Summary

In the Linux kernel, the following vulnerability has been resolved:

btrfs: zoned: finish active block group cleanup if call_zone_finish() fails

do_zone_finish() clears BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE before finishing the zones. If call_zone_finish() then fails it returned early, leaving the now inactive block group on fs_info->zone_active_bgs, leaking its reference, the BTRFS_FS_NEED_ZONE_FINISH waiters are never woken, and as its alloc_offset equals the zone capacity btrfs_zone_finish_one_bg() keeps selecting it, spinning btrfs_zoned_activate_one_bg().

Fall through to the cleanup on failure too and return the error, but keep the block group read-only as its zones are left inconsistent.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd70cbdda75da3f258118a558c087157e073229fb < 36b9cdab44848f25879ca625275c92b007f84653affected
LinuxLinuxd70cbdda75da3f258118a558c087157e073229fb < 40370f02a1ca3760f8925ffcbe76eb4d91ea758daffected
LinuxLinuxd70cbdda75da3f258118a558c087157e073229fb < e1b168a53174b385e3548bfbd079513b22ac240caffected
LinuxLinuxd70cbdda75da3f258118a558c087157e073229fb < a18a6b93a2843b9d103d3456bbd4b3f90282a379affected
LinuxLinux5.19affected
LinuxLinux0 < 5.19unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References