CVE-2026-98090

Summary

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

btrfs: restore active device pointers after failed sprout

btrfs_init_new_device() switches latest_dev and possibly s_bdev from the seed device to the new sprout device before creating the first writable chunks.

If chunk creation or the subsequent sprout setup fails, the error path releases the new device without switching those pointers back. btrfs_show_devname() can then dereference the freed latest_dev and crash.

Restore the active device pointers to the latest seed device before removing and releasing the failed sprout device.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb7cb29e666fe79dda5dbe5f57fb7c92413bf161c < 2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7affected
LinuxLinuxb7cb29e666fe79dda5dbe5f57fb7c92413bf161c < e127ac29a52134d0f4cba39d38e4b375deb3d1aaaffected
LinuxLinuxb7cb29e666fe79dda5dbe5f57fb7c92413bf161c < b79b4b29003690acfade8241998fc0104ef9c84caffected
LinuxLinuxb7cb29e666fe79dda5dbe5f57fb7c92413bf161c < e0b54613aabeb8e9da597f23b90c6a03d0981986affected
LinuxLinuxa6e7e218a4d6488d56727a7d9aee1b7e78c0c485affected
LinuxLinux5.15.11 < 5.16affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc2 <= *unaffected

Weaknesses

References