CVE-2026-98090
Linux kernel: use-after-free can lead to denial of service
- Risk score
- 43/100
- CVSS
- 5.5 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 25 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 spro…
- Affected
- Linux kernel
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.5 medium
- On your watchlist: linux kernel
References
- https://git.kernel.org/stable/c/0a0ee38ad6324ac1603079bb785f784191576bd5
- https://git.kernel.org/stable/c/2ee5c4bc11007c51f63f0c1be5d3f07f2b404ff7
- https://git.kernel.org/stable/c/46863a9f93186e620c70584f91c8d5d95da83eff
- https://git.kernel.org/stable/c/49179f13c04735c55fd0f43b03696c015b067137
- https://git.kernel.org/stable/c/b79b4b29003690acfade8241998fc0104ef9c84c
- https://git.kernel.org/stable/c/e0b54613aabeb8e9da597f23b90c6a03d0981986
- https://git.kernel.org/stable/c/e127ac29a52134d0f4cba39d38e4b375deb3d1aa
Original description
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.
Last activity 25 Sep 2026. Patch Forecast updates every hour.