PatchTheCEVCVE-2026-98090: In the Linux kernel, the following vulnerability has been resolved: btrfs: restore active device pointers aft
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Routine
MEDIUM 5.5WATCHLISTUPGRADE
CVE-2026-98090 is a medium-severity flaw (CVSS 5.5) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 dere
Why this priority
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 94%) |
| CISA exploited list | No |
| Weakness | CWE-416 |
| Published | 2026-09-25 |
| Last modified | 2026-10-23 |
Publisher (CNA): kernel.org · Vendor: linux
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
linux linux kernel UPGRADE
Affected: >= 5.13 and < 5.15.222 · >= 5.16 and < 6.1.189 · >= 6.2 and < 6.6.158 · >= 6.7 and < 6.12.111 · >= 6.13 and < 6.18.53 · >= 6.19 and < 7.2.7 · 7.3 rc1
Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
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