CVE-2026-97547: Linux kernel · xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 16:39 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available that disables reflink flag exchange when the XFS_EXCHMAPS_INO1_WRITTEN flag is set, ensuring data integrity by conservatively retaining reflink flags until safe to clear. Users should apply the updated Linux kernel versions containing this fix to prevent data corruption issues related to this vulnerability.
Description
A vulnerability in the Linux kernel's XFS filesystem reflink flag handling has been fixed. The issue involves incorrect clearing of the reflink inode flag during exchange of file ranges when the XFS_EXCHMAPS_INO1_WRITTEN flag is set. This can lead to data corruption due to writes bypassing copy-on-write protections. The fix disables reflink flag exchange in this scenario, ensuring both inodes retain the flag until it can be safely cleared later.
References
- ubuntu.com/security/CVE-2026-97547 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97547 (opens in a new tab)
- git.kernel.org/stable/c/56f87ac2b9543be2be529b831666682e6df4bc40 (opens in a new tab)
- git.kernel.org/stable/c/8ae30b9a8c207f9bd03a98eda7b5d641daa79bdb (opens in a new tab)
- git.kernel.org/stable/c/fac32b9950a2aab3f8659d23b2947b8fb305c3fe (opens in a new tab)
- git.kernel.org/stable/c/a23eca88448e52eb1a81549862df7adce794fafb (opens in a new tab)