CVE-2026-97547: Linux kernel · xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in fac32b9950a2aab3f8659d23b2947b8fb305c3fe : patch Linux kernel soon.
Data as of 26 Oct 2026, 17:16 UTC
Rated High by Threat Radar's AI analysis · 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.
- Patch
- Available – fixed in fac32b9950a2aab3f8659d23b2947b8fb305c3fe, a23eca88448e52eb1a81549862df7adce794fafb, 56f87ac2b9543be2be529b831666682e6df4bc40 +1
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
Upgrade Linux kernel to fac32b9950a2aab3f8659d23b2947b8fb305c3fe, a23eca88448e52eb1a81549862df7adce794fafb, 56f87ac2b9543be2be529b831666682e6df4bc40 or 8ae30b9a8c207f9bd03a98eda7b5d641daa79bdb.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a patched kernel version that includes the fix identified by commits fac32b9950a2aab3f8659d23b2947b8fb305c3fe, a23eca88448e52eb1a81549862df7adce794fafb, 56f87ac2b9543be2be529b831666682e6df4bc40, or 8ae30b9a8c207f9bd03a98eda7b5d641daa79bdb. No additional mitigation is required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's XFS filesystem affects the exchange of reflink flags during full-file range exchanges. The flaw occurs when the XFS_EXCHMAPS_INO1_WRITTEN flag is set, causing the reflink inode flag to be incorrectly cleared from an inode that still owns shared written extents. This can lead to data corruption between reflink-related files due to improper write handling. The issue is fixed by disabling reflink flag exchange when this flag is set, ensuring both inodes retain the reflink flag until it can be safely cleared.
References
- git.kernel.org/stable/c/56f87ac2b9543be2be529b831666682e6df4bc40 (opens in a new tab)
- git.kernel.org/stable/c/fac32b9950a2aab3f8659d23b2947b8fb305c3fe (opens in a new tab)
- git.kernel.org/stable/c/8ae30b9a8c207f9bd03a98eda7b5d641daa79bdb (opens in a new tab)
- git.kernel.org/stable/c/a23eca88448e52eb1a81549862df7adce794fafb (opens in a new tab)