CVE-2025-68264: Linux kernel · ext4: refresh inline data size before write operations
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ca43ea29b4c4d2764aec8a26cffcfb677a871e6e : patch Linux kernel soon.
Data as of 10 Nov 2026, 15:02 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-06-16.
- Patch
- Available – fixed in ca43ea29b4c4d2764aec8a26cffcfb677a871e6e, 1687a055a555347b002f406676a1aaae4668f242, 892e1cf17555735e9d021ab036c36bc7b58b0e3b +5
Exploitation evidence
Disclosed: evidence found.
CVE published 16 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 10 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
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
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in specific Linux kernel commits. Users should update to a kernel version that includes these fixes to prevent the race condition and associated kernel crashes. No additional mitigation is required beyond applying the official patch.
Description
CVE-2025-68264 is a race condition vulnerability in the Linux kernel's ext4 filesystem related to inline data size caching. The cached inline data size can become stale due to concurrent extended attribute (xattr) modifications, causing ext4 write operations to use outdated capacity values. This leads to a kernel BUG_ON() crash during inline data writes. The issue is fixed by recalculating the inline data size after acquiring the xattr semaphore to ensure consistency.
References
- git.kernel.org/stable/c/54ab81ae5f218452e64470cd8a8139bb5880fe2b (opens in a new tab)
- git.kernel.org/stable/c/43bf001f0fe4e59bba47c897505222f959f4a1cc (opens in a new tab)
- git.kernel.org/stable/c/89c2c41f0974e530b2d032c3695095aa0559adb1 (opens in a new tab)
- git.kernel.org/stable/c/1687a055a555347b002f406676a1aaae4668f242 (opens in a new tab)
- git.kernel.org/stable/c/210ac60a86a3ad2c76ae60e0dc71c34af6e7ea0b (opens in a new tab)
- git.kernel.org/stable/c/ca43ea29b4c4d2764aec8a26cffcfb677a871e6e (opens in a new tab)
- git.kernel.org/stable/c/58df743faf21ceb1880f930aa5dd428e2a5e415d (opens in a new tab)
- git.kernel.org/stable/c/892e1cf17555735e9d021ab036c36bc7b58b0e3b (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)