CVE-2026-63907: Linux kernel · uio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory
Source GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% 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 19 Jul 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
AI-suggested
A fix has been implemented by removing the manual kfree() calls in the affected driver code. Users should apply the official Linux kernel update that includes this fix once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory or Linux kernel mailing lists for the official patch and update guidance.
Description
A double free vulnerability was identified and resolved in the Linux kernel's uio_pci_generic_sva driver. The issue involved improper manual freeing of memory allocated with devm_kzalloc(), which is already managed by the device resource management system. This could lead to a double free when the driver probe fails or during device removal. The fix removes the redundant manual kfree() calls to prevent this condition.