CVE-2026-31759
CVE-2026-31759 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-415.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26572
- Weakness: CWE-415
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: usb: ulpi: fix double free in ulpi_register_interface() error path When device_register() fails, ulpi_register() calls put_device() on ulpi->dev. The device release callback ulpi_dev_release() drops the OF node reference and frees ulpi, but the current error path in ulpi_register_interface() then calls kfree(ulpi) again, causing a double free. Let put_device() handle the cleanup through ulpi_dev_release() and avoid freeing ulpi again in ulpi_register_interface().
Frequently asked questions
- What is CVE-2026-31759?
- In the Linux kernel, the following vulnerability has been resolved: usb: ulpi: fix double free in ulpi_register_interface() error path When device_register() fails, ulpi_register() calls put_device() on ulpi->dev. The device release callback ulpi_dev_release() drops the OF node reference and frees ulpi, but the current error path in ulpi_register_interface() then calls kfree(ulpi) again, causing a double free. Let put_device() handle the cleanup through ulpi_dev_release() and avoid freeing ulpi again in ulpi_register_interface().
- How severe is CVE-2026-31759?
- CVE-2026-31759 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-31759 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-31759?
- CVE-2026-31759 primarily affects Linux Linux Kernel. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-31759?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-31759 have an EU (EUVD) identifier?
- Yes. CVE-2026-31759 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26572.
- When was CVE-2026-31759 published?
- CVE-2026-31759 was published on 2026-05-01 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/01af542392b5d41fd659d487015a71f627accce3
- https://git.kernel.org/stable/c/272a9b26c336a295e4e209157fed809706c1b1f7
- https://git.kernel.org/stable/c/2f70ba9dae13a190673cc3f9b4aad52179738f60
- https://git.kernel.org/stable/c/38c28fe25611099230f0965c925499bfcf46a795
- https://git.kernel.org/stable/c/8763f8317bb389aded32a32b08f6751cfff657d2
- https://git.kernel.org/stable/c/a6e5461f076c2ef63159f18e5cdbd30b50f0bc15
- https://git.kernel.org/stable/c/aaeae6533d77e6ed4def85baec01e2815ebbef61
- https://git.kernel.org/stable/c/ee248e6e941e4f2e634df2bd43e5f1ef810ab6df
Affected products (7)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
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