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CVE-2026-89888

HIGHCVSS 7.8/10

Last modified

CVE-2026-89888 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov02a10: fix endpoint parsing use-after-free The ov02a10_check_hwcfg() function calls fwnode_handle_put(ep) immediately after allocating and parsing the endpoint. However, it subsequently calls fwnode_property_read_u32() using the same 'ep' handle, leading to a potential use-after-free. Additionally, reading the optional 'ovti,mipi-clock-voltage' property used to overwrite the 'ret' variable.

Description

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov02a10: fix endpoint parsing use-after-free The ov02a10_check_hwcfg() function calls fwnode_handle_put(ep) immediately after allocating and parsing the endpoint. However, it subsequently calls fwnode_property_read_u32() using the same 'ep' handle, leading to a potential use-after-free. Additionally, reading the optional 'ovti,mipi-clock-voltage' property used to overwrite the 'ret' variable. If the property was missing, 'ret' would become negative, and this failure code would be incorrectly returned at the end of the function, causing probe to fail entirely. Fix the use-after-free by moving fwnode_property_read_u32() before the endpoint is parsed and freed. Avoid the error leak by not assigning the result of fwnode_property_read_u32() to 'ret'.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 91807efbe8ec7f591085067d9f96a112e015274b, < 9de48ba68f56de9fe20ebd3f9728d22af25f9a91; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 8ddb3b69f67b0632ff3830da18de3e8dcaf5884b; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 4c2988bf1ad2753240a38db10ce23e87ec542f8f; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 213b2489130357c8d3e8d4fb2bdab88791ce3185; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 90f9b421fc6d4f2edab7521efdb1e58571468d33; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 6e13784452785cd8402b228bea53bc6a027ade84; >= 91807efbe8ec7f591085067d9f96a112e015274b, < 94971ba0592ca77ec99b292226a4b398763315b8
LinuxLinux5.11

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89888?
In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov02a10: fix endpoint parsing use-after-free The ov02a10_check_hwcfg() function calls fwnode_handle_put(ep) immediately after allocating and parsing the endpoint. However, it subsequently calls fwnode_property_read_u32() using the same 'ep' handle, leading to a potential use-after-free. Additionally, reading the optional 'ovti,mipi-clock-voltage' property used to overwrite the 'ret' variable. If the property was missing, 'ret' would become negative, and this failure code would be incorrectly returned at the end of the function, causing probe to fail entirely. Fix the use-after-free by moving fwnode_property_read_u32() before the endpoint is parsed and freed. Avoid the error leak by not assigning the result of fwnode_property_read_u32() to 'ret'.
How severe is CVE-2026-89888?
CVE-2026-89888 has a CVSS score of 7.8/10 (HIGH severity).
How do I fix CVE-2026-89888?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST