CVE-2022-49221 drm/msm/dp: populate connector of struct dp_panel

What is CVE-2022-49221?

CVE-2022-49221 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

drm/msm/dp: populate connector of struct dp_panel

DP CTS test case 4.2.2.6 has valid edid with bad checksum on purpose and expect DP source return correct checksum. During drm edid read, correct edid checksum is calculated and stored at connector::real_edid_checksum.

The problem is struct dp_panel::connector never be assigned, instead the connector is stored in struct msm_dp::connector. When we run compliance testing test case 4.2.2.6 dp_panel_handle_sink_request() won't have a valid edid set in struct dp_panel::edid so we'll try to use the connectors real_edid_checksum and hit a NULL pointer dereference error because the connector pointer is never assigned.

Changes in V2: -- populate panel connector at msm_dp_modeset_init() instead of at dp_panel_read_sink_caps()

Changes in V3: -- remove unhelpful kernel crash trace commit text -- remove renaming dp_display parameter to dp

Changes in V4: -- add more details to commit text

Changes in v10: -- group into one series

Changes in v11: -- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read

Signee-off-by: Kuogee Hsieh <[email protected]>

Weakness: CWE-476

Which versions are affected by CVE-2022-49221?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49221?

Apply the vendor's patch.

Is CVE-2022-49221 being exploited?

There is no known exploitation of CVE-2022-49221 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-49221, GHSA-x2p6-2vrh-8v9r, UBUNTU-CVE-2022-49221.