Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/dp: Fix OOB read when handling Post Cursor2 register The link_status array was not large enough to read the Adjust Request Post Cursor2 register, so remove the common helper function to avoid an OOB read, found with a -Warray-bounds build: drivers/gpu/drm/drm_dp_helper.c: In function 'drm_dp_get_adjust_request_post_cursor': drivers/gpu/drm/drm_dp_helper.c:59:27: error: array subscript 10 is outside array bounds of 'const u8[6]' {aka 'const unsigned char[6]'} [-Werror=array-bounds] 59 | return link_status[r - DP_LANE0_1_STATUS]; | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/drm_dp_helper.c:147:51: note: while referencing 'link_status' 147 | u8 drm_dp_get_adjust_request_post_cursor(const u8 link_status[DP_LINK_STATUS_SIZE], | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Replace the only user of the helper with an open-coded fetch and decode, similar to drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.5, < 5.17.2 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/a2151490cc6c57b368d7974ffd447a8b36ade639Patch
- https://git.kernel.org/stable/c/aeaed9a9fe694f8b1462fb81e2d33298c929180bPatch
FAQ
What is CVE-2022-49218?
CVE-2022-49218 is a vulnerability with a CVSS score of 7.1 (HIGH). In the Linux kernel, the following vulnerability has been resolved: drm/dp: Fix OOB read when handling Post Cursor2 register The link_status array was not large enough to read the Adjust Request Pos...
How severe is CVE-2022-49218?
CVE-2022-49218 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49218?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.