Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/edid: In connector_bad_edid() cap num_of_ext by num_blocks read In commit e11f5bd8228f ("drm: Add support for DP 1.4 Compliance edid corruption test") the function connector_bad_edid() started assuming that the memory for the EDID passed to it was big enough to hold `edid[0x7e] + 1` blocks of data (1 extra for the base block). It completely ignored the fact that the function was passed `num_blocks` which indicated how much memory had been allocated for the EDID. Let's fix this by adding a bounds check. This is important for handling the case where there's an error in the first block of the EDID. In that case we will call connector_bad_edid() without having re-allocated memory based on `edid[0x7e]`.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e11f5bd8228fc3760c221f940b9f6365dbf3e7ed before a7b45024f66f9ec769e8dbb1a51ae83cd05929c7; affected e11f5bd8228fc3760c221f940b9f6365dbf3e7ed before 09f3946bb452918dbfb1982add56f9ffaae393dc; affected e11f5bd8228fc3760c221f940b9f6365dbf3e7ed before 97794170b696856483f74b47bfb6049780d2d3a0 |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.75 through 5.10.*; unaffected 5.14.14 through 5.14.*; unaffected 5.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a7b45024f66f9ec769e8dbb1a51ae83cd05929c7
- https://git.kernel.org/stable/c/09f3946bb452918dbfb1982add56f9ffaae393dc
- https://git.kernel.org/stable/c/97794170b696856483f74b47bfb6049780d2d3a0
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.