CVE-2023-53077
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes [WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix shift-out-of-bounds in CalculateVMAndRowBytes [WHY] When PTEBufferSizeInRequests is zero, UBSAN reports the following warning because dml_log2 returns an unexpected negative value: shift exponent 4294966273 is too large for 32-bit type 'int' [HOW] In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and assign the result directly.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/031f196d1b1b6d5dfcb0533b431e3ab1750e6189Patch
- https://git.kernel.org/stable/c/7257070be70e19a9138f39009c1a26c83a8a7cfaPatch
- https://git.kernel.org/stable/c/a16394b5d661afec9a264fecac3abd87aea439eaPatch
- https://git.kernel.org/stable/c/bec1bea2fa974e63f6059c33edde669c7894d0bcPatch
- https://git.kernel.org/stable/c/e12b95680821b9880cd9992c0f3555389363604fPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.