Bug 1976208 - kernel: out-of-bounds read in vgacon subsystem in vgacon_scrolldelta()
Summary: kernel: out-of-bounds read in vgacon subsystem in vgacon_scrolldelta()
Keywords:
Status: CLOSED DUPLICATE of bug 1880006
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1979451 1883596 1883597 1883598 1883599 1883600 1976209 1979450 1979452 1979453 1979533 1979534 1979535 1979536 1979537 1979538
Blocks: 1976210
TreeView+ depends on / blocked
 
Reported: 2021-06-25 14:16 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-20 20:15 UTC (History)
44 users (show)

Fixed In Version: kernel 5.8.10
Clone Of:
Environment:
Last Closed: 2021-07-06 17:47:22 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-06-25 14:16:11 UTC 
The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software scrollback. There is a vgacon_scrolldelta out-of-bounds read.

Reference:
https://seclists.org/oss-sec/2020/q3/176

Upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=973c096f6a85e5b5f2a295126ba6928d9a6afd45
Comment 1 Guilherme de Almeida Suckevicz 2021-06-25 14:18:24 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1976209]
Comment 2 Justin M. Forbes 2021-06-29 16:07:46 UTC 
This was fixed for Fedora with the 5.8.10 stable kernel updates.
Comment 8 Alex 2021-07-06 17:47:22 UTC 

*** This bug has been marked as a duplicate of bug 1880006 ***
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