SDL (Simple DirectMedia Layer) through 1.2.15 and 2.x through 2.0.9 has a heap-based buffer over-read in BlitNtoN in video/SDL_blit_N.c when called from SDL_SoftBlit in video/SDL_blit.c.
https://bugzilla.libsdl.org/show_bug.cgi?id=4538
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00030.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00093.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00094.html
https://usn.ubuntu.com/4156-1/
https://usn.ubuntu.com/4156-2/
https://access.redhat.com/errata/RHSA-2019:3951
https://access.redhat.com/errata/RHSA-2019:3950
https://usn.ubuntu.com/4238-1/
https://access.redhat.com/errata/RHSA-2020:0293
https://lists.debian.org/debian-lts-announce/2021/01/msg00024.html
https://lists.debian.org/debian-lts-announce/2021/10/msg00032.html
Source: MITRE
Published: 2019-07-16
Updated: 2021-11-30
Type: CWE-125
Base Score: 5.8
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P
Impact Score: 4.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Impact Score: 5.2
Exploitability Score: 2.8
Severity: HIGH