| Name | CVE-2022-3775 |
| Description | When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3190-1, DLA-3190-2, DSA-5280-1, ELA-760-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| grub2 (PTS) | jessie, jessie (lts) | 2.02~beta2-22+deb8u2 | vulnerable |
| stretch (lts), stretch | 2.02~beta3-5+deb9u3 | fixed | |
| buster (security), buster, buster (lts) | 2.06-3~deb10u4 | fixed | |
| bullseye (security), bullseye | 2.06-3~deb11u6 | fixed | |
| bookworm (security), bookworm | 2.06-13+deb12u1 | fixed | |
| sid, trixie | 2.12-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| grub2 | source | stretch | 2.02~beta3-5+deb9u3 | ELA-760-1 | ||
| grub2 | source | buster | 2.06-3~deb10u3 | DLA-3190-2 | ||
| grub2 | source | bullseye | 2.06-3~deb11u4 | DSA-5280-1 | ||
| grub2 | source | (unstable) | 2.06-5 |
https://lists.gnu.org/archive/html/grub-devel/2022-11/msg00059.html
[jessie] - grub2 <ignored> (Newer GCC version required, patches partly applied in ELA-763-1)