| Name | CVE-2022-39842 |
| Description | An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c, the count parameter has a type conflict of size_t versus int, causing an integer overflow and bypassing the size check. After that, because it is used as the third argument to copy_from_user(), a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen. |
| 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-3131-1, DLA-3173-1, DSA-5257-1, ELA-696-1, ELA-723-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | vulnerable |
| stretch (security) | 4.9.320-2 | vulnerable | |
| stretch (lts), stretch | 4.9.320-3 | vulnerable | |
| buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
| bullseye | 5.10.223-1 | fixed | |
| bullseye (security) | 5.10.226-1 | fixed | |
| bookworm | 6.1.115-1 | fixed | |
| bookworm (security) | 6.1.119-1 | fixed | |
| trixie | 6.12.5-1 | fixed | |
| sid | 6.12.6-1 | fixed | |
| linux-4.19 (PTS) | jessie, jessie (lts) | 4.19.316-1~deb8u1 | fixed |
| stretch (security) | 4.19.232-1~deb9u1 | vulnerable | |
| stretch (lts), stretch | 4.19.316-1~deb9u1 | fixed | |
| linux-5.10 (PTS) | stretch (lts), stretch | 5.10.226-1~deb9u1 | fixed |
| buster, buster (lts) | 5.10.226-1~deb10u1 | fixed | |
| buster (security) | 5.10.218-1~deb10u1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | buster | 4.19.260-1 | DLA-3131-1 | ||
| linux | source | bullseye | 5.10.149-1 | DSA-5257-1 | ||
| linux | source | (unstable) | 5.19.6-1 | unimportant | ||
| linux-4.19 | source | jessie | 4.19.260-1~deb8u1 | ELA-696-1 | ||
| linux-4.19 | source | stretch | 4.19.260-1~deb9u1 | ELA-696-1 | ||
| linux-5.10 | source | stretch | 5.10.149-2~deb9u1 | ELA-723-1 | ||
| linux-5.10 | source | buster | 5.10.149-2~deb10u1 | DLA-3173-1 |
https://git.kernel.org/linus/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 (5.19-rc4)
Driver not enabled in Debian configs