| Name | CVE-2021-34693 |
| Description | net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because parts of a data structure are uninitialized. |
| 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-2713-1, DLA-2714-1, DSA-4941-1, ELA-463-1 |
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 | fixed | |
| stretch (lts), stretch | 4.9.320-3 | fixed | |
| 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) | stretch (security) | 4.19.232-1~deb9u1 | fixed |
| stretch (lts), stretch | 4.19.316-1~deb9u1 | fixed | |
| linux-4.9 (PTS) | jessie, jessie (lts) | 4.9.303-1~deb8u3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | jessie | (unfixed) | end-of-life | ||
| linux | source | stretch | 4.9.272-2 | DLA-2713-1 | ||
| linux | source | buster | 4.19.194-3 | DSA-4941-1 | ||
| linux | source | (unstable) | 5.10.46-1 | |||
| linux-4.19 | source | stretch | 4.19.194-3~deb9u1 | DLA-2714-1 | ||
| linux-4.9 | source | jessie | 4.9.272-2~deb8u1 | ELA-463-1 |
https://www.openwall.com/lists/oss-security/2021/06/15/1
https://github.com/nrb547/kernel-exploitation/tree/main/cve-2021-34693
https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076@3c-app-gmx-bs04/T/