Vulnerability · Published Jun 14, 2021 · Assigned by mitre
CVE-2021-34693
Medium 5.5
In plain English
A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.5%top 59.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.46-1 | DEBIAN-CVE-2021-34693 |
| Debian:13 | linux | 5.10.46-1 | DEBIAN-CVE-2021-34693 |
| Debian:14 | linux | 5.10.46-1 | DEBIAN-CVE-2021-34693 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2021-34693 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2021-34693 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2021-34693 |
Affected products (as reported)
References
- https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/
- [oss-security] 20210615 CVE-2021-34693: Infoleak in CAN BCM protocol in Linux kernel mailing-list
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update mailing-list
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update mailing-list
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update mailing-list
- DSA-4941 vendor-advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc