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CVE-2021-34693
net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from kernel stack memory because…
Medium5.5EPSS 0.47%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Timeline
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.47% · top 59% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
n/a
- affected n/a
References (7)
- https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/ (opens in a new tab)x_transferred
- [oss-security] 20210615 CVE-2021-34693: Infoleak in CAN BCM protocol in Linux kernel (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update (opens in a new tab)mailing-listx_transferred
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update (opens in a new tab)mailing-listx_transferred
- DSA-4941 (opens in a new tab)vendor-advisoryx_transferred
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8ecc (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-34693)Record last updated .