Security readout for executives and security teams
This is a Linux kernel information leak in the CAN BCM networking code. A local user may receive unintended data from kernel stack memory. It does not by itself show remote compromise, but leaked kernel data can reduce defenses and support later attacks on systems where untrusted local code can run. Exposure is most relevant on Linux systems with vulnerable kernels and local untrusted users, workloads, or containers that can reach CAN BCM functionality. The supplied affected-product metadata is incomplete, so distribution-specific package impact must be confirmed from vendor advisories. Treat as a routine but real kernel hardening update. Prioritize multi-user, container-hosting, or operational-technology-adjacent Linux systems first. Emergency response is not supported by the provided evidence because exploitation is local and no active exploitation is cited. Mitigation focus: Upgrade to a vendor kernel containing the upstream fix.; Apply Debian DSA or DLA kernel updates where applicable.; Check non-Debian vendor advisories for backported fixes..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2021-34693 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://lore.kernel.org/netdev/trinity-87eaea25-2a7d-4aa9-92a5-269b822e5d95-1623609211076%403c-app-gmx-bs04/T/CVE reference
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security updateCVE reference · mailing-list
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security updateCVE reference · mailing-list
- [debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security updateCVE reference · mailing-list
- DSA-4941CVE reference · vendor-advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5e87ddbe3942e27e939bdc02deb8579b0cbd8eccCVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.