CVE-2026-98155 accel/qaic: Address potential out-of-bounds read in resp_worker()
A malformed wire message can cause an out-of-bounds read in the Linux kernel QAIC driver, leading to kernel panics or information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98155?
CVE-2026-98155 is a high-severity memory corruption vulnerability in Linux kernel, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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().
Weakness: CWE-125
Which versions are affected by CVE-2026-98155?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98155?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-98155 being exploited?
There is no known exploitation of CVE-2026-98155 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-104799, BELL-CVE-2026-98155, DEBIAN-CVE-2026-98155, GHSA-fp97-66mw-5q4h, UBUNTU-CVE-2026-98155.