High [CVE-2026-53202] Fix signed integer truncation in IPC receive
This high-severity Red Hat Linux advisory covers CVE-2026-53202 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
In the Linux kernel, the following vulnerability has been resolved: accel/ivpu: Fix signed integer truncation in IPC receive Fix potential buffer overflow where firmware-supplied data_size is cast to signed int before being used in min_t().
Large unsigned values (>= 0x80000000) become negative, causing unsigned wraparound and oversized memcpy operations that can overflow the stack buffer. Change min_t(int,...) to min() as both values are unsigned and can be handled by min() without explicit cast.
A local attacker could exploit a signed integer truncation vulnerability in the Inter-Process Communication (IPC) receive path. This flaw occurs when a firmware-supplied data size is incorrectly converted, leading to an oversized memory copy operation that can overflow a kernel stack buffer.
Successful exploitation could result in a denial of service through a kernel crash and potentially lead to privilege escalation. Red Hat severity: Moderate — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9.
Red Hat fixing advisory: RHSA-2026:54343, RHSA-2026:54443.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 21 days ago·verify at source
- kernel-0:6.12.0-211.47.1.el10_2
- kernel-0:5.14.0-687.39.1.el9_8
- RHSA-2026:54343
- RHSA-2026:54443
Official advisory · high-confidence parse· fetched 21 days ago·verify at source
Mitigation checklist
- If the Intel Versatile Processing Unit (IVPU) accelerator is not required, the `ivpu` kernel module can be blacklisted to prevent it from loading, thereby mitigating this vulnerability. To blacklist the module, create a file named `/etc/modprobe.d/blacklist-ivpu.conf` with the following content: ``` blacklist ivpu ``` After creating the file, regenerate the initramfs and reboot the system for the changes to take effect. This may impact functionality if the IVPU accelerator is actively used.
Official advisory · high-confidence parse· fetched 21 days ago·verify at source
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