Advisory [CVE-2026-53312] Remove overflows on the invalidation path
This security Red Hat Linux advisory covers CVE-2026-53312.
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Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/riscv: Remove overflows on the invalidation path Since RISC-V supports a sign extended page table it should support a gather->end of ULONG_MAX, but if this happens it will infinite loop because of the overflow.
Also avoid overflow computing the length by moving the +1 to the other side of the < A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) component for RISC-V architectures. This vulnerability could allow a local attacker to cause a Denial of Service (DoS) by triggering the overflow condition.
Red Hat severity: not rated. Weakness: CWE-190.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 8 days ago·verify at source
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