Medium [CVE-2026-89748] Linux kernel: Ring buffer corruption in tracing due to retry exhaustion
This medium-severity Red Hat Linux advisory covers CVE-2026-89748.
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Summary
A flaw was found in the Linux kernel's tracing subsystem. An issue in the `simple_ring_buffer_swap_reader_page()` function, related to retry exhaustion during ring buffer reader page swaps, can lead to incorrect handling of successful or failed operations.
This can result in corruption of the ring buffer, potentially causing system instability or denial of service. Red Hat severity: Moderate — CVSS 6.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H).
Weakness: CWE-787.
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 27 minutes 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 27 minutes 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 27 minutes ago·verify at source
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