Medium [CVE-2026-80985] Linux kernel: Information disclosure and data corruption in SMC-Rv2 LLC message handling
This medium-severity Red Hat Linux advisory covers CVE-2026-80985.
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Summary
A flaw was found in the Linux kernel's Server Message Block over Remote Direct Memory Access (SMC-Rv2) protocol implementation. The `smc_llc_rmt_delete_rkey()` and `smc_llc_save_add_link_rkeys()` functions incorrectly handle oversized LLC messages, reading beyond the intended message boundaries.
This can lead to the processing of stale or unintended data from previous messages, potentially resulting in information disclosure or data corruption. A remote attacker could exploit this vulnerability to gain access to sensitive information or cause system instability.
Red Hat severity: Moderate — CVSS 5.7 (CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H). Weakness: CWE-125.
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 21 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 21 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 21 minutes ago·verify at source
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