Affects the Linux kernel ACPI interpreter used broadly across distributions and VMs; can enable kernel compromise or denial of service, impacting enterprise infrastructure.
CVE-2026-97455
Use-after-free in Linux ACPI interpreter enabling kernel memory corruption.
Is CVE-2026-97455 being exploited?
Not confirmed. CVE-2026-97455 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-97455?
CVE-2026-97455 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-97455?
Yes. A fix has been recorded for CVE-2026-97455. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-97455 affect?
CVE-2026-97455 affects Linux kernel (ACPICA component), Linux distributions using ACPICA, Virtual machine guests running Linux. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-97455?
Upgrade to patched kernel, apply vendor updates and reboot affected hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local or guest attacker can trigger kernel memory corruption via crafted ACPI methods/tables, enabling privilege escalation or kernel crash (DoS).
Immediate action required
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < fe7b3d3b7490c2c0119f2d84fa33996dcbc71042
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 945e87267cfd90937b3c637f87324cbb56998b72
- affected< 6.12.111
- affected< 6.18.53
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.