What’s Vulnerable › Vulnerabilities

CVE-2025-71077: tpm: Cap the number of PCR banks

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-13 · updated 2026-10-19
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: tpm: Cap the number of PCR banks tpm2_get_pcr_allocation() does not cap any upper limit for the number of banks. Cap the limit to eight banks so that out of bounds values coming from external I/O cause on only limited harm.

Affected products

• Linux kernel: from 5.1.1 before 5.10.248; from 5.11 before 5.15.198; from 5.16 before 6.1.160; from 6.2 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.3 — fixed in 5.10.248, 5.15.198, 6.1.160, 6.12.64, 6.18.3, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 5.10.248, 5.15.198, 6.1.160, 6.12.64. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/275c686f1e3cc056ec66c764489ec1fe1e51b950
• https://git.kernel.org/stable/c/858344bc9210bea9ab2bdc7e9e331ba84c164e50
• https://git.kernel.org/stable/c/8ceee7288152bc121a6bf92997261838c78bfe06
• https://git.kernel.org/stable/c/b69492161c056d36789aee42a87a33c18c8ed5e1
• https://git.kernel.org/stable/c/ceb70d31da5671d298bad94ae6c20e4bbb800f96
• https://git.kernel.org/stable/c/d88481653d74d622d1d0d2c9bad845fc2cc6fd23
• https://git.kernel.org/stable/c/faf07e611dfa464b201223a7253e9dc5ee0f3c9e

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