5.5

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

Modified
AliasesUBUNTU-CVE-2025-71077DEBIAN-CVE-2025-71077
Published 13-01-2026Last modified 19-10-2026

Vulnerability summary

CVE-2025-71077 is a medium (CVSS 5.5) Improper Input Validation vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 46 · Related 42
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0017MGASA-2026-0018

Timeline

  1. 13-01-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.14% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu152 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-110.110 | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1052.55 | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < 8ceee7288152bc121a6bf92997261838c78bfe06 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < 275c686f1e3cc056ec66c764489ec1fe1e51b950 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < ceb70d31da5671d298bad94ae6c20e4bbb800f96 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < d88481653d74d622d1d0d2c9bad845fc2cc6fd23 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < b69492161c056d36789aee42a87a33c18c8ed5e1 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < 858344bc9210bea9ab2bdc7e9e331ba84c164e50 | ≥ bcfff8384f6c4e6627676ef07ccad9cfacd67849, < faf07e611dfa464b201223a7253e9dc5ee0f3c9e | 5.1
  • linux_kernel≥ 5.1.1, < 5.10.248 | ≥ 5.11, < 5.15.198 | ≥ 5.16, < 6.1.160 | ≥ 6.2, < 6.6.120 | ≥ 6.7, < 6.12.64 | ≥ 6.13, < 6.18.3 | 5.1 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6 | 6.19:rc7 | 6.19:rc8
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.3-1

3 vendors · 155 products

References

42 links
Show all 42 references