5.5

CVE-2025-38391: usb: typec: altmodes/displayport: do not index invalid pin_assignments

Analyzed
AliasesUBUNTU-CVE-2025-38391DEBIAN-CVE-2025-38391
Published 25-07-2025Last modified 11-05-2026

Vulnerability summary

CVE-2025-38391 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11% 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
0.21%
0%100%
Low · +0.03 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 53 · Related 48
DLA-4327-1DLA-4328-1DSA-5973-1MGASA-2025-0218MGASA-2025-0219OPENSUSE-SU-2025:20081-1

Timeline

  1. 25-07-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: do not index invalid pin_assignments A poorly implemented DisplayPort Alt Mode port partner can indicate that its pin assignment capabilities are greater than the maximum value, DP_PIN_ASSIGN_F. In this case, calls to pin_assignment_show will cause a BRK exception due to an out of bounds array access. Prevent for loop in pin_assignment_show from accessing invalid values in pin_assignments by adding DP_PIN_ASSIGN_MAX value in typec_dp.h and using i < DP_PIN_ASSIGN_MAX as a loop condition.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.18% 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.

Ubuntu142 products
  • linuxAll versions (No fix recorded) | < 5.15.0-156.166 | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1092.99 | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
Linux2 products
  • linux≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < c93bc959788ed9a1af7df57cb539837bdf790cee | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 114a977e0f6bf278e05eade055e13fc271f69cf7 | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 621d5a3ef0231ab242f2d31eecec40c38ca609c5 | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 2f535517b5611b7221ed478527e4b58e29536ddf | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 45e9444b3b97eaf51a5024f1fea92f44f39b50c6 | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 5581e694d3a1c2f32c5a51d745c55b107644e1f8 | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < 47cb5d26f61d80c805d7de4106451153779297a1 | ≥ 0e3bb7d6894d9b6e67d6382bb03a46a1dc989588, < af4db5a35a4ef7a68046883bfd12468007db38f1 | 4.19
  • linux_kernel≥ 4.19, < 5.4.296 | ≥ 5.5, < 5.10.240 | ≥ 5.11, < 5.15.187 | ≥ 5.16, < 6.1.144 | ≥ 6.2, < 6.6.97 | ≥ 6.7, < 6.12.37 | ≥ 6.13, < 6.15.6 | 6.16:rc1 | 6.16:rc2 | 6.16:rc3 | 6.16:rc4

3 vendors · 146 products

References

46 links
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