CVE-2025-38135: debian debian_linux NULL Pointer Dereference
Vulnerability summary
CVE-2025-38135 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 53 · Related 48Timeline
- 03-07-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: serial: Fix potential null-ptr-deref in mlb_usio_probe() devm_ioremap() can return NULL on error. Currently, mlb_usio_probe() does not check for this case, which could result in a NULL pointer dereference. Add NULL check after devm_ioremap() to prevent this issue.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
+0.03 pp
From 0.18% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu141 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
- linux< 6.1.147-1 | < 6.12.35-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < a05ebe384c7ca75476453f3070c67d9cf1d1a89f | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < 81159a6b064142b993f2f39828b77e199c77872a | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < 19fd9f5a69363d33079097d866eb6082d61bf31d | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < 548b0e81b9a0902a8bc8259430ed965663baadfc | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < a6c7c365734cd0fa1c5aa225a6294fdf80cad2ea | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < c23d87b43f7dba5eb12820f6cf21a1cd4f63eb3d | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < e1b144aebe6fb898d96ced8c990d7aa38fda4a7a | ≥ ba44dc04300441b47618f9933bf36e75a280e5fe, < 86bcae88c9209e334b2f8c252f4cc66beb261886 | 5.2
- linux_kernel≥ 5.2, < 5.4.295 | ≥ 5.5, < 5.10.239 | ≥ 5.11, < 5.15.186 | ≥ 5.16, < 6.1.142 | ≥ 6.2, < 6.6.94 | ≥ 6.7, < 6.12.34 | ≥ 6.13, < 6.15.3
3 vendors · 145 products
References
47 links- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory