CVE-2025-38240: linux NULL Pointer Dereference
Vulnerability summary
CVE-2025-38240 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 30 · Related 28Timeline
- 18-04-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted(). While touching these prints, also add the error code to them to make future debugging easier.
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
0.26%
Chance of exploitation in the next 30 days
Percentile
17%
Versus all other CVEs
30-day change
0.00 pp
From 0.26% 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
Ubuntu111 products
- linux< 6.8.0-86.87
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1041.43
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 7eacba9a083be65c0f251c19380ec01147c01ebc, < 13ec849fd2eab808ee8eba2625df7ebea3b85edf | ≥ 7eacba9a083be65c0f251c19380ec01147c01ebc, < 57a9fb47551b33cde7b76d17c0072c3b394f4620 | ≥ 7eacba9a083be65c0f251c19380ec01147c01ebc, < 2fda391ef7a701748abd7fa32232981b522c1e07 | ≥ 7eacba9a083be65c0f251c19380ec01147c01ebc, < 149a5c38436c229950cf1020992ce65c9549bc19 | ≥ 7eacba9a083be65c0f251c19380ec01147c01ebc, < 106a6de46cf4887d535018185ec528ce822d6d84 | 6.6
- linux_kernel≥ 6.6, < 6.6.87 | ≥ 6.7, < 6.12.23 | ≥ 6.13, < 6.13.11 | ≥ 6.14, < 6.14.2
Debian1 product
- linux< 6.12.25-1
3 vendors · 114 products
