5.5

CVE-2025-39807: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-39807DEBIAN-CVE-2025-39807
Published 16-09-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2025-39807 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 18
DSA-6008-1OPENSUSE-SU-2025:20081-1SUSE-SU-2025:03601-1SUSE-SU-2025:03633-1SUSE-SU-2025:21074-1SUSE-SU-2025:21139-1

Timeline

  1. 16-09-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add error handling for old state CRTC in atomic_disable Introduce error handling to address an issue where, after a hotplug event, the cursor continues to update. This situation can lead to a kernel panic due to accessing the NULL `old_state->crtc`. E,g. Unable to handle kernel NULL pointer dereference at virtual address Call trace: mtk_crtc_plane_disable+0x24/0x140 mtk_plane_atomic_update+0x8c/0xa8 drm_atomic_helper_commit_planes+0x114/0x2c8 drm_atomic_helper_commit_tail_rpm+0x4c/0x158 commit_tail+0xa0/0x168 drm_atomic_helper_commit+0x110/0x120 drm_atomic_commit+0x8c/0xe0 drm_atomic_helper_update_plane+0xd4/0x128 __setplane_atomic+0xcc/0x110 drm_mode_cursor_common+0x250/0x440 drm_mode_cursor_ioctl+0x44/0x70 drm_ioctl+0x264/0x5d8 __arm64_sys_ioctl+0xd8/0x510 invoke_syscall+0x6c/0xe0 do_el0_svc+0x68/0xe8 el0_svc+0x34/0x60 el0t_64_sync_handler+0x1c/0xf8 el0t_64_sync+0x180/0x188 Adding NULL pointer checks to ensure stability by preventing operations on an invalid CRTC state.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu107 products
  • linux< 6.8.0-106.106
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1050.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 40b5b4ba8ed87c0bfb6268c10589777652ebde4c, < 7d5cc22efa44e0fe321ce195c71c3d7da211fbb2 | ≥ d208261e9f7c66960587b10473081dc1cecbe50b, < 9a94e9d8b50bcfe89693bc899a54d3866d86e973 | ≥ d208261e9f7c66960587b10473081dc1cecbe50b, < 0c6b24d70da21201ed009a2aca740d2dfddc7ab5 | a9c482689051ca96f4a4630fe49fd6919694caaa | ≥ 6.12.40, < 6.12.45 | ≥ 6.15.8, < 6.16 | 6.16
  • linux_kernelEOL≥ 6.12.40, < 6.12.45 | ≥ 6.15.8, < 6.16 | ≥ 6.16.1, < 6.16.5 | 6.16 | 6.16:rc7 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3
Debian1 product
  • linux< 6.12.48-1 | < 6.16.5-1

3 vendors · 110 products

References

17 links
Show all 17 references