CVE-2025-39772: drm/hisilicon/hibmc: fix the hibmc loaded failed bug
Vulnerability summary
CVE-2025-39772 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.1% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 44 · Related 41Timeline
- 11-09-2025PublishedVulnerability first disclosed.
- 12-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/hisilicon/hibmc: fix the hibmc loaded failed bug When hibmc loaded failed, the driver use hibmc_unload to free the resource, but the mutexes in mode.config are not init, which will access an NULL pointer. Just change goto statement to return, because hibnc_hw_init() doesn't need to free anything.
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
0.15%
Chance of exploitation in the next 30 days
Percentile
4%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.15% on 04-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu147 products
- linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.5-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < ddf1691f25345699296e642f0f59f2d464722fa3 | ≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < c950e1be3a24d021475b56efdb49daa7fbba63a9 | ≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < f93032e5d68f459601c701f6ab087b5feb3382e8 | ≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < a4f1b9c57092c48bdc7958abd23403ccaed437b2 | ≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < d3e774266c28aefab3e9db334fdf568f936cae04 | ≥ b3df5e65cc03696b0624a877d03a3ddf3ef43f52, < 93a08f856fcc5aaeeecad01f71bef3088588216a | 4.14
- linux_kernel≥ 4.14, < 5.15.190 | ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4 | 6.17:rc1 | 6.17:rc2
3 vendors · 151 products
References
38 links- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory