CVE-2024-35952: drm/ast: Fix soft lockup
Vulnerability summary
CVE-2024-35952 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.6% 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 18 · Related 14Timeline
- 20-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/ast: Fix soft lockup There is a while-loop in ast_dp_set_on_off() that could lead to infinite-loop. This is because the register, VGACRI-Dx, checked in this API is a scratch register actually controlled by a MCU, named DPMCU, in BMC. These scratch registers are protected by scu-lock. If suc-lock is not off, DPMCU can not update these registers and then host will have soft lockup due to never updated status. DPMCU is used to control DP and relative registers to handshake with host's VGA driver. Even the most time-consuming task, DP's link training, is less than 100ms. 200ms should be enough.
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
0.17%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.17% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot 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.
Ubuntu88 products
- linux< 6.8.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1011.12
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54, < 8a6fea3fcb577a543ef67683ca7105bde49a38fb | ≥ 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54, < a81b2acd43e24e419f65df97348c76a5a1496066 | ≥ 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54, < 35768baf0fdfc47ede42d899506bad78450e9294 | ≥ 594e9c04b5864b4b8b151ef4ba9521c59e0f5c54, < bc004f5038220b1891ef4107134ccae44be55109 | 5.19
- linux_kernel≥ 5.19, < 6.1.87 | ≥ 6.2, < 6.6.28 | ≥ 6.7, < 6.8.7 | 6.9:rc1 | 6.9:rc2 | 6.9:rc3
Debian1 product
- linux< 6.1.90-1 | < 6.8.9-1
3 vendors · 91 products
