CVE-2023-52493: bus: mhi: host: Drop chan lock before queuing buffers
Vulnerability summary
CVE-2023-52493 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% 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 16 · Related 17Timeline
- 29-02-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: bus: mhi: host: Drop chan lock before queuing buffers Ensure read and write locks for the channel are not taken in succession by dropping the read lock from parse_xfer_event() such that a callback given to client can potentially queue buffers and acquire the write lock in that process. Any queueing of buffers should be done without channel read lock acquired as it can result in multiple locks and a soft lockup. [mani: added fixes tag and cc'ed stable]
CVSS metrics
4 scores · 3 sources · 2 versions- 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
11%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.21% 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.
Ubuntu104 products
- linux< 5.15.0-106.116
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1061.67
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < 20a6dea2d1c68d4e03c6bb50bc12e72e226b5c0e | ≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < 6e4c84316e2b70709f0d00c33ba3358d9fc8eece | ≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < 3c5ec66b4b3f6816f3a6161538672e389e537690 | ≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < eaefb9464031215d63c0a8a7e2bfaa00736aa17e | ≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < b8eff20d87092e14cac976d057cb0aea2f1d0830 | ≥ 1d3173a3bae7039b765a0956e3e4bf846dbaacb8, < 01bd694ac2f682fb8017e16148b928482bc8fa4b | 5.7
- linux_kernel≥ 5.7, < 5.10.210 | ≥ 5.11, < 5.15.149 | ≥ 5.16, < 6.1.76 | ≥ 6.2, < 6.6.15 | ≥ 6.7, < 6.7.3
Debian1 product
- linux< 6.1.76-1 | < 6.6.15-1
3 vendors · 107 products
