CVE-2024-43873: vhost/vsock: always initialize seqpacket_allow
Vulnerability summary
CVE-2024-43873 is a high (CVSS 7.8) Missing Initialization of Resource vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.3% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 22 · Related 18Timeline
- 21-08-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: vhost/vsock: always initialize seqpacket_allow There are two issues around seqpacket_allow: 1. seqpacket_allow is not initialized when socket is created. Thus if features are never set, it will be read uninitialized. 2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared, then seqpacket_allow will not be cleared appropriately (existing apps I know about don't usually do this but it's legal and there's no way to be sure no one relies on this). To fix: - initialize seqpacket_allow after allocation - set it unconditionally in set_features
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
12%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.22% 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.
Ubuntu117 products
- linux< 5.15.0-125.135 | < 6.8.0-50.51
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1072.78 | < 6.8.0-1020.22
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ ced7b713711fdd8f99d8d04dc53451441d194c60, < ea558f10fb05a6503c6e655a1b7d81fdf8e5924c | ≥ ced7b713711fdd8f99d8d04dc53451441d194c60, < 3062cb100787a9ddf45de30004b962035cd497fb | ≥ ced7b713711fdd8f99d8d04dc53451441d194c60, < 30bd4593669443ac58515e23557dc8cef70d8582 | ≥ ced7b713711fdd8f99d8d04dc53451441d194c60, < eab96e8716cbfc2834b54f71cc9501ad4eec963b | ≥ ced7b713711fdd8f99d8d04dc53451441d194c60, < 1e1fdcbdde3b7663e5d8faeb2245b9b151417d22 | 5.14
- linux_kernel≥ 5.14, < 5.15.165 | ≥ 5.16, < 6.1.103 | ≥ 6.2, < 6.6.44 | ≥ 6.7, < 6.10.3
Debian1 product
- linux< 6.1.106-1 | < 6.10.3-1
3 vendors · 120 products
