CVE-2024-35840: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish_connect()
Vulnerability summary
CVE-2024-35840 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.4% 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 22 · Related 23Timeline
- 17-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish_connect() subflow_finish_connect() uses four fields (backup, join_id, thmac, none) that may contain garbage unless OPTION_MPTCP_MPJ_SYNACK has been set in mptcp_parse_option()
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
0.22%
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 causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu104 products
- linux< 5.15.0-102.112
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1057.63
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ f296234c98a8fcec94eec80304a873f635d350ea, < 413b913507326972135d2977975dbff8b7f2c453 | ≥ f296234c98a8fcec94eec80304a873f635d350ea, < 51e4cb032d49ce094605f27e45eabebc0408893c | ≥ f296234c98a8fcec94eec80304a873f635d350ea, < ad3e8f5c3d5c53841046ef7a947c04ad45a20721 | ≥ f296234c98a8fcec94eec80304a873f635d350ea, < 76e8de7273a22a00d27e9b8b7d4d043d6433416a | ≥ f296234c98a8fcec94eec80304a873f635d350ea, < be1d9d9d38da922bd4beeec5b6dd821ff5a1dfeb | 5.7
- linux_kernel≥ 5.7, < 5.15.148 | ≥ 5.16, < 6.1.75 | ≥ 6.2, < 6.6.14 | ≥ 6.7, < 6.7.2
Debian1 product
- linux< 6.1.76-1 | < 6.6.15-1
3 vendors · 107 products
