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CVE-2024-35840

17
FAUCET Score

CVE-2024-35840 addresses a vulnerability in the Linux kernel's Multipath TCP (MPTCP) implementation, specifically within the subflow_finish_connect() function. This medium-severity vulnerability (CVSS 5.5) could lead to a denial of service (A:H) due to the use of uninitialized fields if the OPTION_MPTCP_MPJ_SYNACK flag is not properly set. The attack vector is local (AV:L) with low attack complexity (AC:L) and requires low privileges (PR:L). There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.7, < 5.15.148CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.75CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.6.14CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.7, < 6.7.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
12.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 56th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-503.11.1.el9_5
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2024-35840Moderate

kernel: mptcp: use OPTION_MPTCP_MPJ_SYNACK in subflow_finish_connect()

May 17, 2024

References

git.kernel.org / stable/c/413b913507326972135d2977975dbff8b7f2c453
Patch
git.kernel.org / stable/c/51e4cb032d49ce094605f27e45eabebc0408893c
Patch
git.kernel.org / stable/c/76e8de7273a22a00d27e9b8b7d4d043d6433416a
Patch
git.kernel.org / stable/c/ad3e8f5c3d5c53841046ef7a947c04ad45a20721
Patch
git.kernel.org / stable/c/be1d9d9d38da922bd4beeec5b6dd821ff5a1dfeb
Patch