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CVE-2024-40940

21
FAUCET Score

CVE-2024-40940 is a high-severity vulnerability affecting the Linux kernel, specifically within the net/mlx5 driver. It involves a use-after-free error (CWE-415) where a "tainted pointer" is deleted multiple times if flow rule creation fails in mlx5_lag_create_port_sel_table(). This local vulnerability (CVSS 7.8) allows an attacker with low privileges to achieve high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.19, < 6.1.95CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.6.35CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.7, < 6.9.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.10CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
6.10CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.26%
Probability of exploitation in next 30 days
EPSS Percentile
17.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0026 is in the 52nd percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2024-40940Low

kernel: net/mlx5: Fix tainted pointer delete is case of flow rules creation fail

Jul 12, 2024

References

git.kernel.org / stable/c/229bedbf62b13af5aba6525ad10b62ad38d9ccb5
Patch
git.kernel.org / stable/c/531eab2da27dd42d68dfb841d82e987f4a6738b8
Patch
git.kernel.org / stable/c/a03a3fa12769e25f4385bee587afe1445aee7f7a
Patch
git.kernel.org / stable/c/d857df86837ac1c30592e8a068204d16feac9930
Patch
lists.debian.org / debian-lts-announce/2025/01/msg00001.html