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CVE-2024-40913

21
FAUCET Score

CVE-2024-40913 is a Use-After-Free (UAF) vulnerability in the Linux kernel's cachefiles subsystem, affecting Linux kernel versions. The flaw arises from prematurely exposing an anonymous file descriptor (anon_fd) to userland before successfully copying data, potentially leading to a UAF condition when the descriptor is closed. Rated 7.8 HIGH (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), this vulnerability allows a local attacker with low privileges to achieve high confidentiality, integrity, and availability impacts. 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
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 57th 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 (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-503.11.1.el9_5
View patch

Vendor Advisories (1)

redhatCVE-2024-40913Moderate

kernel: cachefiles: defer exposing anon_fd until after copy_to_user() succeeds

Jul 12, 2024

References

git.kernel.org / stable/c/4b4391e77a6bf24cba2ef1590e113d9b73b11039
Patch
git.kernel.org / stable/c/b9f58cdae6a364a3270fd6b6a46e0fd4f7f8ce32
Patch
git.kernel.org / stable/c/d2d3eb377a5d081bf2bed177d354a4f59b74da88
Patch
git.kernel.org / stable/c/eac51d9daacd61dcc93333ff6a890cf3efc8c1c0
Patch
lists.debian.org / debian-lts-announce/2025/01/msg00001.html