What is CVE-2024-43840?

CVE-2024-43840 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.0 onward and patched in 6.1.140, 6.6.92, 6.10.3 and others. CVE-2024-43840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-43840?

CVE-2024-43840 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-43840?

Yes, CVE-2024-43840 has been patched. Fixed versions include 6.1.140, 6.6.92, 6.10.3 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-43840 actively exploited?

CVE-2024-43840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-43840

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG When BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls __bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them the struct bpf_tramp_image *im pointer as an argument in R0. The trampoline generation code uses emit_addr_mov_i64() to emit instructions for moving the bpf_tramp_image address into R0, but emit_addr_mov_i64() assumes the address to be in the vmalloc() space and uses only 48 bits. Because bpf_tramp_image is allocated using kzalloc(), its address can use more than 48-bits, in this case the trampoline will pass an invalid address to __bpf_tramp_enter/exit() causing a kernel crash. Fix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64() as it can work with addresses that are greater than 48-bits.

Package Linux Kernel

Published 2024-08-17

Last modified 2025-11-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.1.140, 6.6.92, 6.10.3, 6.11 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.1.140 6.1.x ✓ 6.6.92 6.6.x ✓ 6.10.3 6.10.x ✓ 6.11

References

5 total

Kernel Git
https://git.kernel.org/stable/c/19d3c179a37730caf600a97fed3794feac2b197b

Patch
Kernel Git
https://git.kernel.org/stable/c/6d218fcc707d6b2c3616b6cd24b948fd4825cfec

Patch
Kernel Git
https://git.kernel.org/stable/c/077149478497b2f00ff4fd9da2c892defa6418d8
Kernel Git
https://git.kernel.org/stable/c/d9664e6ff040798a46cdc5d401064f55b8676c83
Debian Security
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html

Details

CVE ID CVE-2024-43840

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-08-17

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-43840?

CVE-2024-43840 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.140, 6.6.92, 6.10.3 and others. CVE-2024-43840 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-43840?

CVE-2024-43840 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-43840?

Yes. CVE-2024-43840 has been patched. Fixed versions include 6.1.140, 6.6.92, 6.10.3 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-43840 actively exploited?

No. CVE-2024-43840 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.