CVE-2025-37963: debian linux — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users Support for eBPF programs loaded by unprivileged users is typically disabled. This means only cBPF programs need to be mitigated for BHB. In addition, only mitigate cBPF programs that were loaded by an unprivileged user. Privileged users can also load the same program via eBPF, making the mitigation pointless.

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CVSS v3.1 Score

5.5

MEDIUM

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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 5.10.239
linux	linux_kernel	5.11 — 5.15.186
linux	linux_kernel	5.16 — 6.1.139
linux	linux_kernel	6.2 — 6.6.91
linux	linux_kernel	6.7 — 6.12.29
linux	linux_kernel	6.13 — 6.14.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/038866e01ea5e5a3d948898ac216e531e7848669 https://git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685 https://git.kernel.org/stable/c/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a https://git.kernel.org/stable/c/80251f62028f1ab2e09be5ca3123f84e8b00389a https://git.kernel.org/stable/c/df53d418709205450a02bb4d71cbfb4ff86f2c1e https://git.kernel.org/stable/c/e5f5100f1c64ac6c72671b2cf6b46542fce93706 https://git.kernel.org/stable/c/f300769ead032513a68e4a02e806393402e626f8

Other References

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Frequently Asked Questions

What is CVE-2025-37963? +

In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users Support for eBPF programs loaded by unprivileged users is typically disabled. This means only cBPF programs need to be mitigated for BHB. In addition, only mitigate cBPF programs that were loaded by an unprivileged user. Privileged users can also load the same program via eBPF, making the mitigation pointless. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37963? +

CVE-2025-37963 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37963? +

CVE-2025-37963 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-37963? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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