CVE-2025-37963 [Medium] | Security Vulnerability in Linux Kernel

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.09%	0.16%	+0.07%
2	2026-03-16	0.03%	0.09%	+0.06%
3	2025-12-17	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.09%

0.16%

+0.07%

2026-03-16

0.03%

0.09%

+0.06%

2025-12-17

—

0.03%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

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

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2025-37963

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2025-37963 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6.	https://security-tracker.debian.org/tracker/CVE-2025-37963
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-37963
`suse`	low	—	https://www.suse.com/security/cve/CVE-2025-37963/
`ubuntu`	medium	CVE-2025-37963 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 168, released 168, needed 45, not-affected 22, needs-triage 2, pending 1.	https://ubuntu.com/security/CVE-2025-37963

Affected software / configurations for CVE-2025-37963

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 5.10.239	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.186	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.1.139	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.2, < 6.6.91	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.7, < 6.12.29	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.14.7	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc1::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc2::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc3::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc4::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc5::::::
linux	linux_kernel	6.15	cpe:2.3:o:linux:linux_kernel:6.15:rc6::::::
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2025-37963

URL	Tags
https://git.kernel.org/stable/c/038866e01ea5e5a3d948898ac216e531e7848669	Patch
https://git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685	Patch
https://git.kernel.org/stable/c/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a	Patch
https://git.kernel.org/stable/c/80251f62028f1ab2e09be5ca3123f84e8b00389a	Patch
https://git.kernel.org/stable/c/df53d418709205450a02bb4d71cbfb4ff86f2c1e	Patch
https://git.kernel.org/stable/c/e5f5100f1c64ac6c72671b2cf6b46542fce93706	Patch
https://git.kernel.org/stable/c/f300769ead032513a68e4a02e806393402e626f8	Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory

URL

CVE-2025-37963 | arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users

Exploit prediction scoring system (EPSS) score for CVE-2025-37963

Common vulnerability scoring system (CVSS) metrics for CVE-2025-37963

Weakness enumeration for CVE-2025-37963

OS Trackers for CVE-2025-37963

Affected software / configurations for CVE-2025-37963

References for CVE-2025-37963