What is CVE-2023-53684?

CVE-2023-53684 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-10-07.

How severe is CVE-2023-53684?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2023-53684 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2023-53684

In the Linux kernel, the following vulnerability has been resolved: xfrm: Zero padding when dumping algos and encap When copying data to user-space we should ensure that only valid data is copied over. Padding in structures may be filled with random (possibly sensitve) data and should never be given directly to user-space. This patch fixes the copying of xfrm algorithms and the encap template in xfrm_user so that padding is zeroed.

EPSS: 0.001 (3.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions c7a5899eb26e2a4d516d53f65b6dd67be2228041, 5.11, 0
Linux Linux_kernel — versions 6.3

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2023-53684?: CVE-2023-53684 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-10-07.
How severe is CVE-2023-53684?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-53684 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.