01 Record

CVE-2025-21891

ipvlan: ensure network headers are in skb linear part

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

ipvlan: ensure network headers are in skb linear part

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 9.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-03-27 14:57Z1 YR AGO

Last updated

2026-05-11 21:08Z5 MO AGO

Reserved

2024-12-29

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

CWE-908Use of Uninitialized ResourceBase

Data version

5.2

Document digest

266ad8987f3899e0ed405b1305dc2a1983ff93359492e8a407fcfbe74973b91f

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux2ad7bf3638411cb547f2823df08166c13ab04269 to < 5b8dea8d1612dc7151d2457d7d2e6a69820309bf, 2ad7bf3638411cb547f2823df08166c13ab04269 to < 4ec48f812804f370f622e0874e6dd8fcc58241cd, 2ad7bf3638411cb547f2823df08166c13ab04269 to < 5353fd89663c48f56bdff975c562cfe78b1a2e4c, 2ad7bf3638411cb547f2823df08166c13ab04269 to < e2a4f76a2d8a44816ecd25bcbdb47b786d621974, 2ad7bf3638411cb547f2823df08166c13ab04269 to < 27843ce6ba3d3122b65066550fe33fb8839f8aef, 3.19—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/5b8dea8d1612dc7151d2457d7d2e6a69820309bf
git.kernel.orghttps://git.kernel.org/stable/c/4ec48f812804f370f622e0874e6dd8fcc58241cd
git.kernel.orghttps://git.kernel.org/stable/c/5353fd89663c48f56bdff975c562cfe78b1a2e4c
git.kernel.orghttps://git.kernel.org/stable/c/e2a4f76a2d8a44816ecd25bcbdb47b786d621974
git.kernel.orghttps://git.kernel.org/stable/c/27843ce6ba3d3122b65066550fe33fb8839f8aef
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.133-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.19-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 6.12.19-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.