01 Record

CVE-2025-39894

netfilter: br_netfilter: do not check confirmed bit in br_nf_local_in() after confirm

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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02 Description

netfilter: br_netfilter: do not check confirmed bit in br_nf_local_in() after confirm

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 26.1% 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 2026-10-19.

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: 2025-10-01 07:42Z1 YR AGO
Last updated: 2026-10-15 22:02Z13 DAYS AGO
Reserved: 2025-04-16
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 7.5)
CNA CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 0757ab523f938131602e68a1c0f64275e145042b9c540204e02e3b854bca2908

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux7c3f28599652acf431a2211168de4a583f30b6d5 to < d00c8b0daf56012f69075e3377da67878c775e4c, 2b1414d5e94e477edff1d2c79030f1d742625ea0 to < ccbad4803225eafe0175d3cb19f0d8d73b504a94, 80cd0487f630b5382734997c3e5e3003a77db315 to < 50db11e2bbb635e38e3dd096215580d6adb41fb0, 62e7151ae3eb465e0ab52a20c941ff33bb6332e9 to < c47ca77fee9071aa543bae592dd2a384f895c8b6, 62e7151ae3eb465e0ab52a20c941ff33bb6332e9 to < a74abcf0f09f59daeecf7a3ba9c1d690808b0afe, 62e7151ae3eb465e0ab52a20c941ff33bb6332e9 to < 479a54ab92087318514c82428a87af2d7af1a576, cb734975b0ffa688ff6cc0eed463865bf07b6c01, 5.15.151 to < 5.15.192, 6.1.81 to < 6.1.151, 6.6.21 to < 6.6.105, 6.7.9 to < 6.8, 6.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/d00c8b0daf56012f69075e3377da67878c775e4c
git.kernel.orghttps://git.kernel.org/stable/c/ccbad4803225eafe0175d3cb19f0d8d73b504a94
git.kernel.orghttps://git.kernel.org/stable/c/50db11e2bbb635e38e3dd096215580d6adb41fb0
git.kernel.orghttps://git.kernel.org/stable/c/c47ca77fee9071aa543bae592dd2a384f895c8b6
git.kernel.orghttps://git.kernel.org/stable/c/a74abcf0f09f59daeecf7a3ba9c1d690808b0afe
git.kernel.orghttps://git.kernel.org/stable/c/479a54ab92087318514c82428a87af2d7af1a576
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.153-1

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

Debian 13

linux
Fixed in 6.12.48-1

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

Debian 14

linux
Fixed in 6.16.6-1

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