01 Record

CVE-2024-40910

ax25: Fix refcount imbalance on inbound connections

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

ax25: Fix refcount imbalance on inbound connections

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

0.44% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 38.5% 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 2026-08-04.

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

2024-07-12 12:20Z2 YR AGO

Last updated

2026-08-05 11:33Z2 MO AGO

Reserved

2024-07-12

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

CWE-911Improper Update of Reference CountBase

Data version

5.2

Document digest

ab6f39fc21bf451cf906043d433774720e53563b41c48aea2f0705fd31cf96a8

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux9fd75b66b8f68498454d685dc4ba13192ae069b0 to < f4df9d6c8d4e4c818252b0419c2165d66eabd4eb, 9fd75b66b8f68498454d685dc4ba13192ae069b0 to < 52100fd74ad07b53a4666feafff1cd11436362d3, 9fd75b66b8f68498454d685dc4ba13192ae069b0 to < a723a6c8d4831cc8e2c7b0c9f3f0c010d4671964, 9fd75b66b8f68498454d685dc4ba13192ae069b0 to < 3c34fb0bd4a4237592c5ecb5b2e2531900c55774, c44a453ffe16eb08acdc6129ac4fa0192dbc0456, de55a1338e6a48ff1e41ea8db1432496fbe2a62b, 9e1e088a57c23251f1cfe9601bbd90ade2ea73b9, b20a5ab0f5fb175750c6bafd4cf12daccf00c738, 452ae92b99062d2f6a34324eaf705a3b7eac9f8b, 534156dd4ed768e30a43de0036f45dca7c54818f, 4.14.277 to < 4.15, 4.19.240 to < 4.20, 5.4.190 to < 5.5, 5.10.112 to < 5.11, 5.15.35 to < 5.16, 5.17.2 to < 5.18, 5.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f4df9d6c8d4e4c818252b0419c2165d66eabd4eb
git.kernel.orghttps://git.kernel.org/stable/c/52100fd74ad07b53a4666feafff1cd11436362d3
git.kernel.orghttps://git.kernel.org/stable/c/a723a6c8d4831cc8e2c7b0c9f3f0c010d4671964
git.kernel.orghttps://git.kernel.org/stable/c/3c34fb0bd4a4237592c5ecb5b2e2531900c55774
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.99-1

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

Debian 13

linux
Fixed in 6.9.7-1

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

Debian 14

linux
Fixed in 6.9.7-1

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