01 Record

CVE-2023-53726

arm64: csum: Fix OoB access in IP checksum code for negative lengths

HighPUBLISHEDCNA: Linux

CNA base score7.1 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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02 Description

arm64: csum: Fix OoB access in IP checksum code for negative lengths

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

0.15% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 3.7% of scored records. A rank, not a probability.

NVD base score

7.1 (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:H/I:N/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-10-28.

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: 2025-10-22 13:23Z1 YR AGO
Last updated: 2026-10-15 21:41Z13 DAYS AGO
Reserved: 2025-10-22
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 7.1)
CNA CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 490b353c007ff783d5594352a510bf361c11bfc736adeb40ddb7af4df72e1fd3

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux5777eaed566a1d63e344d3dd8f2b5e33be20643e to < 5a85727239a23de1cc8d93985f1056308128f3e2, 5777eaed566a1d63e344d3dd8f2b5e33be20643e to < 9a43563cfd6b9200ff2f76b3f9fcdcb217ceb523, 5777eaed566a1d63e344d3dd8f2b5e33be20643e to < ba0b46166b8e547024d02345a68b747841931ad2, 5777eaed566a1d63e344d3dd8f2b5e33be20643e to < a5ad2f87d8e74e351d3f500ad9d5b3a5653e1c6f, 5777eaed566a1d63e344d3dd8f2b5e33be20643e to < fcdf904e866de0e3715835e50409fda3b2590527, 5777eaed566a1d63e344d3dd8f2b5e33be20643e to < 8bd795fedb8450ecbef18eeadbd23ed8fc7630f5, 5.6—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/5a85727239a23de1cc8d93985f1056308128f3e2
git.kernel.orghttps://git.kernel.org/stable/c/9a43563cfd6b9200ff2f76b3f9fcdcb217ceb523
git.kernel.orghttps://git.kernel.org/stable/c/ba0b46166b8e547024d02345a68b747841931ad2
git.kernel.orghttps://git.kernel.org/stable/c/a5ad2f87d8e74e351d3f500ad9d5b3a5653e1c6f
git.kernel.orghttps://git.kernel.org/stable/c/fcdf904e866de0e3715835e50409fda3b2590527
git.kernel.orghttps://git.kernel.org/stable/c/8bd795fedb8450ecbef18eeadbd23ed8fc7630f5

07 Fixed in

Debian 12

linux
Fixed in 6.1.55-1

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

Debian 13

linux
Fixed in 6.5.3-1

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

Debian 14

linux
Fixed in 6.5.3-1

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