01 Record

CVE-2026-43083

net: ioam6: fix OOB and missing lock

CriticalPUBLISHEDCNA: Linux

CNA base score9.1 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

View raw JSON

02 Description

net: ioam6: fix OOB and missing lock

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

0.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 46.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-21.

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

2026-05-06 07:40Z5 MO AGO

Last updated

2026-10-21 12:40Z8 DAYS AGO

Reserved

2026-05-01

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

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

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

ec018c96f0070e32b8a6caaa4b07b7a6c15f838292bffec5e9dba770be93d422

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxb63c5478e9cb1d1504eb02d9dac827ad24612b32 to < a05a85779c2574b6534abb8cdc6d65fbc2e91208, b63c5478e9cb1d1504eb02d9dac827ad24612b32 to < f1af9d19503b73011dae5051c354fd39b03e240d, b63c5478e9cb1d1504eb02d9dac827ad24612b32 to < 6d1d9ed9b409e0662241e3d245d574a18f643494, b63c5478e9cb1d1504eb02d9dac827ad24612b32 to < 95a1334748c95dd15546056280ade0c4b8dd7b78, b63c5478e9cb1d1504eb02d9dac827ad24612b32 to < b30b1675aa2bcf0491fd3830b051df4e08a7c8ca, 5.17—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/a05a85779c2574b6534abb8cdc6d65fbc2e91208
git.kernel.orghttps://git.kernel.org/stable/c/f1af9d19503b73011dae5051c354fd39b03e240d
git.kernel.orghttps://git.kernel.org/stable/c/6d1d9ed9b409e0662241e3d245d574a18f643494
git.kernel.orghttps://git.kernel.org/stable/c/95a1334748c95dd15546056280ade0c4b8dd7b78
git.kernel.orghttps://git.kernel.org/stable/c/b30b1675aa2bcf0491fd3830b051df4e08a7c8ca

07 Fixed in

Debian 12

linux
No fix yet

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

Debian 13

linux
No fix yet

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

Debian 14

linux
Fixed in 6.19.14-1

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