CVE-2026-43341

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Source
https://cve.org/CVERecord?id=CVE-2026-43341
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43341.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-43341
Downstream
Related
Published
2026-05-08T13:37:19.256Z
Modified
2026-07-03T18:29:36.641737166Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
net/ipv6: ioam6: prevent schema length wraparound in trace fill
Details

In the Linux kernel, the following vulnerability has been resolved:

net/ipv6: ioam6: prevent schema length wraparound in trace fill

ioam6filltrace_data() stores the schema contribution to the trace length in a u8. With bit 22 enabled and the largest schema payload, sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the remaining-space check. _ioam6filltracedata() then positions the write cursor without reserving the schema area but still copies the 4-byte schema header and the full schema payload, overrunning the trace buffer.

Keep sclen in an unsigned int so the remaining-space check and the write cursor calculation both see the full schema length.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43341.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8c6f6fa6772696be0c047a711858084b38763728
Fixed
d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2
Fixed
e96d48b37708d53cbdc47f6f60b0714fc4a5f596
Fixed
d1b041080086e91d3733a5438a8c51ad5d3d8e09
Fixed
77695a69baca9b99d95fad09fc78c2318736604f
Fixed
184d2e9db27c0f76226b5cad16fe29510a5d2280
Fixed
d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d
Fixed
5e67ba9bb531e1ec6599a82a065dea9040b9ce50

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43341.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.15.0
Fixed
5.15.210
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.168
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.134
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.81
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.22
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.12

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43341.json"