Vulnerability-Lookup

FKIE_CVE-2026-43341

Vulnerability from fkie_nvd - Published: 2026-05-08 14:16 - Updated: 2026-05-15 19:45

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net/ipv6: ioam6: prevent schema length wraparound in trace fill ioam6_fill_trace_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. __ioam6_fill_trace_data() 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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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    }
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          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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CVE-2026-43341 (GCVE-0-2026-43341)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:37 – Updated: 2026-05-11 22:22

Title

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

Summary

Severity

9.8 (Critical)


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

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/e96d48b37708d53cb…
https://git.kernel.org/stable/c/d1b041080086e91d3…
https://git.kernel.org/stable/c/77695a69baca9b99d…
https://git.kernel.org/stable/c/184d2e9db27c0f762…
https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f…
https://git.kernel.org/stable/c/5e67ba9bb531e1ec6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < e96d48b37708d53cbdc47f6f60b0714fc4a5f596 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < d1b041080086e91d3733a5438a8c51ad5d3d8e09 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 77695a69baca9b99d95fad09fc78c2318736604f (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 184d2e9db27c0f76226b5cad16fe29510a5d2280 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 5e67ba9bb531e1ec6599a82a065dea9040b9ce50 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43341

CVE-2026-43341 (GCVE-0-2026-43341)

Tags

Sightings

Nomenclature