01 Record

CVE-2026-43038

ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.26% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 17.2% of scored records. A rank, not a probability.
NVD base score: 9.8 (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:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-08-20.
Red Hat severity: Important. 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: 2026-05-01 14:15Z4 MO AGO
Last updated: 2026-08-20 12:31Z15 DAYS AGO
Reserved: 2026-05-01
Assigning CNA: Linux
Record state: PUBLISHED
Severity: Critical (CVSS 9.8)
CNA CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 039102d60df3aab58c9a417810818c2642b23207d0c9e1a3de91ccc8dc9d7dd7

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxca15a078bd907df5fc1c009477869c5cbde3b753 to < c438ba010171b70bad22fc18b1d5bdc3627476e8, ca15a078bd907df5fc1c009477869c5cbde3b753 to < 0452b6526b2f54b2413b9cb4ff1ea2ac542c99c7, ca15a078bd907df5fc1c009477869c5cbde3b753 to < a4437faf135da293d16fcc4cc607316742bd0ebb, ca15a078bd907df5fc1c009477869c5cbde3b753 to < 3d5127d998de617b130aae96b138dba22ac6a8a7, ca15a078bd907df5fc1c009477869c5cbde3b753 to < e41953e7d118e2702bcb217879c173d9d1d3cd4e, ca15a078bd907df5fc1c009477869c5cbde3b753 to < a2edbb6393972a02114b6003953a5cef3104fada, ca15a078bd907df5fc1c009477869c5cbde3b753 to < 1ceeebd5bd6d855b17a5df625109bfe29129d7cf, ca15a078bd907df5fc1c009477869c5cbde3b753 to < 86ab3e55673a7a49a841838776f1ab18d23a67b5, 3.13—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/c438ba010171b70bad22fc18b1d5bdc3627476e8
git.kernel.orghttps://git.kernel.org/stable/c/0452b6526b2f54b2413b9cb4ff1ea2ac542c99c7
git.kernel.orghttps://git.kernel.org/stable/c/a4437faf135da293d16fcc4cc607316742bd0ebb
git.kernel.orghttps://git.kernel.org/stable/c/3d5127d998de617b130aae96b138dba22ac6a8a7
git.kernel.orghttps://git.kernel.org/stable/c/e41953e7d118e2702bcb217879c173d9d1d3cd4e
git.kernel.orghttps://git.kernel.org/stable/c/a2edbb6393972a02114b6003953a5cef3104fada
git.kernel.orghttps://git.kernel.org/stable/c/1ceeebd5bd6d855b17a5df625109bfe29129d7cf
git.kernel.orghttps://git.kernel.org/stable/c/86ab3e55673a7a49a841838776f1ab18d23a67b5
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-43038vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2464397https://bugzilla.redhat.com/show_bug.cgi?id=2464397issue-trackingx_refsource_REDHAT
security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43038.jsonx_sadp-csaf-vex
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:24343vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30129vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:22940vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:23237vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:23224vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30848vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:55618vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25121vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:55762vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:26535vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25533vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:22964vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:55837vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:56224vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:56225vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:55763vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:25120vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:22900vendor-advisoryx_refsource_REDHAT
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html

01 Record index

CVE-2026-43038

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-43038

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References