CVE-2026-53006

ipv6: fix possible UAF in icmpv6_rcv()

publishedCWE-825

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr when net_dbg_ratelimited() is called in the slow path. - Avoid potential future misuse after pskb_pull() call.

Technical severity9.8 criticalCVSS 3.1 · CNA: Linux

Published2026-06-24Source updated 2026-11-10

Collected2026-11-102 attributed sources

Fixes and workarounds

Fix

RHSA-2026:64767: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) RHSA-2026:47017: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10) RHSA-2026:67723: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) RHSA-2026:65712: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4), Red Hat Enterprise Linux Real Time E4S (v.9.4), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) RHSA-2026:62568: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) RHSA-2026:45192: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9) RHSA-2026:47011: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) RHSA-2026:65710: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) RHSA-2026:65711: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) RHSA-2026:61932: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8) RHSA-2026:47010: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) RHSA-2026:67721: Red Hat Enterprise Linux Real Time E4S (v.9.2), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)

Source: ADP: redhat-SADP

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Linux Linux	≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 7bff2c8fe5c35ae58bf73104f53db3676e6e5d94 (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < aff0f28f5be803de2452ce702631c021fcd9ce8a (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 38bdbc897c0d83a3e2b925a51b69420f1feba29a (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 0069813e6ca9309eca78022bcb3aeb1e9ef90a12 (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7 (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 7c66b368c6ff453f99cb39d84af93e908e51eef2 (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < 085e31a811ef234ef8c3e219c4636dfebfe7e10f (affected, git) ≥ 4b3418fba0fe819197e3359d5ddbef84ba2c59de; < f996edd7615e686ada141b7f3395025729ff8ccb (affected, git) Other versions: unaffected	CNA: Linux
Linux Linux	4.4 (affected) ≥ 0; < 4.4 (unaffected, semver) ≥ 5.10.258; ≤ 5.10.* (unaffected, semver) ≥ 5.15.209; ≤ 5.15.* (unaffected, semver) ≥ 6.1.175; ≤ 6.1.* (unaffected, semver) ≥ 6.6.141; ≤ 6.6.* (unaffected, semver) ≥ 6.12.91; ≤ 6.12.* (unaffected, semver) ≥ 6.18.33; ≤ 6.18.* (unaffected, semver) ≥ 7.0.10; ≤ 7.0.* (unaffected, semver) ≥ 7.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected	CNA: Linux
Red Hat Enterprise Linux 10 Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:6.12.0-211.40.1.el10_2; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:6.12.0-55.103.1.el10_0; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8 Red Hat `kernel-rt` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-553.148.1.rt7.489.el8_10; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8 Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-553.148.1.el8_10; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-305.206.1.el8_4; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-305.206.1.el8_4; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-372.213.1.el8_6; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-372.213.1.el8_6; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-477.163.1.el8_8; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.0-477.163.1.el8_8; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 9 Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:5.14.0-687.30.1.el9_8; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:5.14.0-427.149.1.el9_4; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	≥ 0:5.14.0-570.138.1.el9_6; < * (unaffected, rpm) Other versions: affected	ADP: redhat-SADP
Red Hat Enterprise Linux 6 Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	ADP: redhat-SADP
Red Hat Enterprise Linux 7 Red Hat `kernel` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	ADP: redhat-SADP
Red Hat Enterprise Linux 7 Red Hat `kernel-rt` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unaffected	ADP: redhat-SADP
Red Hat Enterprise Linux 9 Red Hat `kernel-rt` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: affected	ADP: redhat-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens	≥ V3.1.6; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens	≥ V3.1.7; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens	≥ V3.1.6; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens	≥ V3.1.7; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens	≥ V3.1.6; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens	≥ V3.1.7; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens	≥ V3.1.6; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens	≥ V3.1.7; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens	≥ V3.1.6; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens	≥ V3.1.7; < * (affected, custom) Other versions: unknown	ADP: siemens-SADP

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 9.8 critical	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`	CNA: Linux
3.1 / 7.0 high	`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`	ADP: redhat-SADP

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://git.kernel.org/stable/c/7bff2c8fe5c35ae58bf73104f53db3676e6e5d94CNA: Linux
https://git.kernel.org/stable/c/aff0f28f5be803de2452ce702631c021fcd9ce8aCNA: Linux
https://git.kernel.org/stable/c/38bdbc897c0d83a3e2b925a51b69420f1feba29aCNA: Linux
https://git.kernel.org/stable/c/0069813e6ca9309eca78022bcb3aeb1e9ef90a12CNA: Linux
https://git.kernel.org/stable/c/1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7CNA: Linux
https://git.kernel.org/stable/c/7c66b368c6ff453f99cb39d84af93e908e51eef2CNA: Linux
https://git.kernel.org/stable/c/085e31a811ef234ef8c3e219c4636dfebfe7e10fCNA: Linux
https://git.kernel.org/stable/c/f996edd7615e686ada141b7f3395025729ff8ccbCNA: Linux
https://access.redhat.com/security/cve/CVE-2026-53006ADP: redhat-SADP · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2492363ADP: redhat-SADP · issue-tracking, x_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53006.jsonADP: redhat-SADP · x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:64767ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:47017ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67723ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65712ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62568ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:45192ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:47011ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65710ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65711ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61932ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:47010ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:67721ADP: redhat-SADP · vendor-advisory, x_refsource_REDHAT
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlADP: siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlADP: siemens-SADP

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