CVE-2026-53006Network attack vector

Unauthenticated kernel compromise via stale IPv6 pointers

Published Jun 24, 2026 · Updated Jun 24, 2026

Use-after-free in Linux Kernel IPv6 ICMP handling allows remote attackers to compromise or crash a host via crafted ICMPv6 packets. icmpv6_rcv() caches source and destination address pointers into skb->head before pskb_pull(), which can reallocate and free that buffer, leaving stale pointers for slow-path debug access. No account or user action is required; the attacker controls the ICMPv6 type, checksum, and fragmented or non-linear packet layout, and exploitation can disclose or modify kernel memory or panic the host.

CVSS severity9.8
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel IPv6 ICMP handling allows remote attackers to compromise or crash a host via crafted ICMPv6 packets. icmpv6_rcv() caches source and destination address pointers into skb->head before pskb_pull(), which can reallocate and free that buffer, leaving stale pointers for slow-path debug access. No account or user action is required; the attacker controls the ICMPv6 type, checksum, and fragmented or non-linear packet layout, and exploitation can disclose or modify kernel memory or panic the host.

The record

CVE
CVE-2026-53006
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4
  2. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <0069813e6ca9309eca78022bcb3aeb1e9ef90a12
  3. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <085e31a811ef234ef8c3e219c4636dfebfe7e10f
  4. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7
  5. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <38bdbc897c0d83a3e2b925a51b69420f1feba29a
  6. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <7bff2c8fe5c35ae58bf73104f53db3676e6e5d94
  7. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <7c66b368c6ff453f99cb39d84af93e908e51eef2
  8. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <aff0f28f5be803de2452ce702631c021fcd9ce8a
  9. Affected versionversion=4b3418fba0fe819197e3359d5ddbef84ba2c59de <f996edd7615e686ada141b7f3395025729ff8ccb

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.4; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <0069813e6ca9309eca78022bcb3aeb1e9ef90a12; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <085e31a811ef234ef8c3e219c4636dfebfe7e10f; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <38bdbc897c0d83a3e2b925a51b69420f1feba29a; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <7bff2c8fe5c35ae58bf73104f53db3676e6e5d94; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <7c66b368c6ff453f99cb39d84af93e908e51eef2; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <aff0f28f5be803de2452ce702631c021fcd9ce8a; version=4b3418fba0fe819197e3359d5ddbef84ba2c59de <f996edd7615e686ada141b7f3395025729ff8ccb

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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