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CVE Record

CVE-2026-23060: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec

In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than the minimum expected length, crypto_authenc_esn_decrypt() can advance past the end of the destination scatterlist and trigger a NULL pointer dereference in scatterwalk_map_and_copy(), leading to a kernel panic (DoS). Add a minimum AAD length check to fail fast on invalid inputs.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-23060 is a Linux kernel denial-of-service issue in the authencesn crypto path used with ESP/ESN-formatted data. Too-short associated data can trigger a NULL pointer dereference and kernel panic. Public sources show a kernel fix, but no CVSS score or active exploitation evidence is provided.

Executive priority

Treat this as a reliability risk for Linux-dependent services. Prioritize patch validation on systems where a kernel panic would cause material outage, while avoiding emergency escalation unless vendor advisories identify exposed products or active exploitation.

Technical view

crypto_authenc_esn_decrypt() assumed AAD had the minimum ESP/ESN layout. If assoclen is below 8, processing can advance beyond the destination scatterlist and fault in scatterwalk_map_and_copy(). The Linux fix adds an early minimum AAD length check and rejects invalid input.

Likely exposure

Systems running affected Linux kernel builds with code paths that use authencesn and ESP/ESN-formatted AAD may be exposed. The provided affected-version data is limited and partly ambiguous, so kernel vendor mapping should be verified before scoping impact.

Exploitation context

The bundle does not show KEV listing or cited active exploitation. The described impact is kernel panic denial of service, not data theft or code execution. Attack prerequisites and remote reachability are not established in the provided sources.

Researcher notes

The key uncertainty is exposure: the source describes the vulnerable crypto behavior and fix, but not exploit preconditions. Avoid assuming all Linux systems are practically reachable. Focus analysis on authencesn users, ESP/ESN data handling, and vendor backport status.

Mitigation direction

  • Apply Linux stable kernel updates containing the authencesn AAD length check.
  • Confirm whether your distribution backported one of the referenced kernel fixes.
  • Check vendor advisories, including the Siemens reference, for product-specific guidance.
  • Prioritize internet-facing or high-availability systems using IPsec ESP/ESN paths.

Validation and detection

  • Inventory Linux kernel versions and vendor package build identifiers.
  • Verify whether the authencesn fix commit is present or backported.
  • Review IPsec or ESP/ESN usage on critical Linux systems.
  • Track distribution and product advisories for exact affected package ranges.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2026-23060 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
9Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234, 104880a6b470958ddc30e139c41aa4f6ed3a5234unaffected
LinuxLinux4.3, 0, 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19affected
Weakness

CWE details

No CWE listed

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