CVE-2026-97583Hinoki check available

Use-after-free read via stale AFS peer data

Published Sep 25, 2026 · Updated Sep 25, 2026

Use-after-free in Linux 6.12.101 through 6.12.110 and 6.15 allows attackers to trigger a freed kernel-object read during an AFS callback. afs_fs_probe_fileserver() passes a NULL old address list, so afs_set_peer_appdata() binds replacement peers without clearing app_data on removed peers. Triggering the fault requires an address refresh, destruction of the former server object, and a later callback through an RxRPC connection that still pins a removed peer; KASAN confirmed a four-byte stale-object read, but no broader impact is published.

CVSS severityUnavailable
Unscored
EPSS probability0.41%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in Linux 6.12.101 through 6.12.110 and 6.15 allows attackers to trigger a freed kernel-object read during an AFS callback. afs_fs_probe_fileserver() passes a NULL old address list, so afs_set_peer_appdata() binds replacement peers without clearing app_data on removed peers. Triggering the fault requires an address refresh, destruction of the former server object, and a later callback through an RxRPC connection that still pins a removed peer; KASAN confirmed a four-byte stale-object read, but no broader impact is published.

The record

CVE
CVE-2026-97583
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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?

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  1. Affected versionversion=39ba6af83a7f9dee3e6a7916f41a48bcbda54eba <3afb988fd0411707bdafb9b321086fff0da28aae
  2. Affected versionversion=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <7f7f5589d048821dea316cbac9b37d27eaf7530e
  3. Affected versionversion=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <ba0623fc19a424f4745394c499f9f28a8d88d397
  4. Affected versionversion=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <c7f77a11a1e719192c7262aad38a3919aec62c21
  5. Affected versionversion=6.12.101 <6.12.111
  6. Affected versionversion=6.15

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=39ba6af83a7f9dee3e6a7916f41a48bcbda54eba <3afb988fd0411707bdafb9b321086fff0da28aae; version=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <7f7f5589d048821dea316cbac9b37d27eaf7530e; version=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <ba0623fc19a424f4745394c499f9f28a8d88d397; version=40e8b52fe8c8ab6920ea5f59c5469b6918cce624 <c7f77a11a1e719192c7262aad38a3919aec62c21; version=6.12.101 <6.12.111; version=6.15

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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