CVE-2026-22988Hinoki check available

Kernel memory corruption via stale ARP pointer

Published Jan 23, 2026 · Updated Jan 23, 2026

Memory corruption in the Linux Kernel ARP implementation allows local users to corrupt kernel memory during ARP packet creation. arp_create() caches an ARP-header pointer before dev_hard_header(), which can move skb->head and leave later ARP field writes aimed at stale storage. Triggering requires local access and a network-device path whose header builder moves the socket-buffer head; published assessments bound impact from a kernel crash to loss of confidentiality and integrity.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Memory corruption in the Linux Kernel ARP implementation allows local users to corrupt kernel memory during ARP packet creation. arp_create() caches an ARP-header pointer before dev_hard_header(), which can move skb->head and leave later ARP field writes aimed at stale storage. Triggering requires local access and a network-device path whose header builder moves the socket-buffer head; published assessments bound impact from a kernel crash to loss of confidentiality and integrity.

The record

CVE
CVE-2026-22988
Published
Jan 23, 2026
Updated
Jan 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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=1717357007db150c2d703f13f5695460e960f26c <029935507d0af6553c45380fbf6feecf756fd226
  2. Affected versionversion=17e7386234f740f3e7d5e58a47b5847ea34c3bc2 <e432dbff342b95fe44645f9a90fcf333c80f4b5e
  3. Affected versionversion=41a1a3140aff295dee8063906f70a514548105e8 <393525dee5c39acff8d6705275d7fcaabcfb7f0a
  4. Affected versionversion=5fe210533e3459197eabfdbf97327dacbdc04d60 <dd6ccec088adff4bdf33e2b2dd102df20a7128fa
  5. Affected versionversion=6.19-rc4
  6. Affected versionversion=91a2b25be07ce1a7549ceebbe82017551d2eec92 <949647e7771a4a01963fe953a96d81fba7acecf3
  7. Affected versionversion=adee129db814474f2f81207bd182bf343832a52e <70bddc16491ef4681f3569b3a2c80309a3edcdd1
  8. Affected versionversion=db5b4e39c4e63700c68a7e65fc4e1f1375273476 <c92510f5e3f82ba11c95991824a41e59a9c5ed81

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1717357007db150c2d703f13f5695460e960f26c <029935507d0af6553c45380fbf6feecf756fd226; version=17e7386234f740f3e7d5e58a47b5847ea34c3bc2 <e432dbff342b95fe44645f9a90fcf333c80f4b5e; version=41a1a3140aff295dee8063906f70a514548105e8 <393525dee5c39acff8d6705275d7fcaabcfb7f0a; version=5fe210533e3459197eabfdbf97327dacbdc04d60 <dd6ccec088adff4bdf33e2b2dd102df20a7128fa; version=6.19-rc4; version=91a2b25be07ce1a7549ceebbe82017551d2eec92 <949647e7771a4a01963fe953a96d81fba7acecf3; version=adee129db814474f2f81207bd182bf343832a52e <70bddc16491ef4681f3569b3a2c80309a3edcdd1; version=db5b4e39c4e63700c68a7e65fc4e1f1375273476 <c92510f5e3f82ba11c95991824a41e59a9c5ed81

Published CVSS scores

6.0SUSECVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.9SUSECVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
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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