CVE-2025-68787

Kernel-memory exhaustion via leaked NET/ROM skbs

Published Jan 13, 2026 · Updated Jan 13, 2026

Memory leak in the Linux kernel NET/ROM stack allows attackers to consume kernel memory by repeatedly sending NET/ROM socket messages. When sock_alloc_send_skb() fails in nr_output(), the error path returns without freeing the original skb allocated by nr_sendmsg(). Reachability requires NET/ROM support and the allocation-failure path; repeated triggering produces progressive kernel-memory loss and eventual service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel NET/ROM stack allows attackers to consume kernel memory by repeatedly sending NET/ROM socket messages. When sock_alloc_send_skb() fails in nr_output(), the error path returns without freeing the original skb allocated by nr_sendmsg(). Reachability requires NET/ROM support and the allocation-failure path; repeated triggering produces progressive kernel-memory loss and eventual service interruption.

The record

CVE
CVE-2025-68787
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <156a0f6341dce634a825db49ca20b48b1ae9bcc1
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <613d12dd794e078be8ff3cf6b62a6b9acf7f4619
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73839497bbde5cd4fd02bbd9c8bc2640780ae65d
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d1ccba4b171cd504ecfa47349cb9864fc9d687c
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <156a0f6341dce634a825db49ca20b48b1ae9bcc1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <613d12dd794e078be8ff3cf6b62a6b9acf7f4619; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <73839497bbde5cd4fd02bbd9c8bc2640780ae65d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d1ccba4b171cd504ecfa47349cb9864fc9d687c; version=2.6.12

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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