CVE-2025-38377

Kernel memory corruption via skipped neighbour removal

Published Jul 25, 2025 · Updated Aug 5, 2026

Use-after-free in Linux kernel ROSE routing allows adjacent remote attackers to corrupt kernel memory through crafted AX.25 traffic. rose_rt_device_down() iterates forward while shrinking and compacting a neighbour array, skips duplicate entries, then frees a still-referenced rose_neigh object. ROSE must be enabled and an AX.25 interface brought down; later routing or local AF_ROSE access can leak kernel data, corrupt memory, or crash the host.

CVSS severity8.4
High
EPSS probability0.24%
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 ROSE routing allows adjacent remote attackers to corrupt kernel memory through crafted AX.25 traffic. rose_rt_device_down() iterates forward while shrinking and compacting a neighbour array, skips duplicate entries, then frees a still-referenced rose_neigh object. ROSE must be enabled and an AX.25 interface brought down; later routing or local AF_ROSE access can leak kernel data, corrupt memory, or crash the host.

The record

CVE
CVE-2025-38377
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <2b952dbb32fef835756f07ff0cd77efbb836dfea
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c6c82ee074bfcfd1bc978ec45bfea37703d840a
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <34a500caf48c47d5171f4aa1f237da39b07c6157
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <446ac00b86be1670838e513b643933d78837d8db
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a1841c9609377e989ec41c16551309ce79c39e4
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <94e0918e39039c47ddceb609500817f7266be756
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6b232e16e08c6dc120672b4753392df0d28c1b4
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe62a35fb1f77f494ed534fc69a9043dc5a30ce1
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2b952dbb32fef835756f07ff0cd77efbb836dfea; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c6c82ee074bfcfd1bc978ec45bfea37703d840a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <34a500caf48c47d5171f4aa1f237da39b07c6157; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <446ac00b86be1670838e513b643933d78837d8db; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a1841c9609377e989ec41c16551309ce79c39e4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <94e0918e39039c47ddceb609500817f7266be756; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6b232e16e08c6dc120672b4753392df0d28c1b4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe62a35fb1f77f494ed534fc69a9043dc5a30ce1; version=2.6.12

Published CVSS scores

8.4Canonical UbuntuCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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