CVE-2024-38586

Kernel memory corruption via stale fragment count

Published Jun 19, 2024 · Updated May 11, 2026

Out-of-bounds write in the Linux r8169 driver allows local users to corrupt the transmit ring via small fragmented packets. rtl8169_start_xmit reads nr_frags before rtl8169_tso_csum_v2 pads a short packet, then builds descriptors from a stale fragment count and later passes a null DMA address to dma_unmap_single. Exploitation requires an RTL8125b interface and local packet transmission, exposing kernel memory corruption and service interruption.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux r8169 driver allows local users to corrupt the transmit ring via small fragmented packets. rtl8169_start_xmit reads nr_frags before rtl8169_tso_csum_v2 pads a short packet, then builds descriptors from a stale fragment count and later passes a null DMA address to dma_unmap_single. Exploitation requires an RTL8125b interface and local packet transmission, exposing kernel memory corruption and service interruption.

The record

CVE
CVE-2024-38586
Published
Jun 19, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.7
  2. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <078d5b7500d70af2de6b38e226b03f0b932026a6
  3. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <0c48185a95309556725f818b82120bb74e9c627d
  4. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <54e7a0d111240c92c0f02ceba6eb8f26bf6d6479
  5. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <61c1c98e2607120ce9c3fa1bf75e6da909712b27
  6. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <68222d7b4b72aa321135cd453dac37f00ec41fd1
  7. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <b6d21cf40de103d63ae78551098a7c06af8c98dd
  8. Affected versionversion=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <c71e3a5cffd5309d7f84444df03d5b72600cc417

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <078d5b7500d70af2de6b38e226b03f0b932026a6; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <0c48185a95309556725f818b82120bb74e9c627d; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <54e7a0d111240c92c0f02ceba6eb8f26bf6d6479; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <61c1c98e2607120ce9c3fa1bf75e6da909712b27; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <68222d7b4b72aa321135cd453dac37f00ec41fd1; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <b6d21cf40de103d63ae78551098a7c06af8c98dd; version=9020845fb5d6bb4876a38fdf1259600e7d9a63d4 <c71e3a5cffd5309d7f84444df03d5b72600cc417

Published CVSS scores

7.8NIST NVDCVSS: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 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

CWE-787Out-of-bounds Write
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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