CVE-2024-49999

Local system crash via null server dereference

Published Oct 21, 2024 · Updated Aug 5, 2026

NULL pointer dereference in the Linux kernel AFS client allows remote attackers to crash the system during file-server operations. After discarding an aborted or incomplete server response, afs_wait_for_operation() can leave op->server unset and dereference it while recording the responding-server flag. Reachability requires an active AFS operation and a server response that is discarded after an abort or incomplete transfer; the reported consequence is a kernel crash.

CVSS severity7.5
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel AFS client allows remote attackers to crash the system during file-server operations. After discarding an aborted or incomplete server response, afs_wait_for_operation() can leave op->server unset and dereference it while recording the responding-server flag. Reachability requires an active AFS operation and a server response that is discarded after an abort or incomplete transfer; the reported consequence is a kernel crash.

The record

CVE
CVE-2024-49999
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.8
  2. Affected versionversion=98f9fda2057ba34b720c4d353351024d6dcee90f <3d51ab44123f35dd1d646d99a15ebef10f55e263
  3. Affected versionversion=98f9fda2057ba34b720c4d353351024d6dcee90f <97c953572d98080c5f1486155350bb688041747a
  4. Affected versionversion=98f9fda2057ba34b720c4d353351024d6dcee90f <ff98751bae40faed1ba9c6a7287e84430f7dec64

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=98f9fda2057ba34b720c4d353351024d6dcee90f <3d51ab44123f35dd1d646d99a15ebef10f55e263; version=98f9fda2057ba34b720c4d353351024d6dcee90f <97c953572d98080c5f1486155350bb688041747a; version=98f9fda2057ba34b720c4d353351024d6dcee90f <ff98751bae40faed1ba9c6a7287e84430f7dec64

Published CVSS scores

7.5Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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