CVE-2024-47757

Kernel disclosure or crash via empty NILFS2 root

Published Oct 21, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel NILFS2 implementation allows local users to disclose kernel data or crash the system. nilfs_btree_check_delete() retrieves the maximum key outside the block buffer when a device supplies a B-tree root node with no entries. Exploitation requires a device containing this malformed root state, which mkfs.nilfs2 and NILFS2 do not normally create.

CVSS severity7.1
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

Out-of-bounds read in the Linux kernel NILFS2 implementation allows local users to disclose kernel data or crash the system. nilfs_btree_check_delete() retrieves the maximum key outside the block buffer when a device supplies a B-tree root node with no entries. Exploitation requires a device containing this malformed root state, which mkfs.nilfs2 and NILFS2 do not normally create.

The record

CVE
CVE-2024-47757
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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?

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  1. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <257f9e5185eb6de83377caea686c306e22e871f2
  2. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <a33e967b681e088a125b979975c93e3453e686cd
  3. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <a8abfda768b9f33630cfbc4af6c4214f1e5681b0
  4. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <c4cbcc64bb31e67e02940ce060cc77f7180564cf
  5. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <c4f8554996e8ada3be872dfb8f60e93bcf15fb27
  6. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <d20674f31626e0596ae4c1d9401dfb6739b81b58
  7. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <ed76d381dae125b81d09934e365391a656249da8
  8. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <f3a9859767c7aea758976f5523903d247e585129
  9. Affected versionversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <f9c96351aa6718b42a9f42eaf7adce0356bdb5e8
  10. Affected versionversion=2.6.30

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=17c76b0104e4a6513983777e1a17e0297a12b0c4 <257f9e5185eb6de83377caea686c306e22e871f2; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <a33e967b681e088a125b979975c93e3453e686cd; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <a8abfda768b9f33630cfbc4af6c4214f1e5681b0; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <c4cbcc64bb31e67e02940ce060cc77f7180564cf; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <c4f8554996e8ada3be872dfb8f60e93bcf15fb27; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <d20674f31626e0596ae4c1d9401dfb6739b81b58; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <ed76d381dae125b81d09934e365391a656249da8; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <f3a9859767c7aea758976f5523903d247e585129; version=17c76b0104e4a6513983777e1a17e0297a12b0c4 <f9c96351aa6718b42a9f42eaf7adce0356bdb5e8; version=2.6.30

Published CVSS scores

7.1Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 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-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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