CVE-2024-57850

Kernel memory corruption via unchecked rtime input bounds

Published Jan 11, 2025 · Updated Aug 5, 2026

Out-of-bounds write in Linux JFFS2 allows attackers to corrupt kernel memory by accessing malformed rtime-compressed data. In jffs2_rtime_decompress(), the loop consumes value and repeat bytes without first ensuring that both remain inside the compressed input, while its existing check only bounds output growth. A privileged user or automated process must mount attacker-supplied JFFS2 content; subsequent file access can panic the kernel or support privilege escalation.

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 Linux JFFS2 allows attackers to corrupt kernel memory by accessing malformed rtime-compressed data. In jffs2_rtime_decompress(), the loop consumes value and repeat bytes without first ensuring that both remain inside the compressed input, while its existing check only bounds output growth. A privileged user or automated process must mount attacker-supplied JFFS2 content; subsequent file access can panic the kernel or support privilege escalation.

The record

CVE
CVE-2024-57850
Published
Jan 11, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 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 <421f9e9f0fae9f8e721ffa07f22d9765fa1214d5
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47c9a7f81027a78afea9d2e9a54bfd8fabb6b3d0
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6808a1812a3419542223e7fe9e2de577e99e45d1
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd384b04ad1995441b18fe6c1366d02de8c5d5eb
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dc39b08fcc3831b0bc46add91ba93cd2aab50716
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f6fc251baefc3cdc4f41f2f5a47940d7d4a67332
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe051552f5078fa02d593847529a3884305a6ffe
  8. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <421f9e9f0fae9f8e721ffa07f22d9765fa1214d5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47c9a7f81027a78afea9d2e9a54bfd8fabb6b3d0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6808a1812a3419542223e7fe9e2de577e99e45d1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd384b04ad1995441b18fe6c1366d02de8c5d5eb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dc39b08fcc3831b0bc46add91ba93cd2aab50716; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f6fc251baefc3cdc4f41f2f5a47940d7d4a67332; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe051552f5078fa02d593847529a3884305a6ffe; version=2.6.12

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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