How severe is CVE-2007-4849?

CVE-2007-4849 has a CVSS 2.0 base score of 4.4, rated medium severity.

Is CVE-2007-4849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4849?

CVE-2007-4849 affects One Laptop Per Child Olpc Linux. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-4849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-4849 published?

CVE-2007-4849 was published on 2007-09-12 and last updated on 2026-06-16.

CVE-2007-4849

CVE-2007-4849 is a medium-severity vulnerability in One Laptop Per Child Olpc Linux with a CVSS 2.0 base score of 4.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.4)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: One Laptop Per Child Olpc Linux
Published: 2007-09-12
Last modified: 2026-06-16

Description

JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.

Frequently asked questions

What is CVE-2007-4849?: JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.
How severe is CVE-2007-4849?: CVE-2007-4849 has a CVSS 2.0 base score of 4.4, rated medium severity.
Is CVE-2007-4849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4849?: CVE-2007-4849 affects One Laptop Per Child Olpc Linux. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-4849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-4849 published?: CVE-2007-4849 was published on 2007-09-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:one_laptop_per_child:olpc_linux:build_542:*:*:*:*:*:*:*

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