CVE-2009-0748: linux linux_kernel Improper Input Validation

Modified

Published 27-02-2009Last modified 07-08-2024

Vulnerability summary

CVE-2009-0748 is a medium (CVSS 4.9) Improper Input Validation vulnerability in linux linux_kernel. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 43.7% of scored vulnerabilities. 1 public exploit is recorded.

Priority

Routine

Not severe (CVSS 4.9, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

4.9/10

010

Medium · v2.0 (NVD)

EPSS score

0.51%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 2

DSA-1749-1 RHSA-2009:1243

Timeline

27-02-2009
PublishedVulnerability first disclosed.
07-08-2024
Last modifiedVulnerability information updated.

Description

The ext4_fill_super function in fs/ext4/super.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not validate the superblock configuration, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) by attempting to mount a crafted ext4 filesystem.

CVSS metrics

1 score · 1 source · 1 version

v2.04.9

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.51% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

referenceUnverified
Exploit Reference (bugzilla.kernel.org)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected systems

Version check

Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.

Linux1 product

linux_kernel2.6.27 | 2.6.27:rc1 | 2.6.27:rc2 | 2.6.27:rc3 | 2.6.27:rc4 | 2.6.27:rc5 | 2.6.27:rc6 | 2.6.27:rc7 | 2.6.27:rc8 | 2.6.27:rc9 | 2.6.27.1 | 2.6.27.2 | 2.6.27.3 | 2.6.27.4 | 2.6.27.5 | 2.6.27.6 | 2.6.27.7 | 2.6.27.8 | 2.6.27.9 | 2.6.27.10 | 2.6.27.11 | 2.6.27.12 | 2.6.27.13 | 2.6.27.14 | 2.6.27.15 | 2.6.27.16 | 2.6.27.17 | 2.6.27.18 | 2.6.28 | 2.6.28:rc1 | 2.6.28:rc2 | 2.6.28:rc3 | 2.6.28:rc4 | 2.6.28:rc5 | 2.6.28:rc6 | 2.6.28:rc7 | 2.6.28.1 | 2.6.28.2 | 2.6.28.3 | 2.6.28.4 | 2.6.28.5 | 2.6.28.6

1 vendor · 1 product

References

17 links

oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8526VDB EntrySignatureX Refsource OVAL
kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19X Refsource CONFIRM
bugzilla.kernel.org/show_bug.cgi?id=12371X Refsource CONFIRMExploit
www.vupen.com/english/advisories/2009/0509VDB EntryX Refsource VUPENVendor Advisory
secunia.com/advisories/37471Third Party AdvisoryX Refsource SECUNIA
rhn.redhat.com/errata/RHSA-2009-1243.htmlVendor AdvisoryX Refsource REDHAT
www.vmware.com/security/advisories/VMSA-2009-0016.htmlX Refsource CONFIRM
www.debian.org/security/2009/dsa-1749Vendor AdvisoryX Refsource DEBIAN
www.ubuntu.com/usn/usn-751-1Vendor AdvisoryX Refsource UBUNTU
git.kernel.orgX Refsource CONFIRM

Show all 17 references

www.securityfocus.com/archive/1/507985/100/0/threadedMailing ListX Refsource BUGTRAQ
osvdb.org/52203VDB EntryX Refsource OSVDB
secunia.com/advisories/36562Third Party AdvisoryX Refsource SECUNIA
secunia.com/advisories/34394Third Party AdvisoryX Refsource SECUNIA
kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7X Refsource CONFIRM
www.vupen.com/english/advisories/2009/3316VDB EntryX Refsource VUPEN
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10683VDB EntrySignatureX Refsource OVAL