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CVE-2010-4163· NVD / CVE Program· CNA redhat

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 2.6.36.2 allows local users to cause a denial of service (pan

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Fixed version: linux-2.6 (Debian:5.0) 2.6.26-26lenny2; user-mode-linux (Debian:5.0) 2.6.26-1um-2+26lenny2; kernel-rt (Red Hat:enterprise_mrg:1::el5) 0:2.6.33.7-rt29.55.el5rt.

Low priority for now. Upgrade to linux-2.6 (Debian:5.0) 2.6.26-26lenny2; user-mode-linux (Debian:5.0) 2.6.26-1um-2+26lenny2; kernel-rt (Red Hat:enterprise_mrg:1::el5) 0:2.6.33.7-rt29.55.el5rt or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 2.6.36.2 allows local users to cause a denial of service (panic) via a zero-length I/O request in a device ioctl to a SCSI device.

MediumCVSS 4.7 · v2.0—No exploit Fix available
Published
Jan 3, 2011
Updated
Jun 16, 2026
EPSS
0.4% · 32th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
opensuseopensuse
suselinux enterprise desktop
suselinux enterprise real time extension
suselinux enterprise server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 2.6.36.2
  • opensuse opensuse11.2
  • opensuse opensuse11.3
  • suse linux enterprise desktop11
  • suse linux enterprise real time extension11
  • suse linux enterprise server11

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:5.0linux-2.6before 2.6.26-26lenny22.6.26-26lenny2
Debian:5.0user-mode-linuxbefore 2.6.26-1um-2+26lenny22.6.26-1um-2+26lenny2
Red Hat:enterprise_mrg:1::el5kernel-rtbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debugbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debug-debuginfobefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debug-develbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debuginfobefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debuginfo-commonbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-develbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-docbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-tracebefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-trace-debuginfobefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-trace-develbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanillabefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanilla-debuginfobefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanilla-develbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5perfbefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt
Red Hat:enterprise_mrg:1::el5perf-debuginfobefore 0:2.6.33.7-rt29.55.el5rt0:2.6.33.7-rt29.55.el5rt

Same product

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux-2.62.6.26-26lenny2 · Debian:5.0Package registry (OSV)
debian:user-mode-linux2.6.26-1um-2+26lenny2 · Debian:5.0Package registry (OSV)
red hat:kernel-rt0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug-debuginfo0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug-devel0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debuginfo0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debuginfo-common0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-devel0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-doc0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace-debuginfo0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace-devel0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-vanilla0:2.6.33.7-rt29.55.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    none
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    None
    Availability impact
    C

    Weakness class (CWE)

    CWE-20 · Improper Input Validation

    CVSS vector

    AV:L/AC:M/Au:N/C:N/I:N/A:C

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records