CVE-2012-0870: Heap-based buffer overflow in process.c in smbd in Samba 3.0, as used in the file-sharing service on the Black

Q: How do I fix CVE-2012-0870?

samba: downgrade or apply the listed mitigation; blackberry playbook tablet: mitigate or apply the listed mitigation; blackberry playbook os: upgrade to newer than 2.0. Exact commands for each OS are on this page.

Q: Is CVE-2012-0870 being exploited?

CVE-2012-0870 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-0870 affect?

CVE-2012-0870 affects samba, blackberry playbook tablet, blackberry playbook os. Severity is high (CVSS 7.9). Heap-based buffer overflow in process.c in smbd in Samba 3.0, as used in the file-sharing service on the BlackBerry PlayBook tablet before 2.0.0.7971 and other products, allows remote attackers to cause a denial of service (daemon crash) or

Q: How urgent is CVE-2012-0870?

Priority 51/100. High severity; EPSS top 6%: very likely to be exploited

This month

HIGH 7.9DOWNGRADEMITIGATEUPGRADE

CVE-2012-0870 is a high-severity flaw (CVSS 7.9) affecting samba, blackberry playbook tablet, blackberry playbook os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in process.c in smbd in Samba 3.0, as used in the file-sharing service on the BlackBerry PlayBook tablet before 2.0.0.7971 and other products, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a Batched (aka AndX) request that triggers infinite recursion.

Why this priority

High severity
EPSS top 6%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	7.9 (High)
EPSS exploit chance	6.4% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2012-02-23
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: rim · samba

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-02-23 12:33 UTCPublished CVE record published
2026-06-16 23:38 UTCUpdated Record last modified

samba samba DOWNGRADE

Affected: 3.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.0

1. Check installed version

apt-cache policy samba || rpm -q samba || samba --version

2. No fixed release: DOWNGRADE to a release before 3.0.0 (Debian / Ubuntu)

apt-cache madison samba sudo apt install samba=<VERSION_BEFORE_3.0.0> sudo apt-mark hold samba

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list samba sudo dnf downgrade samba-<VERSION_BEFORE_3.0.0> sudo dnf versionlock add samba

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

rim blackberry playbook tablet MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

rim blackberry playbook os UPGRADE

Affected: <= 2.0 · 1.0 · 1.0.3 · 1.0.5 · 1.0.6 · 1.0.7 · 1.0.7.2942 · 1.0.7.3312

Fixed in: newer than 2.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-0870?

samba: downgrade or apply the listed mitigation; blackberry playbook tablet: mitigate or apply the listed mitigation; blackberry playbook os: upgrade to newer than 2.0. Exact commands for each OS are on this page.

Is CVE-2012-0870 being exploited?

CVE-2012-0870 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-0870 affect?

CVE-2012-0870 affects samba, blackberry playbook tablet, blackberry playbook os. Severity is high (CVSS 7.9). Heap-based buffer overflow in process.c in smbd in Samba 3.0, as used in the file-sharing service on the BlackBerry PlayBook tablet before 2.0.0.7971 and other products, allows remote attackers to cause a denial of service (daemon crash) or

How urgent is CVE-2012-0870?

Priority 51/100. High severity; EPSS top 6%: very likely to be exploited

Software pages

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References

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