NVD / CVE Program· CNA GitHub_M

CVE-2022-39377: sysstat Incorrect Buffer Size calculation on 32-bit systems results in RCE via buffer overflow

Noroxi assessment

Priority: Monitor (action score 31/100)

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: 1.2% (FIRST EPSS); higher than 69.8% of all records.
Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: sysstat sysstat 12.7.1.

Low priority for now. Upgrade to sysstat sysstat 12.7.1 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

Primary sources: NVD · CVE.org · FIRST EPSS

sysstat is a set of system performance tools for the Linux operating system. On 32 bit systems, in versions 9.1.16 and newer but prior to 12.7.1, allocate_structures contains a size_t overflow in sa_common.c. The allocate_structures function insufficiently checks bounds before arithmetic multiplication, allowing for an overflow in the size allocated for the buffer representing system activities. This issue may lead to Remote Code Execution (RCE). This issue has been patched in version 12.7.1.

HighCVSS 7.8 · v3.1—No exploit Fix available

Published: Nov 8, 2022
Updated: Jun 17, 2026
EPSS: 1.2% · 69th percentile
CWE: CWE-120

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.2%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.8
CNA · GitHub_M: 7.0; 0.8 point gap

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

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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.

Vendor	Product	CPE
sysstat project	sysstat	cpe:2.3:a:sysstat_project:sysstat
debian	debian linux	cpe:2.3:o:debian:debian_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora

Affected versions

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

debian debian linux10.0
fedoraproject fedora35
fedoraproject fedora36
fedoraproject fedora37
sysstat project sysstat9.1.6 and later · before 12.6.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

sysstat sysstat
- >= 9.1.16, < 12.7.1affected

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	sysstat	before 11.7.3-9.el8	11.7.3-9.el8
AlmaLinux:9	sysstat	before 12.5.4-5.el9	12.5.4-5.el9
Alpine:v3.21	sysstat	from 9.1.6 · before 12.6.2-r0	12.6.2-r0
Debian:10	sysstat	before 12.0.3-2+deb10u1	12.0.3-2+deb10u1
Debian:11	sysstat	before 12.5.2-2+deb11u1	12.5.2-2+deb11u1
Debian:12	sysstat	before 12.6.1-1	12.6.1-1
openSUSE:Leap Micro 5.5	sysstat	before 12.0.2-150000.3.37.1	12.0.2-150000.3.37.1
openSUSE:Tumbleweed	sysstat	before 12.6.1-2.1	12.6.1-2.1
Red Hat:enterprise_linux:8::appstream	sysstat	before 0:11.7.3-9.el8	0:11.7.3-9.el8
Red Hat:enterprise_linux:8::appstream	sysstat-debuginfo	before 0:11.7.3-9.el8	0:11.7.3-9.el8
Red Hat:enterprise_linux:8::appstream	sysstat-debugsource	before 0:11.7.3-9.el8	0:11.7.3-9.el8
Red Hat:enterprise_linux:9::appstream	sysstat	before 0:12.5.4-5.el9	0:12.5.4-5.el9
Red Hat:enterprise_linux:9::appstream	sysstat-debuginfo	before 0:12.5.4-5.el9	0:12.5.4-5.el9
Red Hat:enterprise_linux:9::appstream	sysstat-debugsource	before 0:12.5.4-5.el9	0:12.5.4-5.el9
SUSE:Linux Enterprise Micro 5.3	sysstat	before 12.0.2-150000.3.37.1	12.0.2-150000.3.37.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5	sysstat	before 12.0.2-20.23.1	12.0.2-20.23.1

Same product

sysstat project: all records

Other highest-scoring records for the same primary product.

CVE-2019-19725sysstat through 12.2.0 has a double free in check_file_actlst in sa_common.c.
40Plan
CVE-2018-19416An issue was discovered in sysstat 12.1.1.
32Monitor
CVE-2023-33204sysstat through 12.7.2 allows a multiplication integer overflow in check_overflow in common.c.
31Monitor

Published before and after this one in the same product

← EarlierCVE-2018-19517Nov 24, 2018 · An issue was discovered in sysstat 12.1.1.
22Monitor
← EarlierCVE-2019-16167Sep 9, 2019 · sysstat before 12.1.6 has memory corruption due to an Integer Overflow in remap_struct() in sa_common.c.
22Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
sysstat sysstat	12.7.1 · description	Vendor (CNA)
almalinux:sysstat	12.5.4-5.el9 · AlmaLinux:9	Package registry (OSV)
alpine:sysstat	12.6.2-r0 · Alpine:v3.21	Package registry (OSV)
debian:sysstat	12.6.1-1 · Debian:12	Package registry (OSV)
opensuse:sysstat	12.0.2-150000.3.37.1 · openSUSE:Leap Micro 5.5	Package registry (OSV)
red hat:sysstat	0:12.5.4-5.el9 · Red Hat:enterprise_linux:9::appstream	Package registry (OSV)
red hat:sysstat-debuginfo	0:12.5.4-5.el9 · Red Hat:enterprise_linux:9::appstream	Package registry (OSV)
red hat:sysstat-debugsource	0:12.5.4-5.el9 · Red Hat:enterprise_linux:9::appstream	Package registry (OSV)
suse:sysstat	12.0.2-150000.3.37.1 · SUSE:Linux Enterprise Micro 5.3	Package registry (OSV)
suse:sysstat	12.0.2-20.23.1 · SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5	Package 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.

No history yet (it accumulates with the daily EPSS job).

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

Someone with local access to the system can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1char buf[256];
2memcpy(buf, pkt->data, pkt->len);

Fixed

1char buf[256];
2if (pkt->len > sizeof(buf)) {
3  return -EINVAL;
4}
5memcpy(buf, pkt->data, pkt->len);

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

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

References

lists.debian.org/debian-lts-announce/2022/11/msg00014.html

Show all references (5 more)

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

All records