Skip to content
Noroxi
NVD / CVE Program· CNA mitre

CVE-2022-48338: An issue was discovered in GNU Emacs through 28.2.

Noroxi assessment

Priority: Monitor (action score 29/100)

  • 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: 1.6% (FIRST EPSS); higher than 76.1% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: emacs (AlmaLinux:9) 1:27.2-8.el9_2.1; emacs-common (AlmaLinux:9) 1:27.2-8.el9_2.1; emacs-filesystem (AlmaLinux:9) 1:27.2-8.el9_2.1.

Low priority for now. Upgrade to emacs (AlmaLinux:9) 1:27.2-8.el9_2.1; emacs-common (AlmaLinux:9) 1:27.2-8.el9_2.1; emacs-filesystem (AlmaLinux:9) 1:27.2-8.el9_2.1 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

An issue was discovered in GNU Emacs through 28.2. In ruby-mode.el, the ruby-find-library-file function has a local command injection vulnerability. The ruby-find-library-file function is an interactive function, and bound to C-c C-f. Inside the function, the external command gem is called through shell-command-to-string, but the feature-name parameters are not escaped. Thus, malicious Ruby source files may cause commands to be executed.

HighCVSS 7.3 · v3.1—No exploit Fix available
Published
Feb 20, 2023
Updated
Jun 17, 2026
EPSS
1.6% · 76th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2022-48338

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for gnu records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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
gnuemacs

Affected versions

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

  • gnu emacsup to 28.2 inclusive

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9emacsbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
AlmaLinux:9emacs-commonbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
AlmaLinux:9emacs-filesystembefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
AlmaLinux:9emacs-lucidbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
AlmaLinux:9emacs-noxbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Debian:11emacsbefore 1:27.1+1-3.1+deb11u21:27.1+1-3.1+deb11u2
Debian:12emacsbefore 1:28.2+1-111:28.2+1-11
openSUSE:Leap 15.4emacsbefore 27.2-150400.3.6.127.2-150400.3.6.1
openSUSE:Tumbleweedemacsbefore 28.2-2.128.2-2.1
Red Hat:enterprise_linux:9::appstreamemacsbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-commonbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-common-debuginfobefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-debuginfobefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-debugsourcebefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-filesystembefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-lucidbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-lucid-debuginfobefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-noxbefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
Red Hat:enterprise_linux:9::appstreamemacs-nox-debuginfobefore 1:27.2-8.el9_2.11:27.2-8.el9_2.1
SUSE:Linux Enterprise Module for Basesystem 15 SP4emacsbefore 27.2-150400.3.6.127.2-150400.3.6.1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2007-6109Stack-based buffer overflow in emacs allows user-assisted attackers to cause a denial of service (application crash) and possibly have unspe
    41Plan
  • CVE-2024-39331In Emacs before 29.4, org-link-expand-abbrev in lisp/ol.el expands a %(...) link abbrev even when it specifies an unsafe function, such as s
    39Monitor
  • CVE-2022-48337GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etag
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2017-1000383Oct 31, 2017 · GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting
    22Monitor
  • ← EarlierCVE-2022-45939Nov 28, 2022 · GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etag
    31Monitor
  • Later →CVE-2022-48339Feb 20, 2023 · An issue was discovered in GNU Emacs through 28.2.
    31Monitor

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
almalinux:emacs1:27.2-8.el9_2.1 · AlmaLinux:9Package registry (OSV)
almalinux:emacs-common1:27.2-8.el9_2.1 · AlmaLinux:9Package registry (OSV)
almalinux:emacs-filesystem1:27.2-8.el9_2.1 · AlmaLinux:9Package registry (OSV)
almalinux:emacs-lucid1:27.2-8.el9_2.1 · AlmaLinux:9Package registry (OSV)
almalinux:emacs-nox1:27.2-8.el9_2.1 · AlmaLinux:9Package registry (OSV)
debian:emacs1:28.2+1-11 · Debian:12Package registry (OSV)
opensuse:emacs27.2-150400.3.6.1 · openSUSE:Leap 15.4Package registry (OSV)
red hat:emacs1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-common1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-common-debuginfo1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-debuginfo1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-debugsource1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-filesystem1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-lucid1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-lucid-debuginfo1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-nox1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:emacs-nox-debuginfo1:27.2-8.el9_2.1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
suse:emacs27.2-150400.3.6.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP4Package 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.

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.
  • A low-privileged account is enough.
  • 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
Low
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

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

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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records