CVE-2023-26604

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2023-03-03. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 7.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less program. This presents a substantial security risk when running systemctl from Sudo, because less executes as root when the terminal size is too small to show the complete systemctl output.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.1%
EPSS %ILE
63rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 3, 2023

Last Modified

June 20, 2025

References (6)

Vendor Advisories for CVE-2023-26604(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsystemd-0:219-78.el7_9.112024-10-07redhat
redhatsystemd-0:239-58.el8_6.132024-03-05redhat
redhatsystemd-0:239-74.el8_8.22023-06-27redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
systemd241-5 ... 241-7~deb10u8 (10 versions)
  • every version up to 241-7~deb10u9: fixed in 241-7~deb10u9
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
systemd—
  • every version up to 247.1-2: fixed in 247.1-2
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
systemd—
  • every version up to 247.1-2: fixed in 247.1-2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
systemd—
  • every version up to 247.1-2: fixed in 247.1-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
systemd—
  • every version up to 247.1-2: fixed in 247.1-2
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 28× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 88 of 179 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 12 repeat rows among the latest 100 are merged into the row they repeat. The 91 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:29 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
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  3. 2026-10-12 18:31 UTCEG score recompute
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  5. 2026-10-11 21:56 UTCEG score recompute
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  17. 2026-09-30 16:19 UTCEG score recompute
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  24. 2026-09-23 19:22 UTCOSV refresh
  25. 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
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  1. 2026-09-22 14:45 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
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  12. 2026-09-04 13:59 UTCOSV refresh
  13. 2026-09-04 13:58 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
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  29. 2026-08-18 01:29 UTCOSV refresh
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  45. 2026-08-02 20:27 UTCOSV refresh
  46. 2026-08-02 02:24 UTCEPSS rescoreEPSS 1.1% · 60th percentile
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  56. 2026-07-23 02:20 UTCEG score recompute
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redhat:RHSA-2024:1105

Frequently asked(5)

What is CVE-2023-26604?
CVE-2023-26604 is a high-severity vulnerability; its CVE record was published on March 3, 2023. systemd before 247 does not adequately block local privilege escalation for some Sudo configurations, e.g., plausible sudoers files in which the "systemctl status" command may be executed. Specifically, systemd does not set LESSSECURE to 1, and thus other programs may be launched from the less…
When was the CVE record for CVE-2023-26604 published?
The CVE record for CVE-2023-26604 was published on March 3, 2023. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 20, 2025; the record at its source may have been updated since.
Is CVE-2023-26604 actively exploited?
CVE-2023-26604 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-26604?
CVE-2023-26604 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2023-26604?
A fix for CVE-2023-26604 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-26604 are linked in the Vendor Advisories panel on this page.

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