CVE-2023-49298

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2023-11-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can be security related in realistic situations. A possible example is cp, from a recent GNU Core Utilities (coreutils) version, when attempting to preserve a rule set for denying unauthorized access. (One might use cp when configuring access control, such as with the /etc/hosts.deny file specified in the IBM Support reference.) NOTE: this issue occurs less often in version 2.2.1, and in versions before 2.1.4, because of the default configuration in those versions.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

November 24, 2023

Last Modified

June 17, 2026

References (23)

Affected Packages

(23 across 11 ecosystems)
Alpine:v3.19(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Alpine:v3.20(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Alpine:v3.21(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Alpine:v3.22(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Alpine:v3.23(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Alpine:v3.24(3)
PackageVulnerable rangeFixed inDependents
zfs—2.2.1-r1—
zfs-lts—2.2.1-r1—
zfs-rpi—2.2.1-r1—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
zfs-linux0.6.5.10-1 ... 0.7.9-3~bpo9+1 (53 versions)0.7.12-2+deb10u3—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
zfs-linux0.6.5.10-1 ... 2.0.3-9~bpo10+1 (106 versions)2.0.3-9+deb11u2—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
zfs-linux0.6.5.10-1 ... 2.1.9-4 (135 versions)2.1.11-1+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
zfs-linux0.6.5.10-1 ... 2.1.9-4 (146 versions)2.1.14-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
zfs-linux0.6.5.10-1 ... 2.1.9-4 (146 versions)2.1.14-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 160 total refreshes for this CVE.

  1. 2026-09-07 15:59 UTCEPSS rescore
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  1. 2026-08-17 01:48 UTCOSV refresh
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  34. 2026-07-23 02:28 UTCEG score recompute
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  74. 2026-06-27 03:07 UTCEPSS rescore
  75. 2026-06-25 13:48 UTCEPSS rescore

Frequently asked(5)

What is CVE-2023-49298?
CVE-2023-49298 is a high vulnerability published on November 24, 2023. OpenZFS through 2.1.13 and 2.2.x through 2.2.1, in certain scenarios involving applications that try to rely on efficient copying of file data, can replace file contents with zero-valued bytes and thus potentially disable security mechanisms. NOTE: this issue is not always security related, but can…
When was CVE-2023-49298 disclosed?
CVE-2023-49298 was first published in the National Vulnerability Database on November 24, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-49298 actively exploited?
CVE-2023-49298 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 35.0% of all scored CVEs.
What is the CVSS score of CVE-2023-49298?
CVE-2023-49298 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2023-49298?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49298, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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