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No exploitation reportedFix available

CVE-2023-42465

No exploitation reported by the sources we read.

  • Published2023-12-22
  • Fixed in1.9.15

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Sudo before 1.9.15 might allow row hammer attacks (for authentication bypass or privilege escalation) because application logic sometimes is based on not equaling an error value (instead of equaling a success value), and because the values do not resist flips of a single bit.

Timeline

dates in UTC
  1. 2023-12-2216:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-42465?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-42465?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Sudo project sudo
BranchAffectedFixed in
1.9< 1.9.151.9.15

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • sudoAlmaLinux:9all versions · fixed in 1.9.5p2-10.el9_3and 1 other package

Vendor advisories

  • CVE-2023-42465 Red Hat Product Security254 products fixed · 6 known affected

    sudo: Targeted Corruption of Register and Stack Variables

    sudo as a component of Red Hat Enterprise Linux 6 · sudo-devel as a component of Red Hat Enterprise Linux 6 · sudo.src as a component of Red Hat Enterprise Linux 6 · +3 more

  • RHSA-2024:1383 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.15.0 security, enhancement, & bug fix update

  • RHSA-2024:0811 Red Hat Product Security138 products fixed

    Red Hat Security Advisory: sudo security update

Full record on NVD

Fix

  1. Update Sudo project sudo to 1.9.15
  2. Vendor fix Red Hat Product Security RHSA-2024:1383 · 89 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2024:0811 · 138 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. Workaround from the vendor Red Hat Product Security RHSA-2024:1383 · 89 productsIn general to address this issue, it's crucial to implement robust logic that prevents unintended execution from a single-bit flip. But mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and…
  5. No fix planned, says the vendor Red Hat Product Security CVE-2023-42465 · 6 productsOut of support scope

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17read 2026-10-23
  • FIRST EPSSEPSS score0.5 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2023-12-22
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-42465?

Sudo before 1.9.15 might allow row hammer attacks (for authentication bypass or privilege escalation) because application logic sometimes is based on not equaling an error value (instead of equaling a success value), and because the values do not resist flips of a single bit.

Is CVE-2023-42465 actively exploited?

Active exploitation of CVE-2023-42465 has not been confirmed. Its EPSS score was 0.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-42465?

CVE-2023-42465 has a CVSS v3 base score of 7 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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