CRITICAL

CVE-2024-27280

CVSS v3

9.8

CRITICAL

EPSS Score

2.4 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

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

stringioRubyGemsall versions · fixed in 3.0.1.1
rubyRocky Linux:8all versions · fixed in 0:3.1.5-143.module+el8.10.0+1826+b62220b4
rubyAlmaLinux:9all versions · fixed in 3.0.7-162.el9_4and 4 other packages
rubyAlmaLinux:8all versions · fixed in 2.5.9-112.module_el8.10.0+3871+342e2c2fand 4 other packages
ruby-bundled-gemsAlmaLinux:9all versions · fixed in 3.3.1-2.module_el9.4.0+102+68a93853
ruby-bundled-gemsAlmaLinux:8all versions · fixed in 3.3.1-2.module_el8.10.0+3855+767cb125and 1 other package
rubygem-abrtRocky Linux:8all versions · fixed in 0:0.4.0-1.module+el8.10.0+1679+61871737
rubygem-abrtAlmaLinux:8all versions · fixed in 0.3.0-4.module_el8.10.0+3871+342e2c2fand 1 other package

48 more package ranges on OSV.dev

Vendor advisories

CVE-2024-27280 Red Hat Product Security983 products fixed · 47 known affected
ruby: Buffer overread vulnerability in StringIO
ruby as a component of Red Hat Enterprise Linux 6 · ruby-devel as a component of Red Hat Enterprise Linux 6 · ruby-docs as a component of Red Hat Enterprise Linux 6
RHSA-2024:4499 Red Hat Product Security144 products fixed
Red Hat Security Advisory: ruby security update
RHSA-2024:3838 Red Hat Product Security82 products fixed
Red Hat Security Advisory: ruby security update
RHSA-2024:3671 Red Hat Product Security143 products fixed
Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update
RHSA-2024:3670 Red Hat Product Security146 products fixed
Red Hat Security Advisory: ruby:3.3 security, bug fix, and enhancement update
RHSA-2024:3668 Red Hat Product Security133 products fixed
Red Hat Security Advisory: ruby:3.1 security, bug fix, and enhancement update

2 more advisories

Full record on NVD

Description

A buffer-overread issue was discovered in StringIO 3.0.1, as distributed in Ruby 3.0.x through 3.0.6 and 3.1.x through 3.1.4. The ungetbyte and ungetc methods on a StringIO can read past the end of a string, and a subsequent call to StringIO.gets may return the memory value. 3.0.3 is the main fixed version; however, for Ruby 3.0 users, a fixed version is stringio 3.0.1.1, and for Ruby 3.1 users, a fixed version is stringio 3.0.1.2.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2024-05-14
Last Modified: 2026-04-15

Frequently asked questions

What is CVE-2024-27280?

Is CVE-2024-27280 actively exploited?

Active exploitation of CVE-2024-27280 has not been confirmed. Its EPSS score was 2.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-27280?

CVE-2024-27280 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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