CVE-2017-7868: International Components for Unicode (ICU) for C/C++ before 2017-02-13 has an out-of-bounds write caused by a

Q: How do I fix CVE-2017-7868?

international components for unicode: upgrade to newer than 58.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2017-7868 being exploited?

CVE-2017-7868 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-7868 affect?

CVE-2017-7868 affects international components for unicode, debian linux. Severity is high (CVSS 7.5). International Components for Unicode (ICU) for C/C++ before 2017-02-13 has an out-of-bounds write caused by a heap-based buffer overflow related to the utf8TextAccess function in common/utext.cpp and the utext_moveIndex32* function.

Q: How urgent is CVE-2017-7868?

Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

This month

HIGH 7.5REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2017-7868 is a high-severity flaw (CVSS 7.5) affecting international components for unicode, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

International Components for Unicode (ICU) for C/C++ before 2017-02-13 has an out-of-bounds write caused by a heap-based buffer overflow related to the utf8TextAccess function in common/utext.cpp and the utext_moveIndex32* function.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.4% (top 9%)
CISA exploited list	No
Weakness	CWE-787
Published	2017-04-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · icu-project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-04-14 04:59 UTCPublished CVE record published
2026-06-17 01:25 UTCUpdated Record last modified

icu-project international components for unicode UPGRADE

Affected: <= 58.2

Fixed in: newer than 58.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy international-components-for-unicode || rpm -q international-components-for-unicode || international-components-for-unicode --version

2. UPGRADE to newer than 58.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade international-components-for-unicode

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade international-components-for-unicode

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 8.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-7868?

international components for unicode: upgrade to newer than 58.2; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-7868 being exploited?

CVE-2017-7868 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-7868 affect?

CVE-2017-7868 affects international components for unicode, debian linux. Severity is high (CVSS 7.5). International Components for Unicode (ICU) for C/C++ before 2017-02-13 has an out-of-bounds write caused by a heap-based buffer overflow related to the utf8TextAccess function in common/utext.cpp and the utext_moveIndex32* function.

How urgent is CVE-2017-7868?

Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

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CVE-2020-10531 HIGH 8.8 UPGRADE MITIGATE An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1
CVE-2018-18928 CRITICAL 9.8 DOWNGRADE International Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuan
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References

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