CVE-2024-23911: Out-of-bounds read vulnerability caused by improper checking of the option length values in IPv6 NDP packets e

Q: How do I fix CVE-2024-23911?

cente ipv6: upgrade to newer than 1.51; cente ipv6 snmpv2: upgrade to newer than 2.30; cente ipv6 snmpv3: upgrade to newer than 2.30. Exact commands for each OS are on this page.

Q: Is CVE-2024-23911 being exploited?

CVE-2024-23911 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-2024-23911 affect?

CVE-2024-23911 affects cente ipv6, cente ipv6 snmpv2, cente ipv6 snmpv3. Severity is high (CVSS 7.5). Out-of-bounds read vulnerability caused by improper checking of the option length values in IPv6 NDP packets exists in Cente middleware TCP/IP Network Series, which may allow an unauthenticated attacker to stop the device operations by send

Q: How urgent is CVE-2024-23911?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2024-23911 is a high-severity flaw (CVSS 7.5) affecting cente ipv6, cente ipv6 snmpv2, cente ipv6 snmpv3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Out-of-bounds read vulnerability caused by improper checking of the option length values in IPv6 NDP packets exists in Cente middleware TCP/IP Network Series, which may allow an unauthenticated attacker to stop the device operations by sending a specially crafted packet.

Why this priority

High severity
Remotely exploitable, no login, no user action

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	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-04-15
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: nxtech

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

Am I affected?

Timeline

2024-04-15 11:15 UTCPublished CVE record published
2026-06-17 07:13 UTCUpdated Record last modified

nxtech cente ipv6 UPGRADE

Affected: <= 1.51

Fixed in: newer than 1.51

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cente-ipv6 || rpm -q cente-ipv6 || cente-ipv6 --version

2. UPGRADE to newer than 1.51 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cente-ipv6

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cente-ipv6

Note

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

nxtech cente ipv6 snmpv2 UPGRADE

Affected: <= 2.30

Fixed in: newer than 2.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cente-ipv6-snmpv2 || rpm -q cente-ipv6-snmpv2 || cente-ipv6-snmpv2 --version

2. UPGRADE to newer than 2.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cente-ipv6-snmpv2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cente-ipv6-snmpv2

Note

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

nxtech cente ipv6 snmpv3 UPGRADE

Affected: <= 2.30

Fixed in: newer than 2.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cente-ipv6-snmpv3 || rpm -q cente-ipv6-snmpv3 || cente-ipv6-snmpv3 --version

2. UPGRADE to newer than 2.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cente-ipv6-snmpv3

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cente-ipv6-snmpv3

Note

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

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-2024-23911?

cente ipv6: upgrade to newer than 1.51; cente ipv6 snmpv2: upgrade to newer than 2.30; cente ipv6 snmpv3: upgrade to newer than 2.30. Exact commands for each OS are on this page.

Is CVE-2024-23911 being exploited?

CVE-2024-23911 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-2024-23911 affect?

CVE-2024-23911 affects cente ipv6, cente ipv6 snmpv2, cente ipv6 snmpv3. Severity is high (CVSS 7.5). Out-of-bounds read vulnerability caused by improper checking of the option length values in IPv6 NDP packets exists in Cente middleware TCP/IP Network Series, which may allow an unauthenticated attacker to stop the device operations by send

How urgent is CVE-2024-23911?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-28957 MEDIUM 5.3 UPGRADE UPGRADE Generation of predictable identifiers issue exists in Cente middleware TCP/IP Network Series
CVE-2024-28894 MEDIUM 5.3 UPGRADE UPGRADE Out-of-bounds read vulnerability caused by improper checking of the option length values in IPv6 headers exist

References

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