CVE-2023-30463: Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer

Q: How do I fix CVE-2023-30463?

picotcp: upgrade to newer than 1.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-30463 being exploited?

CVE-2023-30463 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-2023-30463 affect?

CVE-2023-30463 affects picotcp. Severity is high (CVSS 7.5). Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow in pico_ipv6_alloc when processing large ICMPv6 packets. This affects installations with Ethernet support in which a pac

Q: How urgent is CVE-2023-30463?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2023-30463 is a high-severity flaw (CVSS 7.5) affecting picotcp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow in pico_ipv6_alloc when processing large ICMPv6 packets. This affects installations with Ethernet support in which a packet size greater than 65495 may occur.

Why this priority

High severity
Public exploit reference
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	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-190
Published	2023-04-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: altran

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

Am I affected?

Timeline

2023-04-19 12:15 UTCPublished CVE record published
2026-06-17 05:54 UTCUpdated Record last modified

altran picotcp UPGRADE

Affected: <= 1.7.0

Fixed in: newer than 1.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy picotcp || rpm -q picotcp || picotcp --version

2. UPGRADE to newer than 1.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade picotcp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade picotcp

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-2023-30463?

picotcp: upgrade to newer than 1.7.0. Exact commands for each OS are on this page.

Is CVE-2023-30463 being exploited?

CVE-2023-30463 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-2023-30463 affect?

CVE-2023-30463 affects picotcp. Severity is high (CVSS 7.5). Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow in pico_ipv6_alloc when processing large ICMPv6 packets. This affects installations with Ethernet support in which a pac

How urgent is CVE-2023-30463?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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