CVE-2026-40614: PJSIP is a free and open source multimedia communication library written in C

Q: How do I fix CVE-2026-40614?

pjsip: upgrade to 2.17. Exact commands for each OS are on this page.

Q: Is CVE-2026-40614 being exploited?

CVE-2026-40614 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-2026-40614 affect?

CVE-2026-40614 affects pjsip. Severity is high (CVSS 8.8). PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC

Routine

HIGH 8.8UPGRADE

CVE-2026-40614 is a high-severity flaw (CVSS 8.8) affecting pjsip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC decode buffers (dec_frame[].buf) were allocated based on a PCM-derived formula: (sample_rate/1000) * 60 * channel_cnt * 2. At 8 kHz mono this yields only 960 bytes, but codec_parse() can output encoded frames

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-122
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: pjsip

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 19:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

pjsip pjsip UPGRADE

Affected: < 2.17

Fixed in: 2.17

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.17 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pjsip

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-2026-40614?

pjsip: upgrade to 2.17. Exact commands for each OS are on this page.

Is CVE-2026-40614 being exploited?

CVE-2026-40614 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-2026-40614 affect?

CVE-2026-40614 affects pjsip. Severity is high (CVSS 8.8). PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a buffer overflow when decoding Opus audio frames due to insufficient buffer size validation in the Opus codec decode path. The FEC

How urgent is CVE-2026-40614?

Priority 34/100. High severity

Related CVEs

CVE-2026-40892 CRITICAL 9.8 UPGRADE PJSIP is a free and open source multimedia communication library written in C
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CVE-2026-42225 MEDIUM 5.9 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-41416 HIGH 7.5 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-84975 HIGH 7.4 UPGRADE PJSIP is a free and open source multimedia communication library written in C

References

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