CVE-2026-57162: PJSIP is a free and open source multimedia communication library written in C

Q: How do I fix CVE-2026-57162?

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

Q: Is CVE-2026-57162 being exploited?

CVE-2026-57162 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-2026-57162 affect?

CVE-2026-57162 affects pjsip. Severity is critical (CVSS 9.1). PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attributes during SDP offer/answer (sdes_encode

Q: How urgent is CVE-2026-57162?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-57162 is a critical-severity flaw (CVSS 9.1) 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. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attributes during SDP offer/answer (sdes_encode_sdp() in transport_srtp_sdes.c). This affects applications with SRTP enabled (use_srtp optional or mandatory, using SDES keying). During media negotiation, the crypto attributes from the remote SDP are collect

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-09-04
Last modified	2026-09-11

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

Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-04 18:17 UTCPublished CVE record published
2026-09-11 15:51 UTCUpdated Record last modified

teluu pjsip UPGRADE

Affected: <= 2.17

Fixed in: newer than 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 newer than 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-2026-57162?

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

Is CVE-2026-57162 being exploited?

CVE-2026-57162 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-2026-57162 affect?

CVE-2026-57162 affects pjsip. Severity is critical (CVSS 9.1). PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attributes during SDP offer/answer (sdes_encode

How urgent is CVE-2026-57162?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-40892 CRITICAL 9.8 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-41415 CRITICAL 9.1 UPGRADE PJSIP is a free and open source multimedia communication library written in C
CVE-2026-40614 HIGH 8.8 UPGRADE PJSIP is a free and open source multimedia communication library written in C
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

References

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