UBUNTU-CVE-2026-57159

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UBUNTU-CVE-2026-57159

Summary:

Details: PJSIP is a free and open source multimedia communication library written in C. Prior to commit 673b978, a remote out-of-bounds read and write can occur in the SDP negotiator when the remote payload-type map maintenance feature is enabled. assign_pt_and_update_map() in pjmedia/src/pjmedia/sdp_neg.c uses payload-type numbers taken from a remote SDP offer or answer to index fixed-size internal tables without sufficient bounds validation, so a crafted remote SDP can cause memory access outside those tables. The practical impact is memory corruption and denial of service; code execution is not demonstrated. This path is only reached when PJMEDIA_SDP_NEG_MAINTAIN_REMOTE_PT_MAP is enabled. The default is disabled, so default builds are not affected; the feature is an interoperability option that integrating products may enable. This issue has been patched via commit 673b978.

References: https://ubuntu.com/security/CVE-2026-57159, https://www.cve.org/CVERecord?id=CVE-2026-57159, https://github.com/pjsip/pjproject/security/advisories/GHSA-rfwg-w9gq-9mw2