What is CVE-2026-2443?

CVE-2026-2443 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Libsoup: out-of-bounds read in libsoup handle_partial_get() leading to heap information disclosure

Which CVE IDs does CVE-2026-2443 cover?

CVE-2026-2443 covers the following CVE IDs: CVE-2026-2443. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-2443?

CVE-2026-2443 has a CVSS v3 base score of 5.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-2443?

CVE-2026-2443 affects 7 products, including: azl3 libsoup 3.4.4-11 on Azure Linux 3.0; azl3 libsoup 3.4.4-12 on Azure Linux 3.0; azl3 libsoup 3.4.4-14 on Azure Linux 3.0; cbl2 libsoup 3.0.4-10 on CBL Mariner 2.0; cbl2 libsoup 3.0.4-12 on CBL Mariner 2.0; and others — see the full list on the advisory page.

CVE-2026-2443MediumCVSS 5.3

Libsoup: out-of-bounds read in libsoup handle_partial_get() leading to heap information disclosure

Vendor

Microsoft Security Response Center (MSRC)

Published

February 21, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-2443 →

🎯 Affected products7

azl3 libsoup 3.4.4-11 on Azure Linux 3.0
azl3 libsoup 3.4.4-12 on Azure Linux 3.0
azl3 libsoup 3.4.4-14 on Azure Linux 3.0
cbl2 libsoup 3.0.4-10 on CBL Mariner 2.0
cbl2 libsoup 3.0.4-12 on CBL Mariner 2.0
cbl2 libsoup 3.0.4-13 on CBL Mariner 2.0
cbl2 libsoup 3.0.4-13 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 3.4.4-14 KBRelease Notes (Security Update) — fixed build 3.0.4-14 KBCBL-Mariner Releases (Security Update) — fixed build 3.4.4-13 KBCBL-Mariner Releases (Security Update) — fixed build 3.0.4-14

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-2443
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade