CVE-2026-3805

use after free in SMB connection reuse

CVE-2026-3805 is fixed in 13 products on 1 platform, first by curl 8.14.1-2ubuntu1.2, released March 11, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0090

59th percentile

This update for curl fixes the following issues: - CVE-2026-1965: bad reuse of HTTP Negotiate connection (bsc#1259362). - CVE-2026-3783: token leak with redirect and netrc (bsc#1259363). - CVE-2026-3784: wrong proxy connection reuse with credentials (bsc#1259364). - CVE-2026-3805: use after free in SMB connection reuse (bsc#1259365).

Where it's fixed

Product	Fixed in	Fix	Released
Linux
curl · Debian 13.5 (trixie)	8.14.1-2+deb13u4	DEBIAN-CVE-2026-3805	Mar 11, 2026
curl · Debian 14	8.19.0-1	DEBIAN-CVE-2026-3805	Mar 11, 2026
curl · Ubuntu 25.10 (questing)	8.14.1-2ubuntu1.2	curl 8.14.1-2ubuntu1.2	Mar 11, 2026
curl · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
curl · opensuse-leap 15.6	8.14.1-150600.4.40.1	SUSE-SU-2026:0885-1	Mar 12, 2026
curl · opensuse-leap 16.0	8.14.1-160000.5.1	OPENSUSE-SU-2026:20404-1	Mar 20, 2026
curl · sles 15.6	8.14.1-150600.4.40.1	SUSE-SU-2026:0885-1	Mar 12, 2026
curl · sles 15.7	8.14.1-150700.7.14.1	SUSE-SU-2026:0903-1	Mar 17, 2026
curl · sles 16.0	8.14.1-160000.5.1	SUSE-SU-2026:20918-1	Mar 20, 2026
curl-debuginfo · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
curl-debugsource · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
curl-mini · sles 16.0	8.14.1-160000.5.1	SUSE-SU-2026:20918-1	Mar 20, 2026
curl-minimal · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
curl-minimal-debuginfo · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl-debuginfo · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl-devel · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl-minimal · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl-minimal-debuginfo · amzn 2023	8.17.0-1.amzn2023.0.3	ALAS2023-2026-1699	May 11, 2026
libcurl3t64-gnutls · Ubuntu 25.10 (questing)	8.14.1-2ubuntu1.2	libcurl3t64-gnutls 8.14.1-2ubuntu1.2	Mar 11, 2026
libcurl4t64 · Ubuntu 25.10 (questing)	8.14.1-2ubuntu1.2	libcurl4t64 8.14.1-2ubuntu1.2	Mar 11, 2026

Details

Published
March 11, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3805

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