CVE-2026-58216
samba: An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) se...
CVE-2026-58216 is fixed in 31 products on 1 platform, first by ctdb 2:4.23.6+dfsg-1ubuntu2.2, released July 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.3
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0046
40th percentile
An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| ctdb · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | ctdb 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| ctdb · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | ctdb 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| ctdb · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | ctdb 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| ldb-tools · Ubuntu 24.04.5 LTS (noble) | 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | ldb-tools 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| ldb-tools · Ubuntu 26.04.1 LTS (resolute) | 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | ldb-tools 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libldb2 · Ubuntu 24.04.5 LTS (noble) | 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | libldb2 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| libldb2 · Ubuntu 26.04.1 LTS (resolute) | 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | libldb2 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libnss-winbind · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | libnss-winbind 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| libnss-winbind · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | libnss-winbind 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| libnss-winbind · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | libnss-winbind 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libpam-winbind · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | libpam-winbind 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| libpam-winbind · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | libpam-winbind 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| libpam-winbind · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | libpam-winbind 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libsmbclient · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | libsmbclient 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| libsmbclient0 · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | libsmbclient0 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| libsmbclient0 · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | libsmbclient0 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libtalloc2 · Ubuntu 26.04.1 LTS (resolute) | 2:2.4.3+samba4.23.6+dfsg-1ubuntu2.2 | libtalloc2 2:2.4.3+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libtdb1 · Ubuntu 26.04.1 LTS (resolute) | 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | libtdb1 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libtevent0t64 · Ubuntu 26.04.1 LTS (resolute) | 2:0.17.1+samba4.23.6+dfsg-1ubuntu2.2 | libtevent0t64 2:0.17.1+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| libwbclient0 · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | libwbclient0 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| libwbclient0 · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | libwbclient0 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| libwbclient0 · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | libwbclient0 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| python3-ldb · Ubuntu 24.04.5 LTS (noble) | 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | python3-ldb 2:2.8.0+samba4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| python3-ldb · Ubuntu 26.04.1 LTS (resolute) | 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | python3-ldb 2:2.11.0+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| python3-samba · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | python3-samba 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| python3-samba · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | python3-samba 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| python3-samba · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | python3-samba 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| python3-talloc · Ubuntu 26.04.1 LTS (resolute) | 2:2.4.3+samba4.23.6+dfsg-1ubuntu2.2 | python3-talloc 2:2.4.3+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| python3-tdb · Ubuntu 26.04.1 LTS (resolute) | 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | python3-tdb 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| registry-tools · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | registry-tools 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| registry-tools · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | registry-tools 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| registry-tools · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | registry-tools 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba · Debian 13.5 (trixie) | 2:4.22.10+dfsg-0+deb13u2 | DEBIAN-CVE-2026-58216 | Jul 31, 2026 |
| samba · Debian 14 | 2:4.24.5+dfsg-1 | DEBIAN-CVE-2026-58216 | Jul 31, 2026 |
| samba · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba · opensuse-leap 16.0 | 4.22.11+git.552.66cfeb7de0a-160000.1.1 | OPENSUSE-SU-2026:21540-1 | Aug 6, 2026 |
| samba · sles 15.6 | 4.19.8+git.501.67274891bc-150600.3.29.1 | SUSE-SU-2026:3364-1 | Jul 28, 2026 |
| samba · sles 15.7 | 4.21.10+git.533.31d7e5508d-150700.3.29.1 | SUSE-SU-2026:3363-1 | Jul 28, 2026 |
| samba · sles 16.0 | 4.22.11+git.552.66cfeb7de0a-160000.1.1 | SUSE-SU-2026:23152-1 | Aug 6, 2026 |
| samba-ad-dc · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-ad-dc 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-ad-dc · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-ad-dc 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-ad-provision · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-ad-provision 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-ad-provision · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-ad-provision 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-common · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-common 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-common · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-common 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-common · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-common 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-common-bin · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-common-bin 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-common-bin · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-common-bin 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-common-bin · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-common-bin 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-dsdb-modules · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-dsdb-modules 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-dsdb-modules · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-dsdb-modules 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-dsdb-modules · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-dsdb-modules 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-libs · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-libs 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-libs · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-libs 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-libs · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-libs 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-testsuite · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-testsuite 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-testsuite · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-testsuite 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-testsuite · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-testsuite 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-vfs-ceph · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-vfs-ceph 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-vfs-glusterfs · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-vfs-glusterfs 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-vfs-modules · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | samba-vfs-modules 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| samba-vfs-modules · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-vfs-modules 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-vfs-modules · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-vfs-modules 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| samba-vfs-modules-extra · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | samba-vfs-modules-extra 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| samba-vfs-modules-extra · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | samba-vfs-modules-extra 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| smbclient · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | smbclient 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| smbclient · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | smbclient 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| smbclient · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | smbclient 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| tdb-tools · Ubuntu 26.04.1 LTS (resolute) | 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | tdb-tools 2:1.4.14+samba4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
| winbind · Ubuntu 22.04.1 LTS (jammy) | 2:4.15.13+dfsg-0ubuntu1.13 | winbind 2:4.15.13+dfsg-0ubuntu1.13 | Jul 31, 2026 |
| winbind · Ubuntu 24.04.5 LTS (noble) | 2:4.19.5+dfsg-4ubuntu9.7 | winbind 2:4.19.5+dfsg-4ubuntu9.7 | Jul 31, 2026 |
| winbind · Ubuntu 26.04.1 LTS (resolute) | 2:4.23.6+dfsg-1ubuntu2.2 | winbind 2:4.23.6+dfsg-1ubuntu2.2 | Jul 28, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.