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Fencer Vulns
high 7.5

CVE-2026-15722 json

389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica id parsing

published 2026-07-31 3 mo ago modified 2026-11-04 4 d ago also EUVD-2026-51509

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.

Patch / fix

  • Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 8060020260908152739.0ca98e7e
  • Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 8080020260806114250.f969626e
  • Red Hat Red Hat Directory Server 11.9 for RHEL 8 8100020260803140625.37ed7c03
  • Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 9020020260730155601.1674d574
  • Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 9040020260810131422.1674d574
  • Red Hat Red Hat Enterprise Linux 10 0:3.2.0-9.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.0.6-20.el10_0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.3.11.1-14.el7_9
  • Red Hat Red Hat Enterprise Linux 8 8100020260806150504.25e700aa
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020260803141511.96015a92
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020260803141511.96015a92
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020260806120442.824efc52
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020260806120442.824efc52
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020260806114228.6dbb3803
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020260806114228.6dbb3803
  • Red Hat Red Hat Enterprise Linux 9 0:2.8.0-9.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.2.4-20.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.4.5-27.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.6.1-23.el9_6
  • 389-ds-base RHEL 8 1.4.3.39-26.module+el8.10.0+24634+ded7774b
  • python3-lib389 RHEL 8 1.4.3.39-26.module+el8.10.0+24634+ded7774b
  • 389-ds-base-libs RHEL 8 1.4.3.39-26.module+el8.10.0+24634+ded7774b
  • 389-ds-base-snmp RHEL 8 1.4.3.39-26.module+el8.10.0+24634+ded7774b
  • 389-ds-base-legacy-tools RHEL 8 1.4.3.39-26.module+el8.10.0+24634+ded7774b
  • 389-ds-base directory server 11.9 1.4.3.39-26.module+el8dsrv+24624+a4839c0f
  • cockpit-389-ds directory server 11.9 1.4.3.39-26.module+el8dsrv+24624+a4839c0f
  • python3-lib389 directory server 11.9 1.4.3.39-26.module+el8dsrv+24624+a4839c0f

red hat advisories RHSA-2026:79217RHSA-2026:56050RHSA-2026:56047RHSA-2026:56048RHSA-2026:55794RHSA-2026:55757

  • 389-ds openSUSE Tumbleweed 3.3.1+8c2711bd6-1.1

opensuse advisories openSUSE-SU-2026:11739-1

  • 389-ds-base AlmaLinux 9 2.8.0-9.el9_8
  • python3-lib389 AlmaLinux 9 2.8.0-9.el9_8
  • 389-ds-base-libs AlmaLinux 9 2.8.0-9.el9_8
  • 389-ds-base-snmp AlmaLinux 9 2.8.0-9.el9_8
  • 389-ds-base AlmaLinux 10 3.2.0-9.el10_2
  • python3-lib389 AlmaLinux 10 3.2.0-9.el10_2
  • 389-ds-base-bdb AlmaLinux 10 3.2.0-9.el10_2
  • 389-ds-base-libs AlmaLinux 10 3.2.0-9.el10_2

almalinux advisories ALSA-2026:55423ALSA-2026:55424ALSA-2026:55530

  • 389-ds-base Rocky Linux 10 3.2.0-9.el10_2
  • 389-ds-base Rocky Linux 9 2.8.0-9.el9_8
  • 389-ds-base Rocky Linux 8 1.4.3.39-26.module+el8.10.0+40279+2d6f642b

rocky linux advisories RLSA-2026:55424RLSA-2026:55423RLSA-2026:55530

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-15722 updated cvss 7.5

389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in get_ruvelement_from_berval() via unbounded replica ID parsing

  • Red Hat Directory Server 12 389-ds-base
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 6 389-ds-base, 389-ds-base-libs
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) 389-ds-base-devel 2.6.1-23.el9_6, 389-ds-base-debuginfo 2.6.1-23.el9_6, 389-ds-base-debugsource 2.6.1-23.el9_6, 389-ds-base-libs-debuginfo 2.6.1-23.el9_6, 389-ds-base-snmp-debuginfo 2.6.1-23.el9_6
    fixed: vendor fix RHSA-2026:55426
  • Red Hat Directory Server 11.5 E4S for RHEL 8 389-ds-base 1.4.3.34-9.module+el8dsrv+24847+c94540a6, cockpit-389-ds 1.4.3.34-9.module+el8dsrv+24847+c94540a6, python3-lib389 1.4.3.34-9.module+el8dsrv+24847+c94540a6, 389-ds-base-libs 1.4.3.34-9.module+el8dsrv+24847+c94540a6, 389-ds-base-snmp 1.4.3.34-9.module+el8dsrv+24847+c94540a6, 389-ds-base-legacy-tools 1.4.3.34-9.module+el8dsrv+24847+c94540a6
    fixed: vendor fix RHSA-2026:79217
  • Red Hat Directory Server 11.7 E4S for RHEL 8 389-ds-base 1.4.3.34-17.module+el8dsrv+24648+b4844542, cockpit-389-ds 1.4.3.34-17.module+el8dsrv+24648+b4844542, python3-lib389 1.4.3.34-17.module+el8dsrv+24648+b4844542, 389-ds-base-libs 1.4.3.34-17.module+el8dsrv+24648+b4844542, 389-ds-base-snmp 1.4.3.34-17.module+el8dsrv+24648+b4844542, 389-ds-base-legacy-tools 1.4.3.34-17.module+el8dsrv+24648+b4844542
    fixed: vendor fix RHSA-2026:56047
  • Red Hat Directory Server 11.9 for RHEL 8 389-ds-base 1.4.3.39-26.module+el8dsrv+24624+a4839c0f, cockpit-389-ds 1.4.3.39-26.module+el8dsrv+24624+a4839c0f, python3-lib389 1.4.3.39-26.module+el8dsrv+24624+a4839c0f, 389-ds-base-libs 1.4.3.39-26.module+el8dsrv+24624+a4839c0f, 389-ds-base-snmp 1.4.3.39-26.module+el8dsrv+24624+a4839c0f, 389-ds-base-legacy-tools 1.4.3.39-26.module+el8dsrv+24624+a4839c0f
    fixed: vendor fix RHSA-2026:55532
  • Red Hat Directory Server 12.2 E4S for RHEL 9 389-ds-base 2.2.7-17.module+el9dsrv+24586+9fc9d4dc, cockpit-389-ds 2.2.7-17.module+el9dsrv+24586+9fc9d4dc, python3-lib389 2.2.7-17.module+el9dsrv+24586+9fc9d4dc, 389-ds-base-libs 2.2.7-17.module+el9dsrv+24586+9fc9d4dc, 389-ds-base-snmp 2.2.7-17.module+el9dsrv+24586+9fc9d4dc
    fixed: vendor fix RHSA-2026:56048
  • Red Hat Directory Server 12.4 E4S for RHEL 9 389-ds-base 2.4.5-25.module+el9dsrv+24653+2bc8f722, cockpit-389-ds 2.4.5-25.module+el9dsrv+24653+2bc8f722, python3-lib389 2.4.5-25.module+el9dsrv+24653+2bc8f722, 389-ds-base-libs 2.4.5-25.module+el9dsrv+24653+2bc8f722, 389-ds-base-snmp 2.4.5-25.module+el9dsrv+24653+2bc8f722
    fixed: vendor fix RHSA-2026:56050
show 18 more
  • Red Hat Enterprise Linux AppStream (v. 8) 389-ds-base 1.4.3.39-26.module+el8.10.0+24634+ded7774b, python3-lib389 1.4.3.39-26.module+el8.10.0+24634+ded7774b, 389-ds-base-libs 1.4.3.39-26.module+el8.10.0+24634+ded7774b, 389-ds-base-snmp 1.4.3.39-26.module+el8.10.0+24634+ded7774b, 389-ds-base-legacy-tools 1.4.3.39-26.module+el8.10.0+24634+ded7774b
    fixed: vendor fix RHSA-2026:55530
  • Red Hat Enterprise Linux AppStream (v. 9) 389-ds-base 2.8.0-9.el9_8, python3-lib389 2.8.0-9.el9_8, 389-ds-base-libs 2.8.0-9.el9_8, 389-ds-base-snmp 2.8.0-9.el9_8
    fixed: vendor fix RHSA-2026:55423
  • Red Hat Enterprise Linux AppStream (v. 10) 389-ds-base 3.2.0-9.el10_2, python3-lib389 3.2.0-9.el10_2, 389-ds-base-libs 3.2.0-9.el10_2, 389-ds-base-snmp 3.2.0-9.el10_2
    fixed: vendor fix RHSA-2026:55424
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) 389-ds-base 1.4.3.34-6.module+el8.4.0+24619+217e1084, python3-lib389 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-libs 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-snmp 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-legacy-tools 1.4.3.34-6.module+el8.4.0+24619+217e1084
    fixed: vendor fix RHSA-2026:55757
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) 389-ds-base 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, python3-lib389 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-libs 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-snmp 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-legacy-tools 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
    fixed: vendor fix RHSA-2026:55756
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) 389-ds-base 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, python3-lib389 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-libs 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-snmp 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-legacy-tools 1.4.3.35-20.module+el8.8.0+24646+9b151ec7
    fixed: vendor fix RHSA-2026:55794
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) 389-ds-base 2.2.4-20.el9_2, python3-lib389 2.2.4-20.el9_2, 389-ds-base-libs 2.2.4-20.el9_2
    fixed: vendor fix RHSA-2026:55421
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) 389-ds-base 2.4.5-27.el9_4, python3-lib389 2.4.5-27.el9_4, 389-ds-base-libs 2.4.5-27.el9_4
    fixed: vendor fix RHSA-2026:55422
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) 389-ds-base 3.0.6-20.el10_0, python3-lib389 3.0.6-20.el10_0, 389-ds-base-libs 3.0.6-20.el10_0, 389-ds-base-snmp 3.0.6-20.el10_0
    fixed: vendor fix RHSA-2026:55425
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) 389-ds-base 2.6.1-23.el9_6, python3-lib389 2.6.1-23.el9_6, 389-ds-base-libs 2.6.1-23.el9_6, 389-ds-base-snmp 2.6.1-23.el9_6
    fixed: vendor fix RHSA-2026:55426
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) 389-ds-base 1.4.3.34-6.module+el8.4.0+24619+217e1084, python3-lib389 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-libs 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-snmp 1.4.3.34-6.module+el8.4.0+24619+217e1084, 389-ds-base-legacy-tools 1.4.3.34-6.module+el8.4.0+24619+217e1084
    fixed: vendor fix RHSA-2026:55757
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) 389-ds-base 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, python3-lib389 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-libs 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-snmp 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8, 389-ds-base-legacy-tools 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
    fixed: vendor fix RHSA-2026:55756
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) 389-ds-base 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, python3-lib389 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-libs 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-snmp 1.4.3.35-20.module+el8.8.0+24646+9b151ec7, 389-ds-base-legacy-tools 1.4.3.35-20.module+el8.8.0+24646+9b151ec7
    fixed: vendor fix RHSA-2026:55794
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) 389-ds-base-devel 2.8.0-9.el9_8, 389-ds-base-debuginfo 2.8.0-9.el9_8, 389-ds-base-debugsource 2.8.0-9.el9_8, 389-ds-base-libs-debuginfo 2.8.0-9.el9_8, 389-ds-base-snmp-debuginfo 2.8.0-9.el9_8
    fixed: vendor fix RHSA-2026:55423
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) 389-ds-base-bdb 3.2.0-9.el10_2
    fixed: vendor fix RHSA-2026:55424
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) 389-ds-base-bdb 3.0.6-20.el10_0
    fixed: vendor fix RHSA-2026:55425
  • Red Hat Enterprise Linux Server (v. 7 ELS) 389-ds-base 1.3.11.1-14.el7_9, 389-ds-base-libs 1.3.11.1-14.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) 389-ds-base 1.3.11.1-14.el7_9, 389-ds-base-libs 1.3.11.1-14.el7_9, 389-ds-base-snmp 1.3.11.1-14.el7_9
    fixed: vendor fix RHSA-2026:55758
  • Red Hat Directory Server 13 389-ds-base
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8
  • Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8
  • Red Hat Red Hat Directory Server 11.9 for RHEL 8
  • Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9
  • Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Directory Server 12
  • Red Hat Red Hat Directory Server 13
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.