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Fencer Vulns
high 7.6

CVE-2026-11774 json

389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow

published 2026-06-11 4 mo ago modified 2026-11-04 4 d ago also EUVD-2026-36293

cvss
7.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.

Patch / fix

  • Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 8060020260702180044.0ca98e7e
  • Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 8080020260702180836.f969626e
  • Red Hat Red Hat Directory Server 11.9 for RHEL 8 8100020260702145313.37ed7c03
  • Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 9020020260703060155.1674d574
  • Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 9040020260703055735.1674d574
  • Red Hat Red Hat Enterprise Linux 10 0:3.2.0-8.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.0.6-19.el10_0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.3.11.1-13.el7_9
  • Red Hat Red Hat Enterprise Linux 8 8100020260626120929.25e700aa
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020260629123121.96015a92
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020260629123121.96015a92
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020260626130540.824efc52
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020260626130540.824efc52
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020260630025241.6dbb3803
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020260630025241.6dbb3803
  • Red Hat Red Hat Enterprise Linux 9 0:2.8.0-8.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.2.4-19.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.4.5-26.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.6.1-22.el9_6
  • Red Hat Red Hat Directory Server 13.2 1783452100
  • 389-ds-base directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • cockpit-389-ds directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • python3-lib389 directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • 389-ds-base-libs directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • 389-ds-base-snmp directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • 389-ds-base-legacy-tools directory server 11.9 1.4.3.39-25.module+el8dsrv+24463+e272972e
  • 389-ds-base RHEL 8 1.4.3.39-25.module+el8.10.0+24462+1b66c107
  • python3-lib389 RHEL 8 1.4.3.39-25.module+el8.10.0+24462+1b66c107

red hat advisories RHSA-2026:36671RHSA-2026:36670RHSA-2026:36641RHSA-2026:36585RHSA-2026:36208RHSA-2026:36209

  • 389-ds SLES for SAP applications 16.0, SLES 16.0 3.0.6~git382.7a51ea5f5-160000.1.1
  • 389-ds SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 2.2.10~git272.fd28f95da-150500.3.51.1
  • 389-ds SLE Module for Server Applications 15 SP7 2.7.0~git234.0afa2e38b-150700.3.22.1
  • 389-ds SLE Module for Server Applications 15 SP7 2.7.0~git212.9b0755edb-150700.3.19.1
  • 389-ds SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 2.2.10~git255.752643c78-150500.3.48.1
  • 389-ds SLES for SAP 15 SP6, SLES 15 SP6-LTSS 2.2.10~git272.fd28f95da-150600.8.35.1
  • 389-ds SLES for SAP 15 SP6, SLES 15 SP6-LTSS 2.2.10~git255.752643c78-150600.8.32.1

suse advisories SUSE-SU-2026:23574-1SUSE-SU-2026:3687-1SUSE-SU-2026:3686-1SUSE-SU-2026:3678-1SUSE-SU-2026:3138-1SUSE-SU-2026:3137-1

  • 389-ds openSUSE Leap 16.0 3.0.6~git382.7a51ea5f5-160000.1.1
  • 389-ds openSUSE Tumbleweed 3.2.2+4b41542b2-1.1

opensuse advisories openSUSE-SU-2026:21691-1openSUSE-SU-2026:11600-1

  • 389-ds-base AlmaLinux 9 2.8.0-8.el9_8
  • python3-lib389 AlmaLinux 9 2.8.0-8.el9_8
  • 389-ds-base-libs AlmaLinux 9 2.8.0-8.el9_8
  • 389-ds-base-snmp AlmaLinux 9 2.8.0-8.el9_8
  • 389-ds-base AlmaLinux 10 3.2.0-8.el10_2
  • python3-lib389 AlmaLinux 10 3.2.0-8.el10_2
  • 389-ds-base-bdb AlmaLinux 10 3.2.0-8.el10_2
  • 389-ds-base-libs AlmaLinux 10 3.2.0-8.el10_2

almalinux advisories ALSA-2026:36195ALSA-2026:36196ALSA-2026:36201

  • 389-ds-base Rocky Linux 8 1.4.3.39-25.module+el8.10.0+40233+16963435
  • 389-ds-base Rocky Linux 10 3.2.0-8.el10_2
  • 389-ds-base Rocky Linux 9 2.8.0-8.el9_8

rocky linux advisories RLSA-2026:36201RLSA-2026:36196RLSA-2026:36195

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-2026-11774 updated cvss 7.6

389-ds-base: 389-ds-base: integer overflow in SASL packet length bypasses size limit leading to heap buffer overflow

  • Red Hat Directory Server 12 389-ds-base 2.2.7-14.module+el9dsrv+24059+d750c81f
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) 389-ds-base-devel 2.6.1-22.el9_6, 389-ds-base-debuginfo 2.6.1-22.el9_6, 389-ds-base-debugsource 2.6.1-22.el9_6, 389-ds-base-libs-debuginfo 2.6.1-22.el9_6, 389-ds-base-snmp-debuginfo 2.6.1-22.el9_6
    fixed: vendor fix RHSA-2026:36671
  • Red Hat Directory Server 11.5 E4S for RHEL 8 389-ds-base 1.4.3.34-7.module+el8dsrv+24471+245dd8e2, cockpit-389-ds 1.4.3.34-7.module+el8dsrv+24471+245dd8e2, python3-lib389 1.4.3.34-7.module+el8dsrv+24471+245dd8e2, 389-ds-base-libs 1.4.3.34-7.module+el8dsrv+24471+245dd8e2, 389-ds-base-snmp 1.4.3.34-7.module+el8dsrv+24471+245dd8e2, 389-ds-base-legacy-tools 1.4.3.34-7.module+el8dsrv+24471+245dd8e2
    fixed: vendor fix RHSA-2026:36204
  • Red Hat Directory Server 11.7 E4S for RHEL 8 389-ds-base 1.4.3.34-16.module+el8dsrv+24461+e76d504b, cockpit-389-ds 1.4.3.34-16.module+el8dsrv+24461+e76d504b, python3-lib389 1.4.3.34-16.module+el8dsrv+24461+e76d504b, 389-ds-base-libs 1.4.3.34-16.module+el8dsrv+24461+e76d504b, 389-ds-base-snmp 1.4.3.34-16.module+el8dsrv+24461+e76d504b, 389-ds-base-legacy-tools 1.4.3.34-16.module+el8dsrv+24461+e76d504b
    fixed: vendor fix RHSA-2026:36208
  • Red Hat Directory Server 11.9 for RHEL 8 389-ds-base 1.4.3.39-25.module+el8dsrv+24463+e272972e, cockpit-389-ds 1.4.3.39-25.module+el8dsrv+24463+e272972e, python3-lib389 1.4.3.39-25.module+el8dsrv+24463+e272972e, 389-ds-base-libs 1.4.3.39-25.module+el8dsrv+24463+e272972e, 389-ds-base-snmp 1.4.3.39-25.module+el8dsrv+24463+e272972e, 389-ds-base-legacy-tools 1.4.3.39-25.module+el8dsrv+24463+e272972e
    fixed: vendor fix RHSA-2026:36200
  • Red Hat Directory Server 12.2 E4S for RHEL 9 389-ds-base 2.2.7-16.module+el9dsrv+24460+990bd826, cockpit-389-ds 2.2.7-16.module+el9dsrv+24460+990bd826, python3-lib389 2.2.7-16.module+el9dsrv+24460+990bd826, 389-ds-base-libs 2.2.7-16.module+el9dsrv+24460+990bd826, 389-ds-base-snmp 2.2.7-16.module+el9dsrv+24460+990bd826
    fixed: vendor fix RHSA-2026:36641
  • Red Hat Directory Server 12.4 E4S for RHEL 9 389-ds-base 2.4.5-24.module+el9dsrv+24459+87716c2d, cockpit-389-ds 2.4.5-24.module+el9dsrv+24459+87716c2d, python3-lib389 2.4.5-24.module+el9dsrv+24459+87716c2d, 389-ds-base-libs 2.4.5-24.module+el9dsrv+24459+87716c2d, 389-ds-base-snmp 2.4.5-24.module+el9dsrv+24459+87716c2d
    fixed: vendor fix RHSA-2026:36209
  • Red Hat Directory Server 13.2 dirsrv/dirsrv-container-rhel10 1783452100
    fixed: vendor fix RHSA-2026:36660
show 18 more
  • Red Hat Enterprise Linux AppStream (v. 8) 389-ds-base 1.4.3.39-25.module+el8.10.0+24462+1b66c107, python3-lib389 1.4.3.39-25.module+el8.10.0+24462+1b66c107, 389-ds-base-libs 1.4.3.39-25.module+el8.10.0+24462+1b66c107, 389-ds-base-snmp 1.4.3.39-25.module+el8.10.0+24462+1b66c107, 389-ds-base-legacy-tools 1.4.3.39-25.module+el8.10.0+24462+1b66c107
    fixed: vendor fix RHSA-2026:36201
  • Red Hat Enterprise Linux AppStream (v. 9) 389-ds-base 2.8.0-8.el9_8, python3-lib389 2.8.0-8.el9_8, 389-ds-base-libs 2.8.0-8.el9_8, 389-ds-base-snmp 2.8.0-8.el9_8
    fixed: vendor fix RHSA-2026:36195
  • Red Hat Enterprise Linux AppStream (v. 10) 389-ds-base 3.2.0-8.el10_2, python3-lib389 3.2.0-8.el10_2, 389-ds-base-libs 3.2.0-8.el10_2, 389-ds-base-snmp 3.2.0-8.el10_2
    fixed: vendor fix RHSA-2026:36196
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) 389-ds-base 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, python3-lib389 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-libs 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-snmp 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-legacy-tools 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41
    fixed: vendor fix RHSA-2026:36206
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) 389-ds-base 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, python3-lib389 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-libs 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-snmp 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-legacy-tools 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a
    fixed: vendor fix RHSA-2026:36202
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) 389-ds-base 1.4.3.35-19.module+el8.8.0+24470+25f37233, python3-lib389 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-libs 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-snmp 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-legacy-tools 1.4.3.35-19.module+el8.8.0+24470+25f37233
    fixed: vendor fix RHSA-2026:36197
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) 389-ds-base 2.2.4-19.el9_2, python3-lib389 2.2.4-19.el9_2, 389-ds-base-libs 2.2.4-19.el9_2
    fixed: vendor fix RHSA-2026:36585
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) 389-ds-base 2.4.5-26.el9_4, python3-lib389 2.4.5-26.el9_4, 389-ds-base-libs 2.4.5-26.el9_4
    fixed: vendor fix RHSA-2026:36198
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) 389-ds-base 3.0.6-19.el10_0, python3-lib389 3.0.6-19.el10_0, 389-ds-base-libs 3.0.6-19.el10_0, 389-ds-base-snmp 3.0.6-19.el10_0
    fixed: vendor fix RHSA-2026:36670
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) 389-ds-base 2.6.1-22.el9_6, python3-lib389 2.6.1-22.el9_6, 389-ds-base-libs 2.6.1-22.el9_6, 389-ds-base-snmp 2.6.1-22.el9_6
    fixed: vendor fix RHSA-2026:36671
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) 389-ds-base 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, python3-lib389 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-libs 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-snmp 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41, 389-ds-base-legacy-tools 1.4.3.34-5.module+el8.4.0+24472+7ce5ce41
    fixed: vendor fix RHSA-2026:36206
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) 389-ds-base 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, python3-lib389 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-libs 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-snmp 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a, 389-ds-base-legacy-tools 1.4.3.34-10.module+el8.6.0+24464+c3b0cd7a
    fixed: vendor fix RHSA-2026:36202
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) 389-ds-base 1.4.3.35-19.module+el8.8.0+24470+25f37233, python3-lib389 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-libs 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-snmp 1.4.3.35-19.module+el8.8.0+24470+25f37233, 389-ds-base-legacy-tools 1.4.3.35-19.module+el8.8.0+24470+25f37233
    fixed: vendor fix RHSA-2026:36197
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) 389-ds-base-devel 2.8.0-8.el9_8, 389-ds-base-debuginfo 2.8.0-8.el9_8, 389-ds-base-debugsource 2.8.0-8.el9_8, 389-ds-base-libs-debuginfo 2.8.0-8.el9_8, 389-ds-base-snmp-debuginfo 2.8.0-8.el9_8
    fixed: vendor fix RHSA-2026:36195
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) 389-ds-base-bdb 3.2.0-8.el10_2
    fixed: vendor fix RHSA-2026:36196
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) 389-ds-base-bdb 3.0.6-19.el10_0
    fixed: vendor fix RHSA-2026:36670
  • Red Hat Enterprise Linux Server (v. 7 ELS) 389-ds-base 1.3.11.1-13.el7_9, 389-ds-base-libs 1.3.11.1-13.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) 389-ds-base 1.3.11.1-13.el7_9, 389-ds-base-libs 1.3.11.1-13.el7_9, 389-ds-base-snmp 1.3.11.1-13.el7_9
    fixed: vendor fix RHSA-2026:36205
  • Red Hat Directory Server 13 389-ds-base 3.2.0-5.el10dsrv Red Hat Enterprise Linux 6 389-ds-base, 389-ds-base-libs, 389-ds-base 3.2.0-5.el10dsrv
    not affected: vulnerable code 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
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.68% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
CISA ADP 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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 13.2
  • Red Hat Red Hat Directory Server 12
  • Red Hat Red Hat Directory Server 13
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.