CVE-2026-11774: 389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow
Noroxi assessment
Priority: Monitor (action score 30/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.68% (FIRST EPSS); higher than 52.9% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: 389-ds-base (AlmaLinux:10) 3.2.0-8.el10_2; 389-ds-base-bdb (AlmaLinux:10) 3.2.0-8.el10_2; 389-ds-base-devel (AlmaLinux:10) 3.2.0-8.el10_2.
Low priority for now. Upgrade to 389-ds-base (AlmaLinux:10) 3.2.0-8.el10_2; 389-ds-base-bdb (AlmaLinux:10) 3.2.0-8.el10_2; 389-ds-base-devel (AlmaLinux:10) 3.2.0-8.el10_2 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- ALSA-2026:36195
- ALSA-2026:36196
- ALSA-2026:36201
- openSUSE-SU-2026:11600-1
- openSUSE-SU-2026:21691-1
- RHSA-2026:36195
- RHSA-2026:36196
- RHSA-2026:36197
- RHSA-2026:36198
- RHSA-2026:36200
- RHSA-2026:36201
- RHSA-2026:36202
- RHSA-2026:36204
- RHSA-2026:36205
- RHSA-2026:36206
- RHSA-2026:36208
- RHSA-2026:36209
- RHSA-2026:36585
- RHSA-2026:36641
- RHSA-2026:36670
- Published
- Jun 11, 2026
- Updated
- Nov 4, 2026
- EPSS
- 0.6% · 52th percentile
- CWE
- CWE-190
Report tools
Action score
30
Low priority for now.
- CVSS
- 30 / 40 · 7.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 7.6
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| directory server e4s | 11.5 | cpe:2.3:redhat:directory_server_e4s:11.5 |
| directory server e4s | 11.7 | cpe:2.3:redhat:directory_server_e4s:11.7 |
| directory server | 11.9 | cpe:2.3:redhat:directory_server:11.9 |
| directory server e4s | 12.2 | cpe:2.3:redhat:directory_server_e4s:12.2 |
| directory server e4s | 12.4 | cpe:2.3:redhat:directory_server_e4s:12.4 |
| enterprise linux | 10.2 | cpe:2.3:redhat:enterprise_linux:10.2 |
| enterprise linux eus | 10.0 | cpe:2.3:redhat:enterprise_linux_eus:10.0 |
| rhel els | 7 | cpe:2.3:redhat:rhel_els:7 |
| enterprise linux | 8 | cpe:2.3:redhat:enterprise_linux:8 |
| rhel aus | 8.4 | cpe:2.3:redhat:rhel_aus:8.4 |
| rhel eus long life | 8.4 | cpe:2.3:redhat:rhel_eus_long_life:8.4 |
| rhel aus | 8.6 | cpe:2.3:redhat:rhel_aus:8.6 |
and 11 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8
- 8060020260702180044.0ca98e7e and laternot affected · rpm
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8
- 8080020260702180836.f969626e and laternot affected · rpm
Red Hat Red Hat Directory Server 11.9 for RHEL 8
- 8100020260702145313.37ed7c03 and laternot affected · rpm
Red Hat Red Hat Directory Server 12
- all versionsaffected
Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9
- 9020020260703060155.1674d574 and laternot affected · rpm
Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9
- 9040020260703055735.1674d574 and laternot affected · rpm
Red Hat Red Hat Directory Server 13
- all versionsunknown
Red Hat Red Hat Directory Server 13.2
- 1783452100 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10
- 0:3.2.0-8.el10_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- 0:3.0.6-19.el10_0 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
- 0:1.3.11.1-13.el7_9 and laternot affected · rpm
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | 389-ds-base | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:10 | 389-ds-base-bdb | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:10 | 389-ds-base-devel | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:10 | 389-ds-base-libs | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:10 | 389-ds-base-snmp | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:10 | python3-lib389 | before 3.2.0-8.el10_2 | 3.2.0-8.el10_2 |
| AlmaLinux:8 | 389-ds-base | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:8 | 389-ds-base-devel | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:8 | 389-ds-base-legacy-tools | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:8 | 389-ds-base-libs | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:8 | 389-ds-base-snmp | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:8 | python3-lib389 | before 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 |
| AlmaLinux:9 | 389-ds-base | before 2.8.0-8.el9_8 | 2.8.0-8.el9_8 |
| AlmaLinux:9 | 389-ds-base-devel | before 2.8.0-8.el9_8 | 2.8.0-8.el9_8 |
| AlmaLinux:9 | 389-ds-base-libs | before 2.8.0-8.el9_8 | 2.8.0-8.el9_8 |
| AlmaLinux:9 | 389-ds-base-snmp | before 2.8.0-8.el9_8 | 2.8.0-8.el9_8 |
| AlmaLinux:9 | python3-lib389 | before 2.8.0-8.el9_8 | 2.8.0-8.el9_8 |
| Debian:12 | 389-ds-base | from 0 | — |
| openSUSE:Leap 16.0 | 389-ds | before 3.0.6~git382.7a51ea5f5-160000.1.1 | 3.0.6~git382.7a51ea5f5-160000.1.1 |
| openSUSE:Tumbleweed | 389-ds | before 3.2.2+4b41542b2-1.1 | 3.2.2+4b41542b2-1.1 |
| Red Hat:directory_server_e4s:11.5::el8 | 389-ds-base | before 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 | 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 |
| Red Hat:directory_server_e4s:11.5::el8 | 389-ds-base-debuginfo | before 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 | 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 |
| Red Hat:directory_server_e4s:11.5::el8 | 389-ds-base-debugsource | before 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 | 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 |
| Red Hat:directory_server_e4s:11.5::el8 | 389-ds-base-devel | before 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 | 0:1.4.3.34-7.module+el8dsrv+24471+245dd8e2 |
+96
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-3657389-ds-base: potential denial of service via specially crafted kerberos as-req request30Monitor
- CVE-2025-14905389-ds-base: 389-ds-base: remote code execution and denial of service via heap buffer overflow28Monitor
- CVE-2024-5953389-ds-base: malformed userpassword hash may cause denial of service22Monitor
Published before and after this one in the same product
- ← EarlierCVE-2024-2199May 28, 2024 · 389-ds-base: malformed userpassword may cause crash at do_modify in slapd/modify.c22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:389-ds-base | 2.8.0-8.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:389-ds-base-bdb | 3.2.0-8.el10_2 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:389-ds-base-devel | 2.8.0-8.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:389-ds-base-legacy-tools | 1.4.3.39-25.module_el8.10.0+4214+f26e0f43 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:389-ds-base-libs | 2.8.0-8.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:389-ds-base-snmp | 2.8.0-8.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:python3-lib389 | 2.8.0-8.el9_8 · AlmaLinux:9 | Package registry (OSV) |
| opensuse:389-ds | 3.2.2+4b41542b2-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:389-ds-base | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-bdb | 0:3.2.0-8.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:389-ds-base-bdb-debuginfo | 0:3.2.0-8.el10_2 · Red Hat:enterprise_linux:10.2 | Package registry (OSV) |
| red hat:389-ds-base-debuginfo | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-debugsource | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-devel | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::crb | Package registry (OSV) |
| red hat:389-ds-base-legacy-tools | 0:1.4.3.35-19.module+el8.8.0+24470+25f37233 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| red hat:389-ds-base-libs | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-libs-debuginfo | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-snmp | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:389-ds-base-snmp-debuginfo | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:python3-lib389 | 0:2.8.0-8.el9_8 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:389-ds-base | 0:2.8.0-8.el9_8 · Rocky Linux:9 | Package registry (OSV) |
| suse:389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- High
Weakness class (CWE)
CWE-190 · Integer Overflow or WraparoundCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- access.redhat.com/errata/RHSA-2026:36196
- access.redhat.com/errata/RHSA-2026:36197
- access.redhat.com/errata/RHSA-2026:36198
- access.redhat.com/errata/RHSA-2026:36200
- access.redhat.com/errata/RHSA-2026:36201
- access.redhat.com/errata/RHSA-2026:36202
- access.redhat.com/errata/RHSA-2026:36204
- access.redhat.com/errata/RHSA-2026:36205
- access.redhat.com/errata/RHSA-2026:36206
- access.redhat.com/errata/RHSA-2026:36208
- access.redhat.com/errata/RHSA-2026:36209
- access.redhat.com/errata/RHSA-2026:36585
- access.redhat.com/errata/RHSA-2026:36641
- access.redhat.com/errata/RHSA-2026:36660
- access.redhat.com/errata/RHSA-2026:36670
- access.redhat.com/errata/RHSA-2026:36671
- access.redhat.com/security/cve/CVE-2026-11774
- bugzilla.redhat.com/show_bug.cgi?id=2484916
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11774.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.