389-ds-base: double free of the virtual attribute context in persistent search
Published Feb 18, 2022
7.5
HIGHCVSS 3.1
EPSS 2.01%
Description
A double-free was found in the way 389-ds-base handles virtual attributes context in persistent searches. An attacker could send a series of search requests, forcing the server to behave unexpectedly, and crash.
Affected products
- Vendor n/a Product 389-DS-Base Defaultn/a
- Version 389-ds-base-1.3.10.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | 389-DS-Base | n/a |
|
Configuration 1
- < 1.3.10.2
Configuration 2
- 7
- 7.0
- 7.0
- 7.0
- 7.0
- 7.0
- 7.0
No data.
Red Hat Directory Server 11.3 for RHEL 8
redhat-ds:11-8040020220114174559.d9abee45
Fixed · RHSA-2022:0952
Red Hat Enterprise Linux 7
389-ds-base-0:1.3.10.2-15.el7_9
Fixed · RHSA-2022:0628
Red Hat Enterprise Linux 8
389-ds:1.4-8050020220302180105.4051e825
Fixed · RHSA-2022:0889
Red Hat Enterprise Linux 8.4 Extended Update Support
389-ds:1.4-8040020220323173247.96015a92
Fixed · RHSA-2022:1410
Red Hat Enterprise Linux 6
389-ds-base
Not affected
Red Hat Enterprise Linux 9
389-ds-base
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Directory Server 11.3 for RHEL 8 | redhat-ds:11-8040020220114174559.d9abee45 | Fixed | RHSA-2022:0952 |
| Red Hat Enterprise Linux 7 | 389-ds-base-0:1.3.10.2-15.el7_9 | Fixed | RHSA-2022:0628 |
| Red Hat Enterprise Linux 8 | 389-ds:1.4-8050020220302180105.4051e825 | Fixed | RHSA-2022:0889 |
| Red Hat Enterprise Linux 8.4 Extended Update Support | 389-ds:1.4-8040020220323173247.96015a92 | Fixed | RHSA-2022:1410 |
| Red Hat Enterprise Linux 6 | 389-ds-base | Not affected | n/a |
| Red Hat Enterprise Linux 9 | 389-ds-base | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.01% (0.02014) | 80.21th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.99% (0.01990) | 77.97th | v5 (v2026.06.15) |
| Nov 21, 2025 | 0.24% (0.00236) | 46.39th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.56% (0.01559) | 79.91th | v4 (v2025.03.14) |
| Mar 30, 2025 | 0.42% (0.00419) | 58.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.58% (0.04584) | 81.67th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.42% (0.00419) | 59.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00098) | 42.50th | v3 (v2023.03.01) |
| May 18, 2024 | 0.08% (0.00084) | 35.76th | v3 (v2023.03.01) |
| Aug 1, 2023 | 0.08% (0.00082) | 33.75th | v3 (v2023.03.01) |
| Apr 24, 2023 | 0.07% (0.00074) | 30.10th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00065) | 26.70th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 19, 2022 | 0.89% (0.00885) | 11.03th | v2 (v2022.01.01) |
References (6)
- https://access.redhat.com/security/cve/CVE-2021-4091 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2030307 Issue TrackingPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html mailing-list
- https://lists.debian.org/debian-lts-announce/2025/01/msg00015.html
- https://nvd.nist.gov/vuln/detail/CVE-2021-4091
- https://www.cve.org/CVERecord?id=CVE-2021-4091
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4091 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2030307 | Issue TrackingPatchVendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html | mailing-list | |
| https://lists.debian.org/debian-lts-announce/2025/01/msg00015.html | ||
| https://nvd.nist.gov/vuln/detail/CVE-2021-4091 | ||
| https://www.cve.org/CVERecord?id=CVE-2021-4091 |
Change history (0)
No recorded changes yet.