Memory leaks in code handling Diffie-Hellman key exchange via TKEY RRs (OpenSSL 3.0.0+ only)
Published Sep 21, 2022
7.5
HIGHCVSS 3.1
EPSS 2.05%
Description
An attacker can leverage this flaw to gradually erode available memory to the point where named crashes for lack of resources. Upon restart the attacker would have to begin again, but nevertheless there is the potential to deny service.
Affected products
-
- Version Development Branch 9.19 9.19.0 through versions before 9.19.5StatusaffectedConstraints-
- Version Open Source Branch 9.18 9.18.0 through versions before 9.18.7StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
Red Hat Enterprise Linux 6
bind
Not affected
Red Hat Enterprise Linux 7
bind
Not affected
Red Hat Enterprise Linux 8
bind
Not affected
Red Hat Enterprise Linux 8
bind9.16
Not affected
Red Hat Enterprise Linux 9
bind
Not affected
Red Hat Enterprise Linux 9
dhcp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 7 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 8 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 8 | bind9.16 | Not affected | n/a |
| Red Hat Enterprise Linux 9 | bind | Not affected | n/a |
| Red Hat Enterprise Linux 9 | dhcp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to the patched release most closely related to your current version of BIND: BIND 9.18.7 or BIND 9.19.5.
Red Hat statement
This flaw only affects versions BIND-9.18.0 and higher, whereas Red Hat ships BIND-9.16 and lower versions. Therefore, versions of BIND shipped with Red Hat Products are not affected by this flaw.
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.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed May 28, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.05% (0.02051) | 80.54th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.57% (0.01574) | 72.14th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.19% (0.00192) | 38.96th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.13% (0.00126) | 48.88th | v3 (v2023.03.01) |
| May 12, 2024 | 0.13% (0.00126) | 46.93th | v3 (v2023.03.01) |
| Apr 28, 2024 | 0.11% (0.00107) | 42.83th | v3 (v2023.03.01) |
| Mar 3, 2024 | 0.09% (0.00091) | 37.53th | v3 (v2023.03.01) |
| Oct 24, 2023 | 0.08% (0.00082) | 34.21th | v3 (v2023.03.01) |
| Sep 28, 2023 | 0.07% (0.00073) | 30.39th | v3 (v2023.03.01) |
| Aug 22, 2023 | 0.06% (0.00061) | 23.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00051) | 18.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Oct 31, 2022 | 0.95% (0.00954) | 35.12th | v2 (v2022.01.01) |
| Sep 22, 2022 | 0.89% (0.00885) | 26.37th | v2 (v2022.01.01) |
References (7)
- http://www.openwall.com/lists/oss-security/2022/09/21/3 mailing-listMailing ListPatchThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2022-2906 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2128598 Issue Tracking
- https://kb.isc.org/docs/cve-2022-2906 PatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-2906
- https://security.gentoo.org/glsa/202210-25 vendor-advisoryThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2022-2906
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2022/09/21/3 | mailing-listMailing ListPatchThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2022-2906 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2128598 | Issue Tracking | |
| https://kb.isc.org/docs/cve-2022-2906 | PatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-2906 | ||
| https://security.gentoo.org/glsa/202210-25 | vendor-advisoryThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2022-2906 |
Change history (0)
No recorded changes yet.