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TI-2022-02709 Aliases CVE-2022-2929GHSA-wjcc-8xx5-frqg

DHCP memory leak

Priority LOW 30CWE-770Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

Why it matters now

EPSS 0.00664 51st percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ISCISC DHCP1.0 through versions before 4.1-ESV-R16-P2; 4.2 through versions before 4.4.3.-P1—No fix listedCNA
  • ISC DHCP VendorISC Affected 1.0 through versions before 4.1-ESV-R16-P2; 4.2 through versions before 4.4.3.-P1 Fixed in — No fix listed CNA

CPE configurations NVD · 34

CPEVersionsRoleVendor
cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*1.0.0 to before 4.1-esv; 4.2.0 – 4.4.3VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*4.1-esv r1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*4.1-esv r10VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:*4.1-esv r10_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1:*:*:*:*:*:*4.1-esv r10_rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:*4.1-esv r10b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:*4.1-esv r10rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*4.1-esv r11VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:*4.1-esv r11_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:*4.1-esv r11_rc1VulnerableISC
  • cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:* Versions 1.0.0 to before 4.1-esv; 4.2.0 – 4.4.3 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:* Versions 4.1-esv r1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:* Versions 4.1-esv r10 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:* Versions 4.1-esv r10_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1:*:*:*:*:*:* Versions 4.1-esv r10_rc1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:* Versions 4.1-esv r10b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:* Versions 4.1-esv r10rc1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:* Versions 4.1-esv r11 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:* Versions 4.1-esv r11_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:* Versions 4.1-esv r11_rc1 Vulnerable ·ISC
Show 24 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:*4.1-esv r11_rc2VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:*4.1-esv r11b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:*4.1-esv r11rc1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:*4.1-esv r11rc2VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*4.1-esv r12VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:*4.1-esv r12-p1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:*4.1-esv r12_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1:*:*:*:*:*:*4.1-esv r12_p1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:*4.1-esv r12b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*4.1-esv r13VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r13_b1:*:*:*:*:*:*4.1-esv r13_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:*4.1-esv r13b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*4.1-esv r14VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r14_b1:*:*:*:*:*:*4.1-esv r14_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:*4.1-esv r14b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*4.1-esv r15VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r15-p1:*:*:*:*:*:*4.1-esv r15-p1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r15_b1:*:*:*:*:*:*4.1-esv r15_b1VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r16:*:*:*:*:*:*4.1-esv r16VulnerableISC
cpe:2.3:a:isc:dhcp:4.1-esv:r16-p1:*:*:*:*:*:*4.1-esv r16-p1VulnerableISC
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:* Versions 4.1-esv r11_rc2 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:* Versions 4.1-esv r11b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:* Versions 4.1-esv r11rc1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:* Versions 4.1-esv r11rc2 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:* Versions 4.1-esv r12 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:* Versions 4.1-esv r12-p1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:* Versions 4.1-esv r12_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1:*:*:*:*:*:* Versions 4.1-esv r12_p1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:* Versions 4.1-esv r12b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:* Versions 4.1-esv r13 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r13_b1:*:*:*:*:*:* Versions 4.1-esv r13_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:* Versions 4.1-esv r13b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:* Versions 4.1-esv r14 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r14_b1:*:*:*:*:*:* Versions 4.1-esv r14_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:* Versions 4.1-esv r14b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:* Versions 4.1-esv r15 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r15-p1:*:*:*:*:*:* Versions 4.1-esv r15-p1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r15_b1:*:*:*:*:*:* Versions 4.1-esv r15_b1 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r16:*:*:*:*:*:* Versions 4.1-esv r16 Vulnerable ·ISC
  • cpe:2.3:a:isc:dhcp:4.1-esv:r16-p1:*:*:*:*:*:* Versions 4.1-esv r16-p1 Vulnerable ·ISC
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2023:3000 Released 2023-05-16 · Red Hat rating Moderate
    dhcp security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) dhcp-12:4.3.6-49.el8, dhcp-client-12:4.3.6-49.el8, dhcp-common-12:4.3.6-49.el8 +3
  • RHSA-2023:2502 Released 2023-05-09 · Red Hat rating Moderate
    dhcp security and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 9) dhcp-12:4.4.2-18.b1.el9, dhcp-client-12:4.4.2-18.b1.el9, dhcp-common-12:4.4.2-18.b1.el9 +2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    ISC DHCP — FEDORA-2022-c4f274a54f

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2022-02708 An option refcount overflow exists in dhcpdPriority LOW 30
    Show all 2 records → Advisory →
  • Advisory ·

    ISC DHCP — FEDORA-2022-f5a45757df

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2022-02708 An option refcount overflow exists in dhcpdPriority LOW 30
    Show all 2 records → Advisory →
Show 1 more group
  • Advisory ·

    ISC DHCP — FEDORA-2022-9ca9a94e28

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2022-02708 An option refcount overflow exists in dhcpdPriority LOW 30
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:3000
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:2502

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-2929
  2. 2026-10-03 Alias added: GHSA-wjcc-8xx5-frqg
  3. 2026-10-05 EPSS moved to the 50th–90th percentile

References

Advisory 6

  • TI-2011-00858 dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and… CVSS 2.0HIGH 7.5
  • TI-2017-02364 Failure to properly clean up closed OMAPI connections can exhaust available sockets CVSS 3.1HIGH 7.5
  • TI-2015-07072 ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote… CVSS 3.0MEDIUM 6.5
  • TI-2016-02318 ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the… CVSS 3.1MEDIUM 5.9
  • TI-2009-00661 Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC… CVSS 2.0HIGH 10.0
  • TI-2010-02068 ISC DHCP 4.1 before 4.1.1-P1 and 4.0 before 4.0.2-P1 allows remote attackers to cause a… CVSS 2.0MEDIUM 5.0
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences