6.5

CVE-2022-2928: debian debian_linux NULL Pointer Dereference

CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2022-2928UBUNTU-CVE-2022-2928DEBIAN-CVE-2022-2928
Published 07-10-2022Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2022-2928 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.7% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.71%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 6
DLA-3146-1DSA-5251-1MGASA-2022-0374OPENSUSE-SU-2024:12390-1RHSA-2023:2502RHSA-2023:3000

Timeline

  1. 07-10-2022
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.71%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.03 pp

From 0.69% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.71%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Isc2 products
  • dhcp≥ 4.4.0, ≤ 4.4.3 | 4.1-esv:r1 | 4.1-esv:r10 | 4.1-esv:r10_b1 | 4.1-esv:r10_rc1 | 4.1-esv:r10b1 | 4.1-esv:r10rc1 | 4.1-esv:r11 | 4.1-esv:r11_b1 | 4.1-esv:r11_rc1 | 4.1-esv:r11_rc2 | 4.1-esv:r11b1 | 4.1-esv:r11rc1 | 4.1-esv:r11rc2 | 4.1-esv:r12 | 4.1-esv:r12-p1 | 4.1-esv:r12_b1 | 4.1-esv:r12_p1 | 4.1-esv:r12b1 | 4.1-esv:r13 | 4.1-esv:r13_b1 | 4.1-esv:r13b1 | 4.1-esv:r14 | 4.1-esv:r14_b1 | 4.1-esv:r14b1 | 4.1-esv:r15 | 4.1-esv:r15-p1 | 4.1-esv:r15_b1 | 4.1-esv:r16 | 4.1-esv:r16-p1
  • isc dhcpEOL4.4.0 through versions before 4.4.3-P1 | 4.1 ESV 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1
Alpine1 product
  • dhcp≥ 4.4.0, < 4.4.3_p1-r0
Fedoraproject1 product
Ubuntu1 product
  • isc-dhcp< 4.2.4-7ubuntu12.13+esm2 | < 4.3.3-5ubuntu12.10+esm2 | < 4.3.5-3ubuntu7.4 | < 4.4.1-2.1ubuntu5.20.04.4 | < 4.4.1-2.3ubuntu2.3

5 vendors · 7 products

References

15 links
Show all 15 references