nasm: Use-after-free in pp_list_one_macro function in asm/preproc.c
Published Dec 21, 2017
5.5
MEDIUMCVSS 3.0
EPSS 1.39%
Description
In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in pp_list_one_macro in asm/preproc.c that will lead to a remote denial of service attack, related to mishandling of operand-type errors.
Affected products
No data.
Configuration 1
- 2.14
Configuration 2
- 14.04
No data.
Red Hat Enterprise Linux 5
nasm
Will not fix
Red Hat Enterprise Linux 6
nasm
Will not fix
Red Hat Enterprise Linux 7
nasm
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | nasm | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | nasm | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | nasm | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
AV:N/AC:M/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 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.39% (0.01394) | 71.38th | v5 (v2026.06.15) |
| Aug 23, 2026 | 2.22% (0.02216) | 81.10th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00083) | 35.77th | v3 (v2023.03.01) |
| Nov 30, 2023 | 0.08% (0.00082) | 34.37th | v3 (v2023.03.01) |
| Oct 30, 2023 | 0.07% (0.00070) | 29.09th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00055) | 20.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.98% (0.00976) | 26.54th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.98% (0.00976) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2017-17820 Vendor Advisory
- https://bugzilla.nasm.us/show_bug.cgi?id=3392433 x_refsource_MISCExploitIssue TrackingThird Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1529335 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-17820
- https://usn.ubuntu.com/3694-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-17820
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2017-17820 | Vendor Advisory | |
| https://bugzilla.nasm.us/show_bug.cgi?id=3392433 | x_refsource_MISCExploitIssue TrackingThird Party AdvisoryVDB Entry | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1529335 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-17820 | ||
| https://usn.ubuntu.com/3694-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2017-17820 |
Change history (0)
No recorded changes yet.