nasm: heap-based buffer over-read in do_directive in asm/preproc.c
Published Nov 12, 2018
7.8
HIGHCVSS 3.0
EPSS 1.24%
Description
Netwide Assembler (NASM) 2.14rc16 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c for the special cases of the % and $ and ! characters.
Affected products
No data.
Configuration 1
- 12.14
Configuration 2
- 5.0
- 6.0
- 7.0
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
Fix deferred
Red Hat Enterprise Linux 8
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 | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | nasm | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of nasm as shipped with Red Hat Enterprise Linux 5, 6, and 7. Red Hat Enterprise Linux 5 is now in Extended Life Phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/. Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Low, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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:H/I:H/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:P/I:P/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.24% (0.01243) | 68.13th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.24% (0.01243) | 67.89th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.19% (0.00186) | 56.20th | v3 (v2023.03.01) |
| Nov 6, 2023 | 0.19% (0.00186) | 55.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00156) | 50.10th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (8)
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.html vendor-advisoryx_refsource_SUSE
- https://access.redhat.com/security/cve/CVE-2018-19215 Vendor Advisory
- https://bugzilla.nasm.us/show_bug.cgi?id=3392525 x_refsource_MISCExploitIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1652041 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-19215
- https://repo.or.cz/nasm.git/commit/4b5b737d4991578b1918303dc0fd9c9ab5c7ce4f x_refsource_MISCThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-19215
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.html | vendor-advisoryx_refsource_SUSE | |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.html | vendor-advisoryx_refsource_SUSE | |
| https://access.redhat.com/security/cve/CVE-2018-19215 | Vendor Advisory | |
| https://bugzilla.nasm.us/show_bug.cgi?id=3392525 | x_refsource_MISCExploitIssue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1652041 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-19215 | ||
| https://repo.or.cz/nasm.git/commit/4b5b737d4991578b1918303dc0fd9c9ab5c7ce4f | x_refsource_MISCThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-19215 |
Change history (0)
No recorded changes yet.