zsh: crash on copying empty hash table
Published Feb 27, 2018
7.5
HIGHCVSS 3.0
EPSS 2.59%
Description
In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.
Affected products
No data.
Configuration 2
- 7.0
- 7.0
- 7.0
Configuration 3
- 14.04
- 16.04
- 17.10
No data.
Red Hat Enterprise Linux 7
zsh-0:5.0.2-31.el7
Fixed · RHSA-2018:3073
Red Hat Enterprise Linux 5
zsh
Not affected
Red Hat Enterprise Linux 6
zsh
Will not fix
Red Hat Enterprise Linux 8
zsh
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | zsh-0:5.0.2-31.el7 | Fixed | RHSA-2018:3073 |
| Red Hat Enterprise Linux 5 | zsh | Not affected | n/a |
| Red Hat Enterprise Linux 6 | zsh | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | zsh | Not affected | 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:N/AC:L/PR:N/UI:N/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:L/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 v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- 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 | 2.59% (0.02591) | 84.75th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.68% (0.02682) | 83.82th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.38% (0.00381) | 73.24th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.38% (0.00381) | 72.25th | v3 (v2023.03.01) |
| Jul 21, 2023 | 0.38% (0.00381) | 69.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.54% (0.00541) | 73.78th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | 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 | v1 |
| Jan 6, 2022 | 1.04% (0.01040) | 27.69th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (8)
- https://access.redhat.com/errata/RHSA-2018:3073 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-7549 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1549858 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-7549
- https://security.gentoo.org/glsa/201805-10 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd x_refsource_MISCPatchThird Party Advisory
- https://usn.ubuntu.com/3593-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-7549
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2018:3073 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2018-7549 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1549858 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-7549 | ||
| https://security.gentoo.org/glsa/201805-10 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd | x_refsource_MISCPatchThird Party Advisory | |
| https://usn.ubuntu.com/3593-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-7549 |
Change history (0)
No recorded changes yet.