CVE-2019-9897: debian debian_linux
Vulnerability summary
CVE-2019-9897 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 2.94% chance of exploitation in the next 30 days, higher than 87.1% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 2Timeline
- 21-03-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.94%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.94% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- putty< 0.70-6
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- putty< 0.71-r0
Fedoraproject1 product
- fedoraEOL28 | 29
Netapp1 product
Opensuse1 product
- leapEOL15.0
Putty1 product
- putty< 0.71
Ubuntu1 product
- putty< 0.67-3+deb9u1build0.16.04.1 | All versions (No fix recorded)
7 vendors · 8 products
References
13 links- lists.opensuse.org/opensuse-security-announce/2019-04/msg00004.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00020.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2019/04/msg00023.htmlMailing ListX Refsource MLISTThird Party Advisory