CVE-2016-10011: openbsd openssh Key Management Errors
Vulnerability summary
CVE-2016-10011 is a medium (CVSS 6.2) Key Management Errors vulnerability in openbsd openssh. EPSS estimates a 1.10% chance of exploitation in the next 30 days, higher than 65.7% of scored vulnerabilities.
Not severe (CVSS 6.2, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 9Timeline
- 05-01-2017PublishedVulnerability first disclosed.
- 29-05-2026Last modifiedVulnerability information updated.
Description
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
CVSS metrics
8 scores · 5 sources · 3 versions- NVDNIST6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · AlpineEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
1.10%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.10% 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 cause- CWE-320Key Management ErrorsWeaknesses in this category are related to errors in the management of cryptographic keys.
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
Affected systems
Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- openssh< 7.4_p1-r0 | < 6.8_p1-r9 | < 7.2_p2-r3 | < 7.2_p2-r4 | < 7.5_p1-r8
Debian1 product
- openssh< 1:7.4p1-1
Openbsd1 product
- openssh≤ 7.3
Ubuntu1 product
- openssh< 1:6.6p1-2ubuntu2.10 | < 1:7.2p2-4ubuntu2.4
4 vendors · 4 products
References
17 links- www.securitytracker.com/id/1037490VDB Entry
- access.redhat.com/errata/RHSA-2017:2029Vendor Advisory
- www.securityfocus.com/bid/94977VDB Entry