CVE catalog

CVE-2026-106582

In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Published: Oct 6, 2026, 8:35:32 PM UTC
Updated: Oct 6, 2026, 9:17:19 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.18% · Oct 22, 2026

In sshd and ssh in OpenSSH before 10.6, an LZ77 dictionary coder can be used even though this is contraindicated by the arXiv 2609.07709 "Crossing the Streams" findings.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	openssh	sid	`1:10.6p1-1`	fixed
Debian	openssh	forky	`1:10.6p1-1`	fixed
Debian	openssh	trixie	`1:10.0p1-7+deb13u4`	vulnerable
Debian	openssh	trixie-security	`1:10.0p1-7+deb13u2`	vulnerable
Debian	openssh	bookworm	`1:9.2p1-2+deb12u10`	vulnerable
Debian	openssh	bookworm-security	`1:9.2p1-2+deb12u9`	vulnerable
Cpe	openssh	Not reported	`10.6`	fixed
Ubuntu	openssh	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh-client	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh-server	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh-sftp-server	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh-tests	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	ssh	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	ssh-askpass-gnome	noble	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.7+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.12+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.13+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.14+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.15+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.16+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.16+Fips2`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.18+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.19+Fips1`	vulnerable
Ubuntu	openssh	pro	`1:9.6p1-3ubuntu13.20+Fips1`	vulnerable
Ubuntu	openssh-ssh1	18.04	`1:7.5p1-8`	vulnerable
Ubuntu	openssh-ssh1	18.04	`1:7.5p1-9`	vulnerable
Ubuntu	openssh-ssh1	18.04	`1:7.5p1-9build1`	vulnerable
Ubuntu	openssh-ssh1	18.04	`1:7.5p1-10`	vulnerable
Ubuntu	openssh-ssh1	20.04	`1:7.5p1-11build1`	vulnerable
Ubuntu	openssh	22.04	`1:8.4p1-6ubuntu2`	vulnerable
Ubuntu	openssh	22.04	`1:8.7p1-2`	vulnerable
Ubuntu	openssh	22.04	`1:8.7p1-2build1`	vulnerable
Ubuntu	openssh	22.04	`1:8.7p1-4`	vulnerable
Ubuntu	openssh	22.04	`1:8.8p1-1`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.1`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.3`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.4`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.5`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.6`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.7`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.10`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.11`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.13`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.14`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.15`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.16`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.17`	vulnerable
Ubuntu	openssh	22.04	`1:8.9p1-3ubuntu0.18`	fixed
Ubuntu	openssh-ssh1	22.04	`1:7.5p1-12`	vulnerable
Ubuntu	openssh-ssh1	22.04	`1:7.5p1-12build1`	vulnerable
Ubuntu	openssh-ssh1	22.04	`1:7.5p1-13`	vulnerable
Ubuntu	openssh	24.04	`1:9.3p1-1ubuntu3`	vulnerable
Ubuntu	openssh	24.04	`1:9.4p1-1ubuntu1`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu1`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu2`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu11`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu12`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.3`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.4`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.5`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.7`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.8`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.9`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.11`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.12`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.13`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.14`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.15`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.16`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.18`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.19`	vulnerable
Ubuntu	openssh	24.04	`1:9.6p1-3ubuntu13.20`	fixed
Ubuntu	openssh-ssh1	24.04	`1:7.5p1-14`	vulnerable
Ubuntu	openssh-ssh1	24.04	`1:7.5p1-15`	vulnerable
Ubuntu	openssh-ssh1	24.04	`1:7.5p1-15build1`	vulnerable
Ubuntu	openssh-ssh1	24.04	`1:7.5p1-16`	vulnerable
Ubuntu	openssh	26.10	`1:10.2p1-2ubuntu3`	vulnerable
Ubuntu	openssh	26.10	`1:10.3p1-4ubuntu1`	vulnerable
Ubuntu	openssh	26.10	`1:10.3p1-4ubuntu2`	vulnerable
Ubuntu	openssh	26.10	`1:10.5p1-1ubuntu2`	vulnerable
Ubuntu	openssh	26.10	`1:10.5p1-1ubuntu3.1`	fixed
Ubuntu	openssh-gssapi	26.10	`1:10.5p1-1ubuntu1`	vulnerable
Ubuntu	openssh-gssapi	26.10	`1:10.5p1-1ubuntu2`	vulnerable
Ubuntu	openssh-gssapi	26.10	`1:10.5p1-1ubuntu3`	vulnerable
Ubuntu	openssh-gssapi	26.10	`1:10.5p1-1ubuntu3.1`	fixed
Ubuntu	openssh-ssh1	26.10	`1:7.5p1-18`	vulnerable
Ubuntu	openssh-ssh1	26.10	`1:7.5p1-18ubuntu1`	vulnerable
Ubuntu	openssh-ssh1	26.10	`1:7.5p1-18ubuntu2`	vulnerable
Ubuntu	openssh	26.04	`1:10.0p1-5ubuntu5`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu1`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.2`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.4`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.5`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.6`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.7`	vulnerable
Ubuntu	openssh	26.04	`1:10.2p1-2ubuntu3.8`	fixed
Ubuntu	openssh-ssh1	26.04	`1:7.5p1-17`	vulnerable
Ubuntu	openssh-ssh1	26.04	`1:7.5p1-18`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openssh	source	sid	`1:10.6p1-1`	not yet assigned	Not reported	Not reported
Debian	openssh	source	forky	`1:10.6p1-1`	not yet assigned	Not reported	Not reported
Debian	openssh	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	openssh	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	openssh	cpe	Not reported	`10.6`	Not reported	NVD-CVE-2026-106582	Not reported
Ubuntu	openssh	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	openssh-client	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	openssh-server	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	openssh-sftp-server	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	openssh-tests	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	ssh	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	ssh-askpass-gnome	deb	noble	`1:9.6p1-3ubuntu13.20`	Not reported	Not reported	Not reported
Ubuntu	openssh	deb	22.04	`1:8.9p1-3ubuntu0.18`	Not reported	UBUNTU-CVE-2026-106582	Not reported
Ubuntu	openssh	deb	24.04	`1:9.6p1-3ubuntu13.20`	Not reported	UBUNTU-CVE-2026-106582	Not reported
Ubuntu	openssh	deb	26.10	`1:10.5p1-1ubuntu3.1`	Not reported	UBUNTU-CVE-2026-106582	Not reported
Ubuntu	openssh-gssapi	deb	26.10	`1:10.5p1-1ubuntu3.1`	Not reported	UBUNTU-CVE-2026-106582	Not reported
Ubuntu	openssh	deb	26.04	`1:10.2p1-2ubuntu3.8`	Not reported	UBUNTU-CVE-2026-106582	Not reported

Notes

[trixie] openssh: Minor issue [bookworm] openssh: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[openssh-client]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
[openssh-client-gssapi]Affected
Source package: [openssh]
Details (2)
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
[openssh-server]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
[openssh-server-gssapi]Affected
Source package: [openssh]
Details (2)
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
[openssh-sftp-server]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
[openssh-tests]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
[ssh]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · all · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · all · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · all · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · all · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · all · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · all · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · all · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
[ssh-askpass-gnome]Affected
Source package: [openssh]
Details (8)
- 1:9.2p1-2+deb12u10 · amd64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u10 · arm64 · bookworm
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:10.0p1-7~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · amd64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u9 · arm64 · bookworm-security
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · amd64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm
- 1:9.2p1-2+deb12u7 · arm64 · bookworm-updates
  Affected
  nvd · openssh · debian · bookworm

Observed: Oct 23, 2026, 7:40:21 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]