CVE-2026-73282: openbsd openssh Use After Free
CVSS: 4.8v3.1MediumAnalyzed
AliasesALPINE-CVE-2026-73282UBUNTU-CVE-2026-73282DEBIAN-CVE-2026-73282
Published 11-08-2026Last modified 11-08-2026
Vulnerability summary
CVE-2026-73282 is a medium (CVSS 4.8) Use After Free vulnerability in openbsd openssh. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.
CVSS score
4.8/10
010
Medium · v3.1 (CVE.org)EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 10 · Related 5Timeline
- 11-08-2026PublishedVulnerability first disclosed.
- 11-08-2026Last modifiedVulnerability information updated.
Description
In ssh in OpenSSH before 10.5, a use-after-free for realloc data can occur if a certain pair of remote-forwarding operations are concurrent.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 4.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · UbuntuEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- NVDNIST4.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
0.00 pp
From 0.16% on 19-09-2026
19-09-202619-10-2026
EPSS score0.16%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- opensshAll versions (No fix recorded) | < 1:10.5p1-1
- openssh-gssapi< 1:10.5p1-1
Ubuntu2 products
- openssh< 1:6.6p1-2ubuntu2.13+esm4 | < 1:7.2p2-4ubuntu2.10+esm10 | All versions (No fix recorded) | < 1:7.6p1-4ubuntu0.7+esm6 | < 1:8.2p1-4ubuntu0.13+esm3 | < 1:8.9p1-3ubuntu0.17 | < 1:9.6p1-3ubuntu13.19 | < 1:9.6p1-3ubuntu13.19+Fips1 | < 1:10.2p1-2ubuntu3.6
- openssh-ssh1All versions (No fix recorded)
Alpine1 product
- openssh< 10.3_p1-r1
Openbsd1 product
- openssh< 10.5
4 vendors · 6 products
