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CVE-2026-59842

A flaw was found in libssh. During server-side GSSAPI key exchange, a client-supplied Curve25519 public key shorter than the expected length is copied without proper length validation, leading to an out-of-bounds heap read. This could allow a remote unauthenticated attacker to disclose small amounts of server memory.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ed77f22bdf5ce1fd529a9392eb855fdb98ba7b0f7cfc15c4e0fb36cbaf5254c9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"libssh","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/3

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"libssh-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0.12.1-4.hum1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/1

Affected products and versions

4 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"libssh","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"unaffected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/3
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"libssh-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0.12.1-4.hum1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"RHSA-2026:42922","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:42922"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/references/0
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-59842"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/references/1
{"name":"RHBZ#2498168","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2498168"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:591039ef8196aa762c28216ab5008c71f8ebc89a3fb5ae63b39f703de6383fe5 · sha256:7d01593e9d55a559… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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