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CVE-2025-8277

A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:98bbba8534d2fe105eaa10d158ca8d8244ae879face6f897fd05d8dfa0eedf72
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 8 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/7

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"libssh2","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:0.10.4-18.el9","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:0.10.4-18.el9","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"libssh2","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/4

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/6

{"collectionURL":"https://www.libssh.org","defaultStatus":"unaffected","packageName":"libssh","versions":[{"lessThan":"0.11.3","status":"affected","version":"0.6.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /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:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/3

Affected products and versions

8 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/7
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"libssh2","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:0.10.4-18.el9","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream","cpe:/o:redhat:enterprise_linux:9::baseos"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:0.10.4-18.el9","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"libssh2","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"libssh","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/6
{"collectionURL":"https://www.libssh.org","defaultStatus":"unaffected","packageName":"libssh","versions":[{"lessThan":"0.11.3","status":"affected","version":"0.6.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /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:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-401","description":"Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"RHSA-2026:18683","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:18683"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/references/0
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2025-8277"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/references/1
{"name":"RHBZ#2383888","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2383888"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/references/2
{"url":"https://www.libssh.org/security/advisories/CVE-2025-8277.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2c8114a0aacf8715ad1af4da98a3b5154bd504498ba08584b9d067a7e0b7eee4 · sha256:79ee2649f1df8cf0… · /containers/cna/references/3

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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