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Vulnerabilities

Vulnerability · openSUSE-SU-2026:22127-1

Security update for putty

Published Oct 19, 2026 · catalog updated Oct 20, 2026 · Security update for putty

Open the advisory

Exploitation likelihood is not on this record for openSUSE-SU-2026:22127-1. A missing EPSS score is not a low risk. Compare Security update for putty with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Security update for putty).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
openSUSE:Leap 16.0 putty

This update for putty fixes the following issues: Changes in putty: - Update to release 0.85 * Fixed a remotely triggerable use-after-free in Pageant. * Fixed a remotely triggerable buffer overflow if the OpenSSH encrypt-then-MAC cipher modes are in use. (Only used if a server supports nothing else.) * Fixed a buffer overflow in private key decryption, if the private key is constructed maliciously. (Only triggerable on purpose if you let somebody else generate a key for you.) * Denial-of-service security fixes for where a server could trigger a tight loop in PuTTY, and even a MITM can make it consume unlimited memory at startup. - Fixed double free in RSA KEX error handling path can be triggered if the key sent by the server is unexpectedly short [boo#1266375, CVE-2026-48850] - Fixed assertion failure in ECDSA signature verification can be triggered during initial key exchange via a crafted host key and signature [boo#1266373, CVE-2026-48852] - Fixed TELNET session data is marked with trust sigils after authenticating to a proxy and allows for password prompt spoofing [boo#1266374, CVE-2026-48851]

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • openSUSE:Leap 16.0 putty0 → 0.85-bp160.1.1

How to fix openSUSE-SU-2026:22127-1

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for openSUSE-SU-2026:22127-1. A missing EPSS score is not a low risk. Compare Security update for putty with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 0.85-bp160.1.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 19, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    This update for putty fixes the following issues: Changes in putty: - Update to release 0.85 * Fixed a remotely triggerable use-after-free in Pageant. * Fixed a remotely triggerable buffer overflow if the OpenSSH encrypt-then-MAC cipher modes are in use. (Only used if a server supports nothing else.) * Fixed a buffer overflow in private key decryption, if the private key is constructed maliciously

  2. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    putty fixed in 0.85-bp160.1.1

  3. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    putty fixed in 0.85-bp160.1.1

  4. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    This update for putty fixes the following issues: Changes in putty: - Update to release 0.85 * Fixed a remotely triggerable use-after-free in Pageant. * Fixed a remotely triggerable buffer overflow if the OpenSSH encrypt-then-MAC cipher modes are in use. (Only used if a server supports nothing else.) * Fixed a buffer overflow in private key decryption, if the private key is constructed maliciously

Sources

References

Freshness

Last verified in this catalog Oct 20, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.