CVE-2019-13627 — It was discovered that there was a ECDSA timing attack in the libgcrypt20 cryptographic library....

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Canonical Ubuntu Linux, Libgcrypt20 Project Libgcrypt20, Opensuse Leap).
2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
3. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
4. Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-203 · Observable Discrepancy

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.55%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
• Look for anomalous data read/export volumes and access to sensitive records.

Timeline

What happened to this CVE, newest first.

• 2026
• Record published
  Oct 14, 2026
• Affected products added · canonical/ubuntu linux, opensuse/leap, libgcrypt20 project/libgcrypt20
  Oct 14, 2026 · NIST National Vulnerability Database
• CVSS changed · 6.3
  Oct 14, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 14, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 14, 2026 · Alertas do Telegram
• 2019
• CVE published
  Sep 25, 2019 · mitre

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 14, 2026 – Oct 14, 2026
• 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

19 on the record

• lists.opensuse.org/opensuse-security-announce/2020-01/msg00018.html
  Third Party Advisory, vendor-advisory, x_refsource_SUSE, NIST National Vulnerability Database
• minerva.crocs.fi.muni.cz/
  Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• usn.ubuntu.com/4236-3/
  Third Party Advisory, vendor-advisory, x_refsource_UBUNTU, NIST National Vulnerability Database
• lists.opensuse.org/opensuse-security-announce/2019-09/msg00060.html
  Third Party Advisory, vendor-advisory, x_refsource_SUSE, NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2019/09/msg00024.html
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• security-tracker.debian.org/tracker/CVE-2019-13627
  Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• github.com/advisories/GHSA-vwvj-6vw9-cw8w
  GitHub Security Advisories
• minerva.crocs.fi.muni.cz
  GitHub Security Advisories
• github.com/gpg/libgcrypt/releases/tag/libgcrypt-1.8.5
  Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• security.gentoo.org/glsa/202003-32
  Third Party Advisory, vendor-advisory, x_refsource_GENTOO, NIST National Vulnerability Database
• usn.ubuntu.com/4236-1
  GitHub Security Advisories
• www.openwall.com/lists/oss-security/2019/10/02/2
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2020/01/msg00001.html
  Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/html/ssa-398330.html
  NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2019-13627
  GitHub Security Advisories
• usn.ubuntu.com/4236-2
  GitHub Security Advisories
• usn.ubuntu.com/4236-1/
  Third Party Advisory, vendor-advisory, x_refsource_UBUNTU, NIST National Vulnerability Database
• usn.ubuntu.com/4236-3
  GitHub Security Advisories
• usn.ubuntu.com/4236-2/
  Third Party Advisory, vendor-advisory, x_refsource_UBUNTU, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-47334 Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling May 28, 2026
• Medium CVE-2026-47335 NULL pointer dereference in Ubuntu Linux AppArmor notification handling May 28, 2026
• Low CVE-2026-47336 Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules May 28, 2026
• High CVE-2026-47333 Out-of-bounds read in Ubuntu Linux AppArmor notification handling May 28, 2026
• Low CVE-2026-47337 NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation May 28, 2026
• High CVE-2026-47331 Use-after-free in Ubuntu Linux AppArmor notification handling May 28, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No fixed version, patch or mitigation documented.
• No CISA SSVC assessment.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2019-13627 is "It was discovered that there was a ECDSA timing attack in the libgcrypt20 cryptographic library....", rated Medium. It affects Ubuntu Linux (Canonical); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 6.3 describes technical severity. EPSS 0.55% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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