Security readout for executives and security teams
Plain-English summary
CVE-2022-2509 is a GnuTLS memory-handling flaw. When PKCS#7 signatures are verified, a double free can occur and crash affected software. The documented business risk is service disruption, not data theft. Public sources in the bundle do not show active exploitation.
Executive priority
Patch during the next high-priority security maintenance window, faster for internet-facing services using PKCS#7 verification. The impact is availability loss, so urgency depends on service criticality and exposure.
Technical view
The flaw is CWE-415 double free in the GnuTLS gnutls_pkcs7_verify function during PKCS#7 signature verification. CVSS 3.1 is 7.5 with network attack vector, low complexity, no privileges, no user interaction, and availability-only impact. The bundle identifies GnuTLS and indicates 3.7.7 as fixed, but does not fully state affected version ranges.
Likely exposure
Exposure is most likely where applications, appliances, or Linux distributions use GnuTLS to verify PKCS#7 signatures, especially internet-reachable services processing untrusted signed content. Validate through package inventories, SBOMs, and vendor advisories rather than assuming only directly installed GnuTLS packages matter.
Exploitation context
The source bundle supports denial-of-service risk through a crash condition. It does not cite public exploitation, proof-of-concept availability, or inclusion in CISA KEV. Treat exploit status as unknown beyond the provided sources.
Researcher notes
The key uncertainty is version scope: the bundle states GnuTLS and shows 3.7.7 as fixed, but does not provide a complete affected range. Use distro advisories and package changelogs to confirm whether backported fixes apply.
Mitigation direction
- Upgrade GnuTLS using vendor-supported packages or the fixed release identified as 3.7.7.
- Apply relevant Debian, Fedora, Red Hat, or other distribution security updates.
- Check vendor guidance for embedded products or statically linked GnuTLS copies.
- Prioritize internet-facing services that process PKCS#7 signatures.
- Retest affected workflows after patching to confirm normal signature verification.
Validation and detection
- Inventory systems and containers for GnuTLS packages and linked libraries.
- Compare installed versions against vendor advisories for CVE-2022-2509.
- Identify applications using GnuTLS PKCS#7 verification paths.
- Confirm vulnerability scanners no longer report CVE-2022-2509 after updates.
- Review crash logs for unexplained failures in signature verification workflows.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-415: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-2509 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2022-2509CVE reference · x_refsource_MISC
- https://lists.gnupg.org/pipermail/gnutls-help/2022-July/004746.htmlCVE reference · x_refsource_MISC
- DSA-5203CVE reference · vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20220812 [SECURITY] [DLA 3070-1] gnutls28 security updateCVE reference · mailing-list, x_refsource_MLIST
- FEDORA-2022-5470992bfcCVE reference · vendor-advisory, x_refsource_FEDORA
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Double Free
Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.