VulnSocial

CVE-2026-33845Disclosure(gnu / enterprise_linux)

LOWCVSS 9.1 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch gnu enterprise_linux systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.

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1.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Other references
Weakness type (CWE)
CWE-191

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • enterprise_linux
  • gnutls
  • openshift_container_platform

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-04-30); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
gnuredhat
Products
enterprise_linuxgnutlsopenshift_container_platform

7 versions affected across 3 products

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-04-30: 1Mentions · 2026-05-12: 1Mentions · 2026-05-27: 1Patch / Workaround · 2026-05-12: 1Technical Details · 2026-04-30: 1Technical Details · 2026-05-12: 1Technical Details · 2026-05-27: 104-3005-1205-27
Signal classification3 categories
Disclosure
133.3%
Patch
133.3%
General
133.3%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-04-301
Disclosure1
2026-05-121
Patch1
2026-05-271
General1
Full discourse3 posts
  • إبراهيم بوحيمد | Ibrahim Buhaimed@buhaimedi
    General

    صدرت اليوم ٨ ثغرات بتصنيف حرج او عالي الخطورة في مكتبة GnuTLS الي شرحتها في التغريده المقتبسه ـ📍 (CVE-2026-42010) تقييم (NVD): 🔴 9.8 (حرجة) تقييم (Red Hat): 🟠 7.1 (عالية) ـ📍 (CVE-2026-33845) تقييم (NVD): 🔴 9.1 (حرجة) تقييم (Red Hat): 🟠 7.5 (عالية) ـ📍 (CVE-2026-42013) تقييم (Red Hat): 🟠 8.2 (عالية) تصنيف (GnuTLS) الرسمي: 🟡 (متوسطة) ـ📍 (CVE-2026-5260) تقييم (Red Hat): 🟠 8.2 (عالية) ـ📍 (CVE-2026-33846) تقييم (Red Hat): 🟠 7.5 (عالية) ـ📍 (CVE-2026-42009) تقييم (Red Hat): 🟠 7.5 (عالية) ـ📍 (CVE-2026-3833) تقييم (NVD): 🟠 7.4 (عالية) تقييم (Red Hat): 🟡 6.5 (متوسطة) ـ📍 (CVE-2026-42011) تقييم (Red Hat / Ubuntu CVSS): 🟠 7.4 (عالية) أولوية (Ubuntu) الفعلية: 🟡 (متوسطة)

    Post summary

    The tweet lists seven high‑/critical‑severity CVEs in GnuTLS with their NVD and Red Hat CVSS scores and the official GnuTLS classification for one, but provides no exploit code, patch, or evidence of active exploitation.

    03023124.3K
    50.0K followersView on X
  • iototsecnews@iototsecnews
    Patch

    GnuTLS 3.8.13 リリース：認証バイパスとメモリ破損を含む複数の脆弱性を修正 https://iototsecnews.jp/2026/05/05/gnutls-3-8-13-released-with-fix-for-12-vulnerabilities-affecting-network-communications/ 今回のアップデートでは、メモリ管理の不備や認証処理のロジックミスを原因とする脆弱性が修正されています。具体的には、メモリの境界チェックが不足していたために発生する、CVE-2026-33846 や CVE-2026-33845 などのヒープ関連の脆弱性が修正されています。また、ユーザー名処理の不備からログインを許してしまう CVE-2026-42010 などの、プログラムが想定外の入力に対して正しく振る舞えない問題も対処されています。特に、DTLS の実装や証明書検証 (CVE-2026-42013) といった通信の根幹に関わる部分で、境界値の確認やポインタの扱い、名前の照合ルールが不十分であったことが、深刻なリスクを生むきっかけとなっています。ご利用のチームは、ご注意ください。 #CVE202633845 #CVE202633846 #CVE20263833 #CVE202642009 #CVE202642010 #CVE202642013 #CVE202642014 #CVE20265419 #GnuTLS #Vulnerability

    Post summary

    The GnuTLS 3.8.13 release addresses several memory‑corruption and authentication bypass vulnerabilities (CVE‑2026‑33845/46, 42010, 42013) with improved boundary checks and input validation. No exploit or PoC details are included.

    01000113
    491 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-33845 A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulti… https://www.cve.org/CVERecord?id=CVE-2026-33845

    Post summary

    The post provides technical details of a GnuTLS DTLS integer underflow flaw (CVE-2026-33845) but does not mention a PoC, exploit, active use, or patch.

    00000109
    57.3K followersView on X
CPE platform detail7 entries

7 of 7 entries

PartVendorProductVersionTarget SWTarget HW
Appgnugnutls---
OSredhatenterprise_linux10.0--
OSredhatenterprise_linux6.0--
OSredhatenterprise_linux7.0--
OSredhatenterprise_linux8.0--
OSredhatenterprise_linux9.0--
Appredhatopenshift_container_platform4.0--

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