CVE-2024-12243: Inefficient Algorithmic Complexity
Source GCVE Database
Not known to be exploited · CVSS 5.3 Medium · fixed in 9.4.2 : update affected systems when convenient.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 1.2% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 9.4.2, 8.10.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 10 Feb 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
AI-suggested
Red Hat has released official security updates that fix this vulnerability. Users of affected Red Hat Enterprise Linux 8 and 9.4 EUS versions should apply the provided security updates as detailed in Red Hat advisory RHSA-2025:4051. No additional mitigation actions are required beyond applying the official patches.
Description
CVE-2024-12243 is a moderate severity vulnerability in the GnuTLS library's libtasn1 component affecting Red Hat Enterprise Linux 8 and 9.4 Extended Update Support. It involves inefficient DER decoding that can lead to a remote denial of service (DoS). Red Hat has released security updates addressing this issue across multiple architectures including x86_64, s390x, ppc64le, and aarch64.
References
- access.redhat.com/errata/RHSA-2025:4051 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2344615 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_4051.json (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/rhsa-2025_7076.json (opens in a new tab)
- lists.suse.com/pipermail/suse-liberty-linux-updates/2025-June/001539.html (opens in a new tab)
- suse.com/security/cve/CVE-2024-12243/ (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:8020 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_8020.json (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:17361 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:7076 (opens in a new tab)
- access.redhat.com/errata/RHSA-2025:8385 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2024-12243 (opens in a new tab)
- gitlab.com/gnutls/gnutls/-/issues/1553 (opens in a new tab)
- gitlab.com/gnutls/libtasn1/-/issues/52 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/02/msg00027.html (opens in a new tab)
- security.netapp.com/advisory/ntap-20250523-0002/ (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-202008.html (opens in a new tab)