Security readout for executives and security teams
Plain-English summary
CVE-2026-24811 is a critical memory-safety issue in ROOT’s bundled zlib code. If an exposed ROOT-based workflow processes attacker-controlled data, the record indicates serious integrity and availability impact. Public sources show a patch reference, but version-level affected and fixed release details are limited.
Executive priority
Treat as high-priority for environments where ROOT processes outside or partner-supplied data. Prioritize inventory and update planning now, while confirming exact affected versions from ROOT maintainers.
Technical view
The CVE describes improper pointer arithmetic in root-project/root builtins/zlib inffast.c/inffast.C, mapped to CWE-119, CWE-125, CWE-20, and CWE-787. CVSS 4.0 is 9.3 with network attack vector, low complexity, no privileges, and no user interaction. A GitHub pull request is tagged as patch.
Likely exposure
Organizations using ROOT, especially deployments that process externally supplied compressed or ROOT-related data, should assess exposure. The source bundle lists the product as affected but provides unclear version data, showing version “0” rather than a normal affected range.
Exploitation context
No cited source states active exploitation, and the CVE is not listed as KEV. The CVSS vector indicates remotely reachable, unauthenticated attack conditions, but practical exploitability depends on how ROOT is deployed and what inputs it processes.
Researcher notes
Evidence is incomplete on affected version ranges and exploit availability. The strongest source-grounded facts are the critical CVSS 4.0 score, memory-safety CWE mappings, affected ROOT component, KEV false status, and patch pull request reference.
Mitigation direction
- Review the ROOT project patch pull request and related vendor guidance.
- Update ROOT to a vendor-confirmed fixed release when identified.
- Restrict untrusted input processing until affected deployments are updated.
- Reduce network exposure for services or workflows invoking ROOT.
- Monitor ROOT and CVE records for corrected affected-version details.
Validation and detection
- Inventory systems, containers, and analysis pipelines using ROOT.
- Confirm whether ROOT includes the bundled zlib inffast component.
- Compare installed ROOT builds against the patch or fixed release guidance.
- Review logs for crashes in ROOT data-processing workflows.
- Track vendor advisories for final affected and fixed version ranges.
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-119: 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 lookupCWE-125: 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 lookupCWE-20: 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 lookupCWE-787: 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-2026-24811 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
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/S:N/AU:Y/R:U/V:D/RE:M/U:Amber——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/root-project/root/pull/18526CVE reference · patch
- https://root.cern/blog/recent-common-vulnerabilities-when-does-ROOT-need-to-be-updated/CVE reference
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.