> CVE-2026-44983 [HIGH]

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PUBLISHED
2026-05-26 22:16
MODIFIED
2026-05-26 22:16
CVSS_SCORE V3
7.3
EPSS (Prob. Exploit)
0.15%
Top 95.7%
DATA SOURCES:
NVD đź”— 2026-05-26 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-11-05 OSV đź”— 2026-10-26

> DESCRIPTION

smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
EXPLOITABILITY
2.5
IMPACT
4.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-122 CWE-190

> CWE DETAILED DESCRIPTIONS

CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap. | CWE-190: Integer Overflow or Wraparound - The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

> GITHUB SECURITY ADVISORY

GHSA-97wc-2hqc-cjgr HIGH

smallbitvec: Integer overflow in safe API leads to heap buffer overflow

AFFECTED PACKAGES:
RUST / smallbitvec
>= 1.0.1, <= 2.6.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow

AFFECTED PACKAGES:
Unknown / Unknown
17 versions affected
ALIASES:
GHSA-97wc-2hqc-cjgr

> HISTORIQUE DES MODIFICATIONS

Première apparition
26/05/2026 22:16
Source: NVD
đź“Š ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-122: Heap-based Buffer Overflow - A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the bu...
Nouvelle valeur:
CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap. | CWE-190: Integer Overflow or Wraparound - The product performs a calculation that ca...
đź“Š ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-122: Heap-based Buffer Overflow - A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the bu...
Total des modifications: 2 Dernière mise à jour: 6 days ago

> REFERENCES

https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr
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