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CVE-2026-53428: leandrocp mdex, отказ на услуга

6.9

CVSS 4.0

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, само при определена конфигурация или състояние на системата, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

Memory Allocation with Excessive Size Value vulnerability in leandrocp mdex allows an unauthenticated attacker to cause a denial of service through unbounded memory allocation. comrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines in native/comrak_nif/src/lumis_adapter.rs eagerly expands a user-controlled inclusive line range from a fenced code block's highlight_lines decorator into a Vec<usize>, pushing one element per integer in the range with no upper bound on the range size. An attacker who can supply Markdown that an application renders with MDEx.to_html/2 (for example a comment, chat message, or wiki page) can embed a code block whose info string is rust highlight_lines="1-100000000", forcing the native adapter to allocate roughly 8 bytes per line in the range. A payload that differs by only a few bytes can therefore allocate hundreds of megabytes, and a sufficiently large range (for example 1-2000000000) exhausts host memory and aborts the BEAM, denying service to every user of the rendering process. The per-line write loop additionally tests membership with a linear scan over the same vector, degrading rendering to a quadratic cost even for ranges that do not immediately exhaust memory. The vulnerable native code originally shipped inside mdex (in native/comrak_nif/src/lumis_adapter.rs) and was later extracted into the separate mdex_native package (native/mdex_native_nif/src/lumis_adapter.rs), where it remains unpatched. This issue affects mdex from 0.11.0 before 0.12.3, and mdex_native from 0.1.0 before 0.2.3.

Засегнати продукти

  • leandrocp mdex: 0.11.0 преди 0.12.3
  • leandrocp mdex: a8407611715d1ead35fbcba79c72cef1b7df387b преди 6ed94d905f97af188323f042698ae841c02293b4
  • leandrocp mdex_native: 0.1.0 преди 0.2.3
  • leandrocp mdex_native: 956528c5e31746253347029e810a969ab916fd27 преди 798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3

Вид слабост

История

  • 29 юни 2026 Публикувано

Други уязвимости в leandrocp mdex

Първоизточници

CVE-2026-53428: leandrocp mdex, отказ на услуга | freedomonline.bg