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CVE-2026-72339: Linux

9.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation.

Засегнати продукти

  • Linux Linux: 8a8633978b842c88fbcfe00d4e5dde96048f630e преди ecc05d4b20220a09c9c69584fc46ca55248a374a; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди 07be8b8adf91b7ada4c3dacce064d572a6066421; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди 1624aa100c0b218181aa74e3696a389b509298cb; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди 0bf78df2d3ecb1f4964ff42a7327d25845955153; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди 814a5edac8c9fc04051808d5faaa93768e989281; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди b066420e57f3402a52c998678b4678252ac9bb63; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди 982d6d6bc059c5dff37a2201c2f08c14bcfcbd20; 8a8633978b842c88fbcfe00d4e5dde96048f630e преди a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f
  • Linux Linux: 4.18; преди 4.18; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72339: Linux | freedomonline.bg