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CVE-2026-72213: Linux

7.1

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix hugetlb cgroup rsvd charge/uncharge mismatch In alloc_hugetlb_folio(), a single h_cg pointer is used for both the rsvd and non-rsvd hugetlb cgroup charges. When map_chg is set, hugetlb_cgroup_charge_cgroup_rsvd() stores the charged cgroup in h_cg, but the immediately following hugetlb_cgroup_charge_cgroup() overwrites h_cg with the non-rsvd cgroup pointer. As a result, hugetlb_cgroup_commit_charge_rsvd() stores the wrong (non-rsvd) cgroup pointer into the folio's rsvd slot. When the folio is later freed, free_huge_folio() unconditionally calls both hugetlb_cgroup_uncharge_folio() and hugetlb_cgroup_uncharge_folio_rsvd(). The rsvd uncharge reads back the wrong cgroup from the folio and decrements a counter that was never charged for that cgroup, causing a page_counter underflow: page_counter underflow: -512 nr_pages=512 WARNING: mm/page_counter.c:61 at page_counter_cancel Fix this by introducing a separate h_cg_rsvd pointer exclusively for the rsvd charge path, keeping the rsvd and non-rsvd charges fully independent through their charge, commit, and error uncharge paths.

Засегнати продукти

  • Linux Linux: 08cf9faf7558020aed6a0da5810b824b07139dfa преди f8dfdf725bccb0ae41eead2f6da8183727218855; 08cf9faf7558020aed6a0da5810b824b07139dfa преди 043c509f2488033c68c46d2de2af082fcd568612; 08cf9faf7558020aed6a0da5810b824b07139dfa преди 5c32ae4a91fb5f4941328e0c1720a7fa4189c3bd; 08cf9faf7558020aed6a0da5810b824b07139dfa преди 1697d253f51cf5e3825a3423ff49e128a3502ab2; 08cf9faf7558020aed6a0da5810b824b07139dfa преди b785f2bd9496facedc0a031be09cddcd1d3c84d3; 08cf9faf7558020aed6a0da5810b824b07139dfa преди 15807d0ddde37407af72859426b654f3d1972b00
  • Linux Linux: 5.7; преди 5.7; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.101 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-72213: Linux | freedomonline.bg