CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, без вход и след 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: fs/ntfs3: validate lcns_follow in log_replay conversion log_replay() converts DIR_PAGE_ENTRY_32 records into DIR_PAGE_ENTRY records when replaying version 0 restart tables. During this conversion, the memmove() length is derived directly from the on-disk lcns_follow field: memmove(&dp->vcn, &dp0->vcn_low, 2 * sizeof(u64) + le32_to_cpu(dp->lcns_follow) * sizeof(u64)); check_rstbl() validates restart table structure, but does not constrain per-entry lcns_follow values relative to the entry size. A malformed filesystem image can provide an oversized lcns_follow value, causing the conversion memmove() to access memory beyond the bounds of the allocated restart table buffer. The same field is later used to bound iteration over page_lcns[], so validating lcns_follow during conversion also prevents downstream out-of-bounds access from the same malformed metadata. Compute the maximum valid lcns_follow from the already-validated restart table entry size and reject entries that exceed this bound. Reuse the existing t16/t32 scratch variables already declared in log_replay() to avoid introducing new declarations. [[email protected]: fixed the conflicts]
Засегнати продукти
- Linux Linux: b46acd6a6a627d876898e1c84d3f84902264b445 преди ca343a99806b4fc8e27c48f08be3445c5fcd1445; b46acd6a6a627d876898e1c84d3f84902264b445 преди ddfc8683e1a627dbf1b83bacf8961443dd654258; b46acd6a6a627d876898e1c84d3f84902264b445 преди 57c071e2c4f30b9c6f5aacb6679aab1269fbae99; b46acd6a6a627d876898e1c84d3f84902264b445 преди 159f694d682e4215b3822ae31ed3a4631628fe55; b46acd6a6a627d876898e1c84d3f84902264b445 преди 7adb38279812c9c06b0e3fa7382f4d7887f3fa2d; b46acd6a6a627d876898e1c84d3f84902264b445 преди 32b9f8733feb241627fa5f564b1a99b5cae974c5; b46acd6a6a627d876898e1c84d3f84902264b445 преди 6a4c53a2e26a865565bd6a460961e8d6fcb32329
- Linux Linux: 5.15; преди 5.15; 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
Вид слабост
История
- 27 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-64533
- https://nvd.nist.gov/vuln/detail/CVE-2026-64533
- https://git.kernel.org/stable/c/ca343a99806b4fc8e27c48f08be3445c5fcd1445
- https://git.kernel.org/stable/c/ddfc8683e1a627dbf1b83bacf8961443dd654258
- https://git.kernel.org/stable/c/57c071e2c4f30b9c6f5aacb6679aab1269fbae99
- https://git.kernel.org/stable/c/159f694d682e4215b3822ae31ed3a4631628fe55
- https://git.kernel.org/stable/c/7adb38279812c9c06b0e3fa7382f4d7887f3fa2d
- https://git.kernel.org/stable/c/32b9f8733feb241627fa5f564b1a99b5cae974c5
- https://git.kernel.org/stable/c/6a4c53a2e26a865565bd6a460961e8d6fcb32329