CVE-2026-98242: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: dma-buf: Fix silent overflow for phys vec to sgt In case MMIO size is bigger than 4G and peer2peer DMA goes through host bridge, we trigger a code path that assigns the total linked IOVA (which is greater than 4G) to mapped_len. Previously, `mapped_len` was declared as 32-bit `unsigned int`. When accumulating `size_t` lengths, this leads to a silent wrap-around. This truncation causes truncated lengths to be passed to functions like `fill_sg_entry()`. Fix this by changing `mapped_len` to `size_t` (64-bit). While at it, fix similar potential overflow issues in `calc_sg_nents` by using `check_add_overflow()` for `nents` and using `unsigned int` for the loop iterator in `fill_sg_entry` to match.

Засегнати продукти

• Linux Linux: 3aa31a8bb11e47c0ff2b306988d1756b810c1c3c преди 6b98fd7106d4e486f432664893dcd4d6fa3a9693; 3aa31a8bb11e47c0ff2b306988d1756b810c1c3c преди b344ca94e8cc85796f16ea25e2e5a8e0303fe813
• Linux Linux: 6.19; преди 6.19; 7.2.8 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-98242
• https://nvd.nist.gov/vuln/detail/CVE-2026-98242
• https://git.kernel.org/stable/c/6b98fd7106d4e486f432664893dcd4d6fa3a9693
• https://git.kernel.org/stable/c/b344ca94e8cc85796f16ea25e2e5a8e0303fe813