CVE-2026-46220: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions that verify fence writeback addresses are dword-aligned. These assertions can be reached from unprivileged userspace via crafted DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a scheduler worker thread. Replace both BUG_ON() calls with WARN_ON() to log the condition without crashing the kernel. A misaligned fence address at this point indicates a driver bug, but crashing the kernel is never the correct response when the assertion is reachable from userspace. The CS IOCTL path is the correct place to filter invalid submissions; the ring emission callback is too late to do anything about it. (cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)

Засегнати продукти

• Linux Linux: 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди ecaa80318e900ca0c3f687742ede33b41cfd2f8e; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди 25e7d56a39657d56d1ea6d78992f7ed15dedb412; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди d4c56932d29773e278be6a65a5384a36c95b89a4; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди 4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди d331fb241a4602253976ddd65144a8ba2b05665d; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди 0b91ea46bb68abf98a082bf239092253bbd6aaa2; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди a4fd82fb0757c180bf622907397c528b89a827b2; 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 преди 78d2e624fa073c14970aa097adcf3ea31c157a66
• Linux Linux: 4.12; преди 4.12; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.140 до 6.6.*; 6.12.90 до 6.12.*; 6.18.32 до 6.18.*; 7.0.9 до 7.0.*; от 7.1 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-2026-46220
• https://nvd.nist.gov/vuln/detail/CVE-2026-46220
• https://git.kernel.org/stable/c/ecaa80318e900ca0c3f687742ede33b41cfd2f8e
• https://git.kernel.org/stable/c/25e7d56a39657d56d1ea6d78992f7ed15dedb412
• https://git.kernel.org/stable/c/d4c56932d29773e278be6a65a5384a36c95b89a4
• https://git.kernel.org/stable/c/4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe
• https://git.kernel.org/stable/c/d331fb241a4602253976ddd65144a8ba2b05665d
• https://git.kernel.org/stable/c/0b91ea46bb68abf98a082bf239092253bbd6aaa2
• https://git.kernel.org/stable/c/a4fd82fb0757c180bf622907397c528b89a827b2
• https://git.kernel.org/stable/c/78d2e624fa073c14970aa097adcf3ea31c157a66