Описание
Important: kernel security update
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
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kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released (CVE-2025-40323)
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kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)
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kernel: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg (CVE-2026-46230)
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kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB (CVE-2026-46204)
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kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg (CVE-2026-46199)
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kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)
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kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034)
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kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)
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kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)
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kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update (CVE-2026-68156)
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kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)
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kernel: drm/amdgpu: Fix context pstate override handling (CVE-2026-68273)
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kernel: perf: Reject exited events as group leaders (CVE-2026-74753)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Затронутые продукты
Rocky Linux 8
Ссылки на источники
Исправления
- Red Hat - 2419883
- Red Hat - 2482104
- Red Hat - 2482533
- Red Hat - 2482543
- Red Hat - 2482649
- Red Hat - 2502318
- Red Hat - 2502394
- Red Hat - 2508319
- Red Hat - 2513165
- Red Hat - 2513232
- Red Hat - 2513295
- Red Hat - 2513434
- Red Hat - 2524434
Связанные уязвимости
ELSA-2026-71700: kernel security, bug fix, and enhancement update (IMPORTANT)
In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fb_display[i]->mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fb_mode_is_equal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by task syz.xxx ... Call Trace: <TASK> dump_stack_lvl+0xab/0xe0 print_address_description.constprop.0+0x2c/0x390 print_report+0xb9/0x280 kasan_report+0xb8/0xf0 fb_mode_is_equal+0x285/0x2f0 fbcon_mode_deleted+0x129/0x180 fb_set_var+0xe7f/0x11d0 do_fb_ioctl+0x6a0/0x750 fb_ioctl+0xe0/0x140 __x64_sys_ioctl+0x193/0x210 do_syscall_64+0x5f/0x9c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Based on experimentation and analysis, during framebuffer unregistration, only the memory of fb_info->modelist is freed, without setting the corresponding fb_display[i]->mode to NULL for the freed modes. This leads to UAF issues during subsequent accesses. Here's an example of reproduction steps: 1. With /dev/fb0 ...
In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fb_display[i]->mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fb_mode_is_equal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by task syz.xxx ... Call Trace: <TASK> dump_stack_lvl+0xab/0xe0 print_address_description.constprop.0+0x2c/0x390 print_report+0xb9/0x280 kasan_report+0xb8/0xf0 fb_mode_is_equal+0x285/0x2f0 fbcon_mode_deleted+0x129/0x180 fb_set_var+0xe7f/0x11d0 do_fb_ioctl+0x6a0/0x750 fb_ioctl+0xe0/0x140 __x64_sys_ioctl+0x193/0x210 do_syscall_64+0x5f/0x9c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e Based on experimentation and analysis, during framebuffer unregistration, only the memory of fb_info->modelist is freed, without setting the corresponding fb_display[i]->mode to NULL for the freed modes. This leads to UAF issues during subsequent accesses. Here's an example of reproduction steps: 1. With /dev/fb0 ...