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"text":"HIGH"
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{
"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix use-after-free in do_zone_finish()\n\nShinichiro reported the following use-after-free triggered by the device\nreplace operation in fstests btrfs/070.\n\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\n ==================================================================\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\n\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G W 6.8.0-rc5-kts #1\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n Call Trace:\n \n dump_stack_lvl+0x5b/0x90\n print_report+0xcf/0x670\n ? __virt_addr_valid+0x200/0x3e0\n kasan_report+0xd8/0x110\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n do_zone_finish+0x91a/0xb90 [btrfs]\n btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\n ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\n ? btrfs_put_root+0x2d/0x220 [btrfs]\n ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\n cleaner_kthread+0x21e/0x380 [btrfs]\n ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\n kthread+0x2e3/0x3c0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x70\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \n\n Allocated by task 3493983:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n btrfs_alloc_device+0xb3/0x4e0 [btrfs]\n device_list_add.constprop.0+0x993/0x1630 [btrfs]\n btrfs_scan_one_device+0x219/0x3d0 [btrfs]\n btrfs_control_ioctl+0x26e/0x310 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n Freed by task 3494056:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3f/0x60\n poison_slab_object+0x102/0x170\n __kasan_slab_free+0x32/0x70\n kfree+0x11b/0x320\n btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\n btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\n btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\n btrfs_ioctl+0xb27/0x57d0 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n The buggy address belongs to the object at ffff8881543c8000\n which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 96 bytes inside of\n freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\n\n The buggy address belongs to the physical page:\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n page_type: 0xffffffff()\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ^\n ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nThis UAF happens because we're accessing stale zone information of a\nalready removed btrfs_device in do_zone_finish().\n\nThe sequence of events is as follows:\n\nbtrfs_dev_replace_start\n btrfs_scrub_dev\n btrfs_dev_replace_finishing\n btrfs_dev_replace_update_device_in_mapping_tree <-- devices replaced\n btrfs_rm_dev_replace_free_srcdev\n btrfs_free_device <-- device freed\n\ncleaner_kthread\n btrfs_delete_unused_bgs\n btrfs_zone_finish\n do_zone_finish <-- refers the freed device\n\nThe reason for this is that we're using a\n---truncated---",
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{
"text":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: fix use-after-free in do_zone_finish()\n\nShinichiro reported the following use-after-free triggered by the device\nreplace operation in fstests btrfs/070.\n\n BTRFS info (device nullb1): scrub: finished on devid 1 with status: 0\n ==================================================================\n BUG: KASAN: slab-use-after-free in do_zone_finish+0x91a/0xb90 [btrfs]\n Read of size 8 at addr ffff8881543c8060 by task btrfs-cleaner/3494007\n\n CPU: 0 PID: 3494007 Comm: btrfs-cleaner Tainted: G W 6.8.0-rc5-kts #1\n Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 3.3 02/21/2020\n Call Trace:\n \n dump_stack_lvl+0x5b/0x90\n print_report+0xcf/0x670\n ? __virt_addr_valid+0x200/0x3e0\n kasan_report+0xd8/0x110\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n ? do_zone_finish+0x91a/0xb90 [btrfs]\n do_zone_finish+0x91a/0xb90 [btrfs]\n btrfs_delete_unused_bgs+0x5e1/0x1750 [btrfs]\n ? __pfx_btrfs_delete_unused_bgs+0x10/0x10 [btrfs]\n ? btrfs_put_root+0x2d/0x220 [btrfs]\n ? btrfs_clean_one_deleted_snapshot+0x299/0x430 [btrfs]\n cleaner_kthread+0x21e/0x380 [btrfs]\n ? __pfx_cleaner_kthread+0x10/0x10 [btrfs]\n kthread+0x2e3/0x3c0\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x70\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \n\n Allocated by task 3493983:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n btrfs_alloc_device+0xb3/0x4e0 [btrfs]\n device_list_add.constprop.0+0x993/0x1630 [btrfs]\n btrfs_scan_one_device+0x219/0x3d0 [btrfs]\n btrfs_control_ioctl+0x26e/0x310 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n Freed by task 3494056:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3f/0x60\n poison_slab_object+0x102/0x170\n __kasan_slab_free+0x32/0x70\n kfree+0x11b/0x320\n btrfs_rm_dev_replace_free_srcdev+0xca/0x280 [btrfs]\n btrfs_dev_replace_finishing+0xd7e/0x14f0 [btrfs]\n btrfs_dev_replace_by_ioctl+0x1286/0x25a0 [btrfs]\n btrfs_ioctl+0xb27/0x57d0 [btrfs]\n __x64_sys_ioctl+0x134/0x1b0\n do_syscall_64+0x99/0x190\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n\n The buggy address belongs to the object at ffff8881543c8000\n which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 96 bytes inside of\n freed 1024-byte region [ffff8881543c8000, ffff8881543c8400)\n\n The buggy address belongs to the physical page:\n page:00000000fe2c1285 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1543c8\n head:00000000fe2c1285 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0\n flags: 0x17ffffc0000840(slab|head|node=0|zone=2|lastcpupid=0x1fffff)\n page_type: 0xffffffff()\n raw: 0017ffffc0000840 ffff888100042dc0 ffffea0019e8f200 dead000000000002\n raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff8881543c7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff8881543c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffff8881543c8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ^\n ffff8881543c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n ffff8881543c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n\nThis UAF happens because we're accessing stale zone information of a\nalready removed btrfs_device in do_zone_finish().\n\nThe sequence of events is as follows:\n\nbtrfs_dev_replace_start\n btrfs_scrub_dev\n btrfs_dev_replace_finishing\n btrfs_dev_replace_update_device_in_mapping_tree <-- devices replaced\n btrfs_rm_dev_replace_free_srcdev\n btrfs_free_device <-- device freed\n\ncleaner_kthread\n btrfs_delete_unused_bgs\n btrfs_zone_finish\n do_zone_finish <-- refers the freed device\n\nThe reason for this is that we're using a\n---truncated---",
"category":"description",
"title":"Vulnerability Description"
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"category":"vendor_fix",
"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2446"
}
],
"scores":[
{
"cvss_v3":{
"baseSeverity":"MEDIUM",
"baseScore":5.5,
"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version":"3.1"
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"threats":[
{
"details":"Medium",
"category":"impact"
}
],
"title":"CVE-2024-26944"
}
]
}