[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"cve-CVE-2024-50225":3},{"id":4,"cve_id":5,"euvd_id":6,"summary":7,"published":8,"cvss_data":9,"is_remote":20,"cwes":21,"cpes":23,"technologies":30,"references":32,"score":35,"epss_score":36,"epss_percentile":37,"is_kev":20,"cisa_kev_date_added":38,"cisa_kev_due_date":38,"cisa_ssvc":39,"attack_mappings":49,"exploits":56},36520,"CVE-2024-50225","EUVD-2024-44727","In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix error propagation of split bios\n\nThe purpose of btrfs_bbio_propagate_error() shall be propagating an error\nof split bio to its original btrfs_bio, and tell the error to the upper\nlayer. However, it's not working well on some cases.\n\n* Case 1. Immediate (or quick) end_bio with an error\n\nWhen btrfs sends btrfs_bio to mirrored devices, btrfs calls\nbtrfs_bio_end_io() when all the mirroring bios are completed. If that\nbtrfs_bio was split, it is from btrfs_clone_bioset and its end_io function\nis btrfs_orig_write_end_io. For this case, btrfs_bbio_propagate_error()\naccesses the orig_bbio's bio context to increase the error count.\n\nThat works well in most cases. However, if the end_io is called enough\nfast, orig_bbio's (remaining part after split) bio context may not be\nproperly set at that time. Since the bio context is set when the orig_bbio\n(the last btrfs_bio) is sent to devices, that might be too late for earlier\nsplit btrfs_bio's completion.  That will result in NULL pointer\ndereference.\n\nThat bug is easily reproducible by running btrfs\u002F146 on zoned devices [1]\nand it shows the following trace.\n\n[1] You need raid-stripe-tree feature as it create \"-d raid0 -m raid1\" FS.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000020\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: Oops: 0000 [#1] PREEMPT SMP PTI\n  CPU: 1 UID: 0 PID: 13 Comm: kworker\u002Fu32:1 Not tainted 6.11.0-rc7-BTRFS-ZNS+ #474\n  Hardware name: Bochs Bochs, BIOS Bochs 01\u002F01\u002F2011\n  Workqueue: writeback wb_workfn (flush-btrfs-5)\n  RIP: 0010:btrfs_bio_end_io+0xae\u002F0xc0 [btrfs]\n  BTRFS error (device dm-0): bdev \u002Fdev\u002Fmapper\u002Ferror-test errs: wr 2, rd 0, flush 0, corrupt 0, gen 0\n  RSP: 0018:ffffc9000006f248 EFLAGS: 00010246\n  RAX: 0000000000000000 RBX: ffff888005a7f080 RCX: ffffc9000006f1dc\n  RDX: 0000000000000000 RSI: 000000000000000a RDI: ffff888005a7f080\n  RBP: ffff888011dfc540 R08: 0000000000000000 R09: 0000000000000001\n  R10: ffffffff82e508e0 R11: 0000000000000005 R12: ffff88800ddfbe58\n  R13: ffff888005a7f080 R14: ffff888005a7f158 R15: ffff888005a7f158\n  FS:  0000000000000000(0000) GS:ffff88803ea80000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000000000000020 CR3: 0000000002e22006 CR4: 0000000000370ef0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003CTASK>\n   ? __die_body.cold+0x19\u002F0x26\n   ? page_fault_oops+0x13e\u002F0x2b0\n   ? _printk+0x58\u002F0x73\n   ? do_user_addr_fault+0x5f\u002F0x750\n   ? exc_page_fault+0x76\u002F0x240\n   ? asm_exc_page_fault+0x22\u002F0x30\n   ? btrfs_bio_end_io+0xae\u002F0xc0 [btrfs]\n   ? btrfs_log_dev_io_error+0x7f\u002F0x90 [btrfs]\n   btrfs_orig_write_end_io+0x51\u002F0x90 [btrfs]\n   dm_submit_bio+0x5c2\u002F0xa50 [dm_mod]\n   ? find_held_lock+0x2b\u002F0x80\n   ? blk_try_enter_queue+0x90\u002F0x1e0\n   __submit_bio+0xe0\u002F0x130\n   ? ktime_get+0x10a\u002F0x160\n   ? lockdep_hardirqs_on+0x74\u002F0x100\n   submit_bio_noacct_nocheck+0x199\u002F0x410\n   btrfs_submit_bio+0x7d\u002F0x150 [btrfs]\n   btrfs_submit_chunk+0x1a1\u002F0x6d0 [btrfs]\n   ? lockdep_hardirqs_on+0x74\u002F0x100\n   ? __folio_start_writeback+0x10\u002F0x2c0\n   btrfs_submit_bbio+0x1c\u002F0x40 [btrfs]\n   submit_one_bio+0x44\u002F0x60 [btrfs]\n   submit_extent_folio+0x13f\u002F0x330 [btrfs]\n   ? btrfs_set_range_writeback+0xa3\u002F0xd0 [btrfs]\n   extent_writepage_io+0x18b\u002F0x360 [btrfs]\n   extent_write_locked_range+0x17c\u002F0x340 [btrfs]\n   ? __pfx_end_bbio_data_write+0x10\u002F0x10 [btrfs]\n   run_delalloc_cow+0x71\u002F0xd0 [btrfs]\n   btrfs_run_delalloc_range+0x176\u002F0x500 [btrfs]\n   ? find_lock_delalloc_range+0x119\u002F0x260 [btrfs]\n   writepage_delalloc+0x2ab\u002F0x480 [btrfs]\n   extent_write_cache_pages+0x236\u002F0x7d0 [btrfs]\n   btrfs_writepages+0x72\u002F0x130 [btrfs]\n   do_writepages+0xd4\u002F0x240\n   ? find_held_lock+0x2b\u002F0x80\n   ? wbc_attach_and_unlock_inode+0x12c\u002F0x290\n   ? wbc_attach_and_unlock_inode+0x12c\u002F0x29\n---truncated---","2024-11-09T11:15:00Z",{"cvss_v3.1":10},{"scope":11,"version":12,"baseScore":13,"attackVector":14,"baseSeverity":15,"vectorString":16,"integrityImpact":17,"userInteraction":17,"attackComplexity":18,"availabilityImpact":19,"privilegesRequired":18,"confidentialityImpact":17},"UNCHANGED","3.1",5.5,"LOCAL","MEDIUM","CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H","NONE","LOW","HIGH",false,[22],"CWE-476",[24,25,26,27,28,29],"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*","cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*","cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*","cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*","cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*",[31],"Linux Linux Kernel",[33,34],"https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002F22833d89b780ba0f9f66e19c477e7decf638edce","https:\u002F\u002Fgit.kernel.org\u002Fstable\u002Fc\u002Fd48e1dea3931de64c26717adc2b89743c7ab6594",0.28,0.00214,0.11629,null,{"timestamp":40,"automatable":41,"tech_impact":42,"exploitation":43,"cisa_decision":44,"cisa_remediation_timeline":48},"2025-10-01T20:16:54.858322Z","no","partial","none",{"vector":45,"decision":46,"priority":47},"CISAv1\u002FE:N\u002FA:N\u002FT:P\u002FM:H\u002F2026-10-25T19:38:16.788873\u002F","track_star","medium","60D",[50],{"name":51,"source":52,"tactics":53,"technique_id":55},"Exploitation for Privilege Escalation","attack_vector",[54],"privilege-escalation","T1068",[]]