CVE-2021-47145
Btrfs Invalid Opcode Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON in link_to_fixup_dir While doing error injection testing I got the following panic kernel BUG at fs/btrfs/tree-log.c:1862! invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014 RIP: 0010:link_to_fixup_dir+0xd5/0xe0 RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216 RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0 RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000 RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001 R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800 R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065 FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0 Call Trace: replay_one_buffer+0x409/0x470 ? btree_read_extent_buffer_pages+0xd0/0x110 walk_up_log_tree+0x157/0x1e0 walk_log_tree+0xa6/0x1d0 btrfs_recover_log_trees+0x1da/0x360 ? replay_one_extent+0x7b0/0x7b0 open_ctree+0x1486/0x1720 btrfs_mount_root.cold+0x12/0xea ? __kmalloc_track_caller+0x12f/0x240 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 vfs_kern_mount.part.0+0x71/0xb0 btrfs_mount+0x10d/0x380 ? vfs_parse_fs_string+0x4d/0x90 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 path_mount+0x433/0xa10 __x64_sys_mount+0xe3/0x120 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae We can get -EIO or any number of legitimate errors from btrfs_search_slot(), panicing here is not the appropriate response. The error path for this code handles errors properly, simply return the error.
INFO
Published Date :
March 25, 2024, 9:15 a.m.
Last Modified :
Dec. 20, 2024, 1:54 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47145.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2021-47145 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47145 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 20, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 4.4.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.235 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.193 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.124 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.9 *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 No Types Assigned https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 Patch Changed Reference Type https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 No Types Assigned https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 Patch Changed Reference Type https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 No Types Assigned https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 Patch Changed Reference Type https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 No Types Assigned https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 Patch Changed Reference Type https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa No Types Assigned https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa Patch Changed Reference Type https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa No Types Assigned https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa Patch Changed Reference Type https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf No Types Assigned https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf Patch Changed Reference Type https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf No Types Assigned https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf Patch Changed Reference Type https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a No Types Assigned https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a Patch Changed Reference Type https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a No Types Assigned https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a Patch Changed Reference Type https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d No Types Assigned https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d Patch Changed Reference Type https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d No Types Assigned https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d Patch Changed Reference Type https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c No Types Assigned https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c Patch Changed Reference Type https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c No Types Assigned https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c Patch Changed Reference Type https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 No Types Assigned https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 Patch Changed Reference Type https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 No Types Assigned https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 Added Reference https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 Added Reference https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa Added Reference https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf Added Reference https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a Added Reference https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d Added Reference https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c Added Reference https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 25, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON in link_to_fixup_dir While doing error injection testing I got the following panic kernel BUG at fs/btrfs/tree-log.c:1862! invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014 RIP: 0010:link_to_fixup_dir+0xd5/0xe0 RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216 RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0 RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000 RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001 R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800 R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065 FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0 Call Trace: replay_one_buffer+0x409/0x470 ? btree_read_extent_buffer_pages+0xd0/0x110 walk_up_log_tree+0x157/0x1e0 walk_log_tree+0xa6/0x1d0 btrfs_recover_log_trees+0x1da/0x360 ? replay_one_extent+0x7b0/0x7b0 open_ctree+0x1486/0x1720 btrfs_mount_root.cold+0x12/0xea ? __kmalloc_track_caller+0x12f/0x240 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 vfs_kern_mount.part.0+0x71/0xb0 btrfs_mount+0x10d/0x380 ? vfs_parse_fs_string+0x4d/0x90 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 path_mount+0x433/0xa10 __x64_sys_mount+0xe3/0x120 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae We can get -EIO or any number of legitimate errors from btrfs_search_slot(), panicing here is not the appropriate response. The error path for this code handles errors properly, simply return the error. Added Reference kernel.org https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47145 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47145
weaknesses.