CVE-2021-47433— btrfs: fix abort logic in btrfs_replace_file_extents
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于btrfs_replace_file_extents 中存在中止逻辑错误。
Possible ATT&CK Techniques 2 AI
T1030 · Data Transfer Size Limits T1499 · Endpoint Denial of ServiceAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 8fccebfa534c7984864394fa03608305e4929aae< 0e32a2b85c7d92ece86c17dfef390c5ed79c6378 |
affected |
8fccebfa534c7984864394fa03608305e4929aae< 0e309e1152fc34ef75991d9d69b165dbf75bf26c |
affected | ||
8fccebfa534c7984864394fa03608305e4929aae< 4afb912f439c4bc4e6a4f3e7547f2e69e354108f |
affected | ||
5.10 |
affected | ||
< 5.10 |
unaffected | ||
5.10.75≤ 5.10.* |
unaffected | ||
5.14.14≤ 5.14.* |
unaffected | ||
5.15≤ * |
unaffected |
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I. Basic Information for CVE-2021-47433
Vulnerability Information
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Vulnerability Title
btrfs: fix abort logic in btrfs_replace_file_extents
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix abort logic in btrfs_replace_file_extents
Error injection testing uncovered a case where we'd end up with a
corrupt file system with a missing extent in the middle of a file. This
occurs because the if statement to decide if we should abort is wrong.
The only way we would abort in this case is if we got a ret !=
-EOPNOTSUPP and we called from the file clone code. However the
prealloc code uses this path too. Instead we need to abort if there is
an error, and the only error we _don't_ abort on is -EOPNOTSUPP and only
if we came from the clone file code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于btrfs_replace_file_extents 中存在中止逻辑错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47433
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47433 (2)
Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total
| CVE-2021-47496 | 9.8 CRITICAL | net/tls: Fix flipped sign in tls_err_abort() calls |
| CVE-2021-47478 | 9.1 CRITICAL | isofs: Fix out of bound access for corrupted isofs image |
| CVE-2021-47450 | 8.8 HIGH | KVM: arm64: Fix host stage-2 PGD refcount |
| CVE-2021-47459 | 7.8 HIGH | can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv |
| CVE-2021-47447 | 7.8 HIGH | drm/msm/a3xx: fix error handling in a3xx_gpu_init() |
| CVE-2021-47446 | 7.8 HIGH | drm/msm/a4xx: fix error handling in a4xx_gpu_init() |
| CVE-2021-47451 | 7.8 HIGH | netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value |
| CVE-2021-47492 | 7.8 HIGH | mm, thp: bail out early in collapse_file for writeback page |
| CVE-2021-47493 | 7.8 HIGH | ocfs2: fix race between searching chunks and release journal_head from buffer_head |
| CVE-2021-47494 | 7.8 HIGH | cfg80211: fix management registrations locking |
| CVE-2021-47461 | 7.8 HIGH | userfaultfd: fix a race between writeprotect and exit_mmap() |
| CVE-2021-47485 | 7.8 HIGH | IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields |
| CVE-2021-47483 | 7.8 HIGH | regmap: Fix possible double-free in regcache_rbtree_exit() |
| CVE-2021-47448 | 7.5 HIGH | mptcp: fix possible stall on recvmsg() |
| CVE-2021-47458 | 7.1 HIGH | ocfs2: mount fails with buffer overflow in strlen |
| CVE-2021-47465 | 7.1 HIGH | KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest() |
| CVE-2021-47438 | 7.1 HIGH | net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path |
| CVE-2021-47473 | scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() | |
| CVE-2021-47480 | scsi: core: Put LLD module refcnt after SCSI device is released | |
| CVE-2021-47475 | comedi: vmk80xx: fix transfer-buffer overflows |
Showing top 20 of 63 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U -
CVE-2026-98865
sched_ext: Don't run ops.dequeue() with a DSQ lock held -
CVE-2026-98864
sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing
Same vendor: Linux
-
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U -
CVE-2026-98865
sched_ext: Don't run ops.dequeue() with a DSQ lock held -
CVE-2026-98864
sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing
V. Comments for CVE-2021-47433
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