CVE-2021-47600
dm btree remove: fix use after free in rebalance_children()
HIGH
7.8
CVSS Score
Published: June 19, 2024 at 02:54 PM UTC
Updated: August 5, 2026 at 09:24 AM UTC
1 product affected across 1 vendorLinux Kernel
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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
Description
In the Linux kernel, the following vulnerability has been resolved: dm btree remove: fix use after free in rebalance_children() Move dm_tm_unlock() after dm_tm_dec().
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 4.4.2963.2 ≤ v < 4.14.2593.2 ≤ v < 4.19.2223.2 ≤ v < 4.4.2963.2 ≤ v < 4.9.2943.2 ≤ v < 5.10.883.2 ≤ v < 5.15.113.2 ≤ v < 5.163.2 ≤ v < 5.4.1684.10 ≤ v < 4.14.2594.15 ≤ v < 4.19.2224.20 ≤ v < 5.4.1684.5 ≤ v < 4.9.2945.11 ≤ v < 5.15.115.5 ≤ v < 5.10.883.23241b1d3e0aaafbfcd320f4d71ade629728cc4f4
Vendor states this is fixed in 0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3 (fixed)
Vendor states this is fixed in 1b8d2789dad0005fd5e7d35dab26a8e1203fb6da (fixed)
Vendor states this is fixed in 293f957be5e39720778fb1851ced7f5fba6d51c3 (fixed)
Vendor states this is fixed in 501ecd90efdc9b2edc6c28852ecd098a4adf8f00 (fixed)
Vendor states this is fixed in 607beb420b3fe23b948a9bf447d993521a02fbbb (fixed)
Vendor states this is fixed in 66ea642af6fd4eacb5d0271a922130fcf8700424 (fixed)
Vendor states this is fixed in a48f6a2bf33734ec5669ee03067dfb6c5b4818d6 (fixed)
Vendor states this is fixed in b03abd0aa09c05099f537cb05b8460c4298f0861 (fixed)
Vendor states this is fixed in 3.2 (unaffected)
Vendor states this is fixed in 4.14.259 (unaffected)
Vendor states this is fixed in 4.19.222 (unaffected)
Vendor states this is fixed in 4.4.296 (unaffected)
Vendor states this is fixed in 4.9.294 (unaffected)
Vendor states this is fixed in 5.10.88 (unaffected)
Vendor states this is fixed in 5.15.11 (unaffected)
Vendor states this is fixed in 5.16 (unaffected)
Vendor states this is fixed in 5.4.168 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3
- https://git.kernel.org/stable/c/1b8d2789dad0005fd5e7d35dab26a8e1203fb6da
- https://git.kernel.org/stable/c/293f957be5e39720778fb1851ced7f5fba6d51c3
- https://git.kernel.org/stable/c/501ecd90efdc9b2edc6c28852ecd098a4adf8f00
- https://git.kernel.org/stable/c/607beb420b3fe23b948a9bf447d993521a02fbbb
References (8)
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/0e21e6cd5eebfc929ac5fa3b97ca2d4ace3cb6a3Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1b8d2789dad0005fd5e7d35dab26a8e1203fb6daPatch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/293f957be5e39720778fb1851ced7f5fba6d51c3Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/501ecd90efdc9b2edc6c28852ecd098a4adf8f00Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/607beb420b3fe23b948a9bf447d993521a02fbbbPatch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/66ea642af6fd4eacb5d0271a922130fcf8700424Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a48f6a2bf33734ec5669ee03067dfb6c5b4818d6Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b03abd0aa09c05099f537cb05b8460c4298f0861SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.8HIGHLinux
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-416
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