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CVE-2019-19448

HIGH
7.8
CVSS Score
Published: December 8, 2019 at 01:01 AM UTC
Updated: June 17, 2026 at 02:26 AM UTC
27 products affected across 4 vendorsLinux KernelDebian LinuxUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 2%

Description

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
14.0416.0418.04
Debian Linux· Debiandrupal
95%
9.0
Linux Kernel· Linux
95%
2.6.31 ≤ v < 4.4.2334.10 ≤ v < 4.14.1944.15 ≤ v < 4.19.1414.20 ≤ v < 5.4.604.5.0 ≤ v < 4.9.2335.5.0 ≤ v < 5.7.175.8 ≤ v < 5.8.3
Affected range stops below 4.14.194, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.141, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.233, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.233, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.60, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.7.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.8.3, so it looks safe — our inference, not a vendor statement
A700S Firmware· NetApp
95%
All versions
netapp-a700s (same device)
Active IQ Unified Manager· NetAppnpm
95%
All versions
Aff 8300 Firmware· NetApp
95%
All versions
netapp-aff-8300 (same device)
Aff 8700 Firmware· NetApp
95%
All versions
netapp-aff-8700 (same device)
Aff A400 Firmware· NetApp
95%
All versions
netapp-aff-a400 (same device)
Cloud Backup· NetAppdrupal
95%
All versions
Data Availability Services· NetApp
95%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200103-0001/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4578-1/

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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