SECUFOCUSNOW
Home›CVE index›CVE-2025-39738
Review reviewHigh

CVE-2025-39738

Linux Linux, SIMATIC CN 4100, linux kernel

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not allow relocation of partially dropped subvolumes [BUG] There is an internal report that balance triggered transaction abort, with the following call trace: item 85 key (594509824 169 0) itemoff 12599 itemsize 33 extent refs 1 gen 197740 flags 2 ref#0: tree block backref root 7 item 86 key (594558976 169 0) itemoff 12566 itemsize 33 extent refs 1 gen 197522 flags 2 ref#0: tree block backref root 7 ... BTRFS error (device loop0): extent item not found for insert, bytenr 594526208 num_bytes 16384 parent 449921024...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.09.12
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: btrfs: do not allow relocation of partially dropped subvolumes [BUG] There is an internal report that balance triggered transaction abort, with the following call trace: item 85 key (594509824 169 0) itemoff 12599 itemsize 33 extent refs 1 gen 197740 flags 2 ref#0: tree block backref root 7 item 86 key (594558976 169 0) itemoff 12566 itemsize 33 extent refs 1 gen 197522 flags 2 ref#0: tree block backref root 7 ... BTRFS error (device loop0): extent item not found for insert, bytenr 594526208 num_bytes 16384 parent 449921024...

Affected product and versions

Product
Linux Linux, SIMATIC CN 4100, linux kernel
Affected versions
>= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < fa086b1398cf7e5f7dee7241bd5f2855cb5df8dc, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < fcb1f77b8ed8795608ca7a1f6505e2b07236c1f3, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < f83d4c81bda3b7d1813268ab77408f7a0ce691ff, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < 39a93e1c9dbf7e11632efeb20fcf0fc1dcf64d51, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < 125e94a4b76b7b75d194f85bedd628097d2121f0, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < 4e403bd8e127d40dc7c05f06ee969c1ba1537ec5, >= 638331fa56caeaa8b4d31cc1dfbe0ce989bcff67 < 4289b494ac553e74e86fed1c66b2bf9530bc1082, >= 5.11, < V5.0, >= 5.11.1 < 5.15.190, >= 5.16 < 6.1.149, >= 6.2 < 6.6.103, >= 6.7 < 6.12.43, >= 6.13 < 6.15.11, >= 6.16 < 6.16.2, 5.11, 6.17, 11.0
Fixed versions
5.15.190, 6.1.149, 6.6.103, 6.12.43, 6.15.11, 6.16.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC CN 4100, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available