CVE-2025-71269
btrfs: do not free data reservation in fallback from inline due to -ENOSPC
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Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not free data reservation in fallback from inline due to -ENOSPC If we fail to create an inline extent due to -ENOSPC, we will attempt to go through the normal COW path, reserve an extent, create an ordered extent, etc. However we were always freeing the reserved qgroup data, which is wrong since we will use data. Fix this by freeing the reserved qgroup data in __cow_file_range_inline() only if we are not doing the fallback (ret is <= 0).
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
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/6de3a371a8b9fd095198b1aa68c22cc10a4c6961
- https://git.kernel.org/stable/c/f8da41de0bff9eb1d774a7253da0c9f637c4470a
- https://git.kernel.org/stable/c/3edd1f6c7c520536b62b2904807033597554dbac
- https://git.kernel.org/stable/c/3a9fd45afadec1fbfec72057b9473d509fa8b68c
- https://git.kernel.org/stable/c/0a1fbbd780f04d1b6cf48dd327c866ba937de1c4
References (5)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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