CVE-2024-26791
btrfs: dev-replace: properly validate device names
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Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: dev-replace: properly validate device names There's a syzbot report that device name buffers passed to device replace are not properly checked for string termination which could lead to a read out of bounds in getname_kernel(). Add a helper that validates both source and target device name buffers. For devid as the source initialize the buffer to empty string in case something tries to read it later. This was originally analyzed and fixed in a different way by Edward Adam Davis (see links).
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/11d7a2e429c02d51e2dc90713823ea8b8d3d3a84
- https://git.kernel.org/stable/c/2886fe308a83968dde252302884a1e63351cf16d
- https://git.kernel.org/stable/c/343eecb4ff49a7b1cc1dfe86958a805cf2341cfb
- https://git.kernel.org/stable/c/9845664b9ee47ce7ee7ea93caf47d39a9d4552c4
- https://git.kernel.org/stable/c/ab2d68655d0f04650bef09fee948ff80597c5fb9
References (10)
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
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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