CVE-2024-43854: block: initialize integrity buffer to zero before writing it to media
First published: Sat Aug 17 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: block: initialize integrity buffer to zero before writing it to media Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory. Fix this by adding the __GFP_ZERO flag to allocations for writes.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=2.6.27<5.15.165 | |
| Linux Linux kernel | >=5.16<6.1.103 | |
| Linux Linux kernel | >=6.2<6.6.44 | |
| Linux Linux kernel | >=6.7<6.10.3 | |
| debian/linux | <=5.10.223-1 | 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f
- https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644
- https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005
- https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
- https://git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6
- https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2
- https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1
- https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43854
- https://nvd.nist.gov/vuln/detail/CVE-2024-43854
- https://launchpad.net/bugs/cve/CVE-2024-43854
- https://security-tracker.debian.org/tracker/CVE-2024-43854
- https://ubuntu.com/security/CVE-2024-43854
- https://git.kernel.org/linus/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f
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