CVE-2024-47705: block: fix potential invalid pointer dereference in blk_add_partition
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: block: fix potential invalid pointer dereference in blk_add_partition The blk_add_partition() function initially used a single if-condition (IS_ERR(part)) to check for errors when adding a partition. This was modified to handle the specific case of -ENXIO separately, allowing the function to proceed without logging the error in this case. However, this change unintentionally left a path where md_autodetect_dev() could be called without confirming that part is a valid pointer. This commit separates the error handling logic by splitting the initial if-condition, improving code readability and handling specific error scenarios explicitly. The function now distinguishes the general error case from -ENXIO without altering the existing behavior of md_autodetect_dev() calls.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.5<5.10.227 | |
| Linux Kernel | >=5.11<5.15.168 | |
| Linux Kernel | >=5.16<6.1.113 | |
| Linux Kernel | >=6.2<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
| debian/linux-6.1 | 6.1.119-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/26e197b7f9240a4ac301dd0ad520c0c697c2ea7d
- https://git.kernel.org/stable/c/4bc4272e2506941c3f3d4fb8b0c659ee814dcf6f
- https://git.kernel.org/stable/c/64cf2a39202ca2d9df5ee70eb310b6141ce2b8ed
- https://git.kernel.org/stable/c/652039ba477c9a4ab43740cf2cb0d068d53508c2
- https://git.kernel.org/stable/c/80f5bfbb80ea1615290dbc24f49d3d8c86db58fe
- https://git.kernel.org/stable/c/afe53ea9b378c376101d99d216f13b6256f75189
- https://git.kernel.org/stable/c/cc4d21d9492db4e534d3e01253cf885c90dd2a8b
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47705
- https://nvd.nist.gov/vuln/detail/CVE-2024-47705
- https://launchpad.net/bugs/cve/CVE-2024-47705
- https://security-tracker.debian.org/tracker/CVE-2024-47705
- https://ubuntu.com/security/CVE-2024-47705
- https://git.kernel.org/linus/26e197b7f9240a4ac301dd0ad520c0c697c2ea7d
Frequently Asked Questions
What is the severity of CVE-2024-47705?
CVE-2024-47705 has a severity level categorized as high due to the potential for invalid pointer dereference.
How do I fix CVE-2024-47705?
To fix CVE-2024-47705, update the Linux kernel to a version that includes the patch, such as 6.1.123-1 or later.
What versions of the Linux kernel are affected by CVE-2024-47705?
CVE-2024-47705 affects multiple Linux kernel versions from 5.5 up to 6.11.2.
Is CVE-2024-47705 already patched in the latest kernel releases?
Yes, CVE-2024-47705 has been patched in the latest kernel releases, including versions like 6.1.123-1.
What consequences can arise if CVE-2024-47705 is exploited?
Exploitation of CVE-2024-47705 could lead to system instability or potential crashes due to invalid memory access.
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