Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19, < 4.19.316 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Mailing ListPatch
- https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7Mailing ListPatch
- https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96Mailing ListPatch
- https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8aMailing ListPatch
- https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454Mailing ListPatch
- https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33Mailing ListPatch
- https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7Mailing ListPatch
- https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992Mailing ListPatch
- https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Mailing ListPatch
- https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7Mailing ListPatch
- https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96Mailing ListPatch
- https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8aMailing ListPatch
- https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454Mailing ListPatch
- https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33Mailing ListPatch
- https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7Mailing ListPatch
FAQ
What is CVE-2024-39480?
CVE-2024-39480 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use st...
How severe is CVE-2024-39480?
CVE-2024-39480 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-39480?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.