CVE-2024-39480
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120, CWE-121
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Mailing List, Patch
- https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7Mailing List, Patch
- https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96Mailing List, Patch
- https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8aMailing List, Patch
- https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454Mailing List, Patch
- https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33Mailing List, Patch
- https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7Mailing List, Patch
- https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992Mailing List, Patch
- https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5Mailing List, Patch
- https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7Mailing List, Patch
- https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96Mailing List, Patch
- https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8aMailing List, Patch
- https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454Mailing List, Patch
- https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33Mailing List, Patch
- https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7Mailing List, Patch
- https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992Mailing List, Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.