| Name | CVE-2024-38543 |
| Description | In the Linux kernel, the following vulnerability has been resolved: lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure The kcalloc() in dmirror_device_evict_chunk() will return null if the physical memory has run out. As a result, if src_pfns or dst_pfns is dereferenced, the null pointer dereference bug will happen. Moreover, the device is going away. If the kcalloc() fails, the pages mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in kcalloc(). Finally, as there is no need to have physically contiguous memory, Switch kcalloc() to kvcalloc() in order to avoid failing allocations. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | fixed |
| buster (security) | 4.19.316-1 | fixed | |
| bullseye (security), bullseye | 5.10.218-1 | vulnerable | |
| bookworm | 6.1.94-1 | fixed | |
| bookworm (security) | 6.1.90-1 | vulnerable | |
| trixie | 6.8.12-1 | fixed | |
| sid | 6.9.7-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | buster | (not affected) | |||
| linux | source | bookworm | 6.1.94-1 | |||
| linux | source | (unstable) | 6.8.12-1 |
[buster] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/c2af060d1c18beaec56351cf9c9bcbbc5af341a3 (6.10-rc1)