In the Linux kernel, the following vulnerability has been resolved:
libceph: Use u32 for non-negative values in ceph_monmap_decode()
This patch fixes unnecessary implicit conversions that change signedness
of blob_len and num_mon in ceph_monmap_decode().
Currently blob_len and num_mon are (signed) int variables. They are used
to hold values that are always non-negative and get assigned in
ceph_decode_32_safe(), which is meant to assign u32 values. Both
variables are subsequently used as unsigned values, and the value of
num_mon is further assigned to monmap->num_mon, which is of type u32.
Therefore, both variables should be of type u32. This is especially
relevant for num_mon. If the value read from the incoming message is
very large, it is interpreted as a negative value, and the check for
num_mon > CEPH_MAX_MON does not catch it. This leads to the attempt to
allocate a very large chunk of memory for monmap, which will most likely
fail. In this case, an unnecessary attempt to allocate memory is
performed, and -ENOMEM is returned instead of -EINVAL.
References
Configurations
Configuration 1 (hide)
|
History
21 May 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-908 | |
| References | () https://git.kernel.org/stable/c/08bc6173fd611ad5a40f472bf5f15b92aea0fe40 - Patch | |
| References | () https://git.kernel.org/stable/c/5f2806684b05bd24d05c091083b8e2517ba8ffac - Patch | |
| References | () https://git.kernel.org/stable/c/770444611f047dbfd4517ec0bc1b179d40c2f346 - Patch | |
| References | () https://git.kernel.org/stable/c/86f7060cd638d6eb042e8ed780fb83a59ca0dcb3 - Patch | |
| References | () https://git.kernel.org/stable/c/b268984ae88cb0dcd7a8e8263962c748448e26e8 - Patch | |
| References | () https://git.kernel.org/stable/c/ba0a4df8c563536857dcbf7b4dbd0f2a15f57ace - Patch | |
| References | () https://git.kernel.org/stable/c/ee5588e2bc41acb73f6676c0520420c107cd0140 - Patch |
11 May 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-21 19:16
NVD link : CVE-2026-43405
Mitre link : CVE-2026-43405
CVE.ORG link : CVE-2026-43405
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-908
Use of Uninitialized Resource