CVE-2026-22991

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-22991
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22991.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-22991
Downstream
Related
Published
2026-01-23T15:24:12.191Z
Modified
2026-03-23T05:07:26.257541184Z
Summary
libceph: make free_choose_arg_map() resilient to partial allocation
Details

In the Linux kernel, the following vulnerability has been resolved:

libceph: make freechoosearg_map() resilient to partial allocation

freechoosearg_map() may dereference a NULL pointer if its caller fails after a partial allocation.

For example, in decodechooseargs(), if allocation of argmap->args fails, execution jumps to the fail label and freechooseargmap() is called. Since argmap->size is updated to a non-zero value before memory allocation, freechooseargmap() will iterate over arg_map->args and dereference a NULL pointer.

To prevent this potential NULL pointer dereference and make freechoosearg_map() more resilient, add checks for pointers before iterating.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22991.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5cf9c4a9959b6273675310d14a834ef14fbca37c
Fixed
9b3730dabcf3764bfe3ff07caf55e641a0b45234
Fixed
851241d3f78a5505224dc21c03d8692f530256b4
Fixed
ec1850f663da64842614c86b20fe734be070c2ba
Fixed
8081faaf089db5280c3be820948469f7c58ef8dd
Fixed
c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf
Fixed
f21c3fdb96833aac2f533506899fe38c19cf49d5
Fixed
e3fe30e57649c551757a02e1cad073c47e1e075e

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22991.json"