CVE-2026-23433
- Source
- https://cve.org/CVERecord?id=CVE-2026-23433
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23433.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-23433
- Downstream
- Published
- 2026-04-03T15:15:18.757Z
- Modified
- 2026-07-08T07:09:45.991584748Z
- Summary
- arm_mpam: Fix null pointer dereference when restoring bandwidth counters
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
arm_mpam: Fix null pointer dereference when restoring bandwidth counters
When an MSC supporting memory bandwidth monitoring is brought offline and then online, mpamrestorembwu_state() calls __rismsmonread() via ipi to restore the configuration of the bandwidth counters. It doesn't care about the value read, mbwu_arg.val, and doesn't set it leading to a null pointer dereference when __rismsmonread() adds to it. This results in a kernel oops with a call trace such as:
Call trace: __rismsmonread+0x19c/0x64c (P) mpamrestorembwustate+0xa0/0xe8 smpcalloncpucallback+0x1c/0x38 processonework+0x154/0x4b4 workerthread+0x188/0x310 kthread+0x11c/0x130 retfromfork+0x10/0x20
Provide a local variable for val to avoid __rismsmonread() dereferencing a null pointer when adding to val.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23433.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/4ad79c874e53ebb7fe3b8ae7ac6c858a2121f415
- https://git.kernel.org/stable/c/ac3e12bc195786d3d44d730b5b2259fd36191848
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23433.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23433
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git