CVE-2025-38152: remoteproc: core: Clear table_sz when rproc_shutdown
In the Linux kernel, the following vulnerability has been resolved:
remoteproc: core: Clear tablesz when rprocshutdown
There is case as below could trigger kernel dump: Use U-Boot to start remote processor(rproc) with resource table published to a fixed address by rproc. After Kernel boots up, stop the rproc, load a new firmware which doesn't have resource table ,and start rproc.
When starting rproc with a firmware not have resource table, memcpy(loadedtable, rproc->cachedtable, rproc->tablesz) will trigger dump, because rproc->cachetable is set to NULL during the last stop operation, but rproc->tablesz is still valid.
This issue is found on i.MX8MP and i.MX9.
Dump as below: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010af63000 [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 2 UID: 0 PID: 1060 Comm: sh Not tainted 6.14.0-rc7-next-20250317-dirty #38 Hardware name: NXP i.MX8MPlus EVK board (DT) pstate: a0000005 (NzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : pimemcpygeneric+0x110/0x22c lr : rprocstart+0x88/0x1e0 Call trace: pimemcpygeneric+0x110/0x22c (P) rprocboot+0x198/0x57c statestore+0x40/0x104 devattrstore+0x18/0x2c sysfskfwrite+0x7c/0x94 kernfsfopwriteiter+0x120/0x1cc vfswrite+0x240/0x378 ksyswrite+0x70/0x108 arm64syswrite+0x1c/0x28 invokesyscall+0x48/0x10c el0svccommon.constprop.0+0xc0/0xe0 doel0svc+0x1c/0x28 el0svc+0x30/0xcc el0t64synchandler+0x10c/0x138 el0t64sync+0x198/0x19c
Clear rproc->tablesz to address the issue.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Update the Linux kernel remoteproc/rproc code so that it clears rproc->table_sz during rproc_shutdown (“remoteproc: core: Clear table_sz when rproc_shutdown”) and avoids dereferencing a NULL rproc->cache_table when starting rproc with firmware not having a resource table.
Linux kernel remoteproc (remote processor framework) / rproc firmware with resource table rproc resource table handling = Clear rproc->table_sz when shutting down and prevent cache_table NULL dereference when starting rproc with firmware that lacks a resource table
Event History
Frequently Asked Questions
What is the severity of CVE-2025-38152?
CVE-2025-38152 has a moderate severity level as it can lead to a kernel dump under specific conditions.
How do I fix CVE-2025-38152?
To fix CVE-2025-38152, ensure that you update the Linux kernel to the latest stable version that includes patches for this vulnerability.
What systems are affected by CVE-2025-38152?
CVE-2025-38152 affects systems running the Linux kernel, particularly those using the remote processor feature.
What does CVE-2025-38152 entail?
CVE-2025-38152 involves a vulnerability in the Linux kernel's remoteproc component that can trigger kernel dumps when certain conditions are met.
Is CVE-2025-38152 exploitable?
CVE-2025-38152 is potentially exploitable if an attacker can control the initialization of a remote processor with specific resource table configurations.