CVE-2024-46824
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-46824
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46824.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-46824
- Downstream
- Related
- Published
- 2024-09-27T13:15:14Z
- Modified
- 2025-08-09T19:01:26Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Require drivers to supply the cacheinvalidateuser ops
If drivers don't do this then iommufd will oops invalidation ioctls with something like:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000086000004 EC = 0x21: IABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault user pgtable: 4k pages, 48-bit VAs, pgdp=0000000101059000 [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000086000004 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 371 Comm: qemu-system-aar Not tainted 6.8.0-rc7-gde77230ac23a #9 Hardware name: linux,dummy-virt (DT) pstate: 81400809 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=-c) pc : 0x0 lr : iommufdhwptinvalidate+0xa4/0x204 sp : ffff800080f3bcc0 x29: ffff800080f3bcf0 x28: ffff0000c369b300 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 00000000c1e334a0 x21: ffff0000c1e334a0 x20: ffff800080f3bd38 x19: ffff800080f3bd58 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff8240d6d8 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000001000000002 x7 : 0000fffeac1ec950 x6 : 0000000000000000 x5 : ffff800080f3bd78 x4 : 0000000000000003 x3 : 0000000000000002 x2 : 0000000000000000 x1 : ffff800080f3bcc8 x0 : ffff0000c6034d80 Call trace: 0x0 iommufdfopsioctl+0x154/0x274 _arm64sysioctl+0xac/0xf0 invokesyscall+0x48/0x110 el0svccommon.constprop.0+0x40/0xe0 doel0svc+0x1c/0x28 el0svc+0x34/0xb4 el0t64synchandler+0x120/0x12c el0t64sync+0x190/0x194
All existing drivers implement this op for nesting, this is mostly a bisection aid.
- References