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Fencer Vulns
medium 5.5

CVE-2024-46824 json

iommufd: Require drivers to supply the cache_invalidate_user ops

published 2024-09-27 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-42085

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

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

iommufd: Require drivers to supply the cache_invalidate_user 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 : iommufd_hwpt_invalidate+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 iommufd_fops_ioctl+0x154/0x274 __arm64_sys_ioctl+0xac/0xf0 invoke_syscall+0x48/0x110 el0_svc_common.constprop.0+0x40/0xe0 do_el0_svc+0x1c/0x28 el0_svc+0x34/0xb4 el0t_64_sync_handler+0x120/0x12c el0t_64_sync+0x190/0x194

All existing drivers implement this op for nesting, this is mostly a bisection aid.

Patch / fix

  • Linux Linux 6.10.10, 6.11
  • linux Debian 14, Debian 13 6.10.11-1

debian advisories DEBIAN-CVE-2024-46824

  • linux Ubuntu 24.04 LTS 6.8.0-50.51
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1020.22
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1019.21
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1015.19
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1017.17
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1020.23
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1002.4
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1016.18

ubuntu advisories UBUNTU-CVE-2024-46824

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 9 5.14.0-503.14.1.el9_5
  • rv RHEL 9 5.14.0-503.14.1.el9_5
  • perf RHEL 9 5.14.0-503.14.1.el9_5
  • rtla RHEL 9 5.14.0-503.14.1.el9_5
  • bpftool RHEL 9 7.4.0-503.14.1.el9_5
  • libperf RHEL 9 5.14.0-503.14.1.el9_5
  • kernel-rt RHEL 9 5.14.0-503.14.1.el9_5
  • kernel-64k RHEL 9 5.14.0-503.14.1.el9_5

red hat advisories RHSA-2024:9605

  • kernel AlmaLinux 9 5.14.0-503.14.1.el9_5
  • rv AlmaLinux 9 5.14.0-503.14.1.el9_5
  • perf AlmaLinux 9 5.14.0-503.14.1.el9_5
  • rtla AlmaLinux 9 5.14.0-503.14.1.el9_5
  • bpftool AlmaLinux 9 7.4.0-503.14.1.el9_5
  • libperf AlmaLinux 9 5.14.0-503.14.1.el9_5
  • kernel-rt AlmaLinux 9 5.14.0-503.14.1.el9_5
  • kernel-64k AlmaLinux 9 5.14.0-503.14.1.el9_5

almalinux advisories ALSA-2024:9605

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-46824 updated cvss 5.5

kernel: iommufd: Require drivers to supply the cache_invalidate_user ops

  • Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-s390x 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-x86_64 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-aarch64 5.14.0-503.14.1.el9_5, kernel-debuginfo-common-ppc64le 5.14.0-503.14.1.el9_5 Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-503.14.1.el9_5, perf 5.14.0-503.14.1.el9_5, rtla 5.14.0-503.14.1.el9_5, kernel-devel-matched 5.14.0-503.14.1.el9_5, kernel-64k-devel-matched 5.14.0-503.14.1.el9_5, kernel-debug-devel-matched 5.14.0-503.14.1.el9_5, +6 more Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.4.0-503.14.1.el9_5, kernel 5.14.0-503.14.1.el9_5, kernel-64k 5.14.0-503.14.1.el9_5, kernel-core 5.14.0-503.14.1.el9_5, kernel-tools 5.14.0-503.14.1.el9_5, python3-perf 5.14.0-503.14.1.el9_5, +29 more Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-503.14.1.el9_5, kernel-rt-core 5.14.0-503.14.1.el9_5, kernel-rt-modules 5.14.0-503.14.1.el9_5, kernel-rt-debug-core 5.14.0-503.14.1.el9_5, kernel-rt-modules-core 5.14.0-503.14.1.el9_5, kernel-rt-debug-modules 5.14.0-503.14.1.el9_5, +4 more Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-503.14.1.el9_5, kernel-rt-kvm 5.14.0-503.14.1.el9_5, kernel-rt-core 5.14.0-503.14.1.el9_5, kernel-rt-modules 5.14.0-503.14.1.el9_5, kernel-rt-debug-kvm 5.14.0-503.14.1.el9_5, kernel-rt-debug-core 5.14.0-503.14.1.el9_5, +6 more
    fixed: vendor fix RHSA-2024:9605
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.