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Fencer Vulns
high 7.8

CVE-2024-26656 json

drm/amdgpu: fix use-after-free bug

published 2024-04-02 2 y ago modified 2026-08-05 3 mo ago also EUVD-2024-23918

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

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

drm/amdgpu: fix use-after-free bug

The bug can be triggered by sending a single amdgpu_gem_userptr_ioctl to the AMDGPU DRM driver on any ASICs with an invalid address and size. The bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>. For example the following code:

static void Syzkaller1(int fd) { struct drm_amdgpu_gem_userptr arg; int ret;

arg.addr = 0xffffffffffff0000; arg.size = 0x80000000; /*2 Gb*/ arg.flags = 0x7; ret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, &arg); }

Due to the address and size are not valid there is a failure in amdgpu_hmm_register->mmu_interval_notifier_insert->__mmu_interval_notifier_insert-> check_shl_overflow, but we even the amdgpu_hmm_register failure we still call amdgpu_hmm_unregister into amdgpu_gem_object_free which causes access to a bad address. The following stack is below when the issue is reproduced when Kazan is enabled:

[ +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020 [ +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340 [ +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff <0f> 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80 [ +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246 [ +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b [ +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260 [ +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25 [ +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00 [ +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260 [ +0.000011] FS: 00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000 [ +0.000012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0 [ +0.000010] Call Trace: [ +0.000006] <TASK> [ +0.000007] ? show_regs+0x6a/0x80 [ +0.000018] ? __warn+0xa5/0x1b0 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [ +0.000018] ? report_bug+0x24a/0x290 [ +0.000022] ? handle_bug+0x46/0x90 [ +0.000015] ? exc_invalid_op+0x19/0x50 [ +0.000016] ? asm_exc_invalid_op+0x1b/0x20 [ +0.000017] ? kasan_save_stack+0x26/0x50 [ +0.000017] ? mmu_interval_notifier_remove+0x23b/0x340 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [ +0.000019] ? mmu_interval_notifier_remove+0x23b/0x340 [ +0.000020] ? __pfx_mmu_interval_notifier_remove+0x10/0x10 [ +0.000017] ? kasan_save_alloc_info+0x1e/0x30 [ +0.000018] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? __kasan_kmalloc+0xb1/0xc0 [ +0.000018] ? srso_return_thunk+0x5/0x5f [ +0.000013] ? __kasan_check_read+0x11/0x20 [ +0.000020] amdgpu_hmm_unregister+0x34/0x50 [amdgpu] [ +0.004695] amdgpu_gem_object_free+0x66/0xa0 [amdgpu] [ +0.004534] ? __pfx_amdgpu_gem_object_free+0x10/0x10 [amdgpu] [ +0.004291] ? do_syscall_64+0x5f/0xe0 [ +0.000023] ? srso_return_thunk+0x5/0x5f [ +0.000017] drm_gem_object_free+0x3b/0x50 [drm] [ +0.000489] amdgpu_gem_userptr_ioctl+0x306/0x500 [amdgpu] [ +0.004295] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004270] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? __this_cpu_preempt_check+0x13/0x20 [ +0.000015] ? srso_return_thunk+0x5/0x5f [ +0.000013] ? sysvec_apic_timer_interrupt+0x57/0xc0 [ +0.000020] ? srso_return_thunk+0x5/0x5f [ +0.000014] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ +0.000022] ? drm_ioctl_kernel+0x17b/0x1f0 [drm] [ +0.000496] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004272] ? drm_ioctl_kernel+0x190/0x1f0 [drm] [ +0.000492] drm_ioctl_kernel+0x140/0x1f0 [drm] [ +0.000497] ? __pfx_amdgpu_gem_userptr_ioctl+0x10/0x10 [amdgpu] [ +0.004297] ? __pfx_drm_ioctl_kernel+0x10/0x10 [d ---truncated---

Patch / fix

  • Linux Linux 6.1.132, 6.6.24, 6.7.12, 6.8.3, 6.9
  • linux Debian 12 6.1.133-1
  • linux Debian 14, Debian 13 6.7.12-1

debian advisories DEBIAN-CVE-2024-26656

  • linux Ubuntu 24.04 LTS 6.8.0-35.35
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1009.9
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1008.9
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1004.7
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1006.6
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1008.8
  • linux-raspi Ubuntu 24.04 LTS 6.8.0-1005.5
  • linux-riscv Ubuntu 24.04 LTS 6.8.0-35.35.1

ubuntu advisories UBUNTU-CVE-2024-26656

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 5.14.0-503.11.1.el9_5
  • rv RHEL 9 5.14.0-503.11.1.el9_5
  • perf RHEL 9 5.14.0-503.11.1.el9_5
  • rtla RHEL 9 5.14.0-503.11.1.el9_5
  • bpftool RHEL 9 7.4.0-503.11.1.el9_5
  • libperf RHEL 9 5.14.0-503.11.1.el9_5
  • kernel-rt RHEL 9 5.14.0-503.11.1.el9_5
  • kernel-64k RHEL 9 5.14.0-503.11.1.el9_5

red hat advisories RHSA-2024:9546RHSA-2024:9315RHSA-2024:9498RHSA-2024:9497RHSA-2024:9500RHSA-2024:4211

  • kernel-source Linux Micro 6.0 6.4.0-18.1
  • kernel-default Linux Micro 6.0 6.4.0-18.1
  • kernel-kvmsmall Linux Micro 6.0 6.4.0-18.1
  • kernel-default-base Linux Micro 6.0 6.4.0-17.1.1.51
  • kernel-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.5.1
  • kernel-syms-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.5.1
  • kernel-rt_debug Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.5.1
  • kernel-source-rt Real Time Module 15 SP6, openSUSE Leap 15.6 6.4.0-150600.10.5.1

suse advisories SUSE-SU-2025:20008-1SUSE-SU-2024:2973-1SUSE-SU-2024:2203-1SUSE-SU-2024:2135-1SUSE-SU-2024:1663-1SUSE-SU-2024:1659-1

  • kernel-rt AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-kvm AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-debug-kvm AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.8.1.rt7.349.el8_10

almalinux advisories ALSA-2024:4352ALSA-2024:4211

  • kernel-rt Rocky Linux 8 4.18.0-553.8.1.rt7.349.el8_10
  • kernel Rocky Linux 8 4.18.0-553.8.1.el8_10

rocky linux advisories RLSA-2024:4352RLSA-2024:4211

  • kernel Azure Linux 3.0 6.6.82.1-1

azure linux advisories AZL-58770

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2024-26656 updated cvss 4.7

kernel: drm/amdgpu: use-after-free vulnerability

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 9) libperf 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-s390x 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-x86_64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-aarch64 5.14.0-503.11.1.el9_5, kernel-debuginfo-common-ppc64le 5.14.0-503.11.1.el9_5
    fixed: vendor fix RHSA-2024:9315
  • Red Hat CodeReady Linux Builder EUS (v.8.8) kernel-debuginfo-common-x86_64 4.18.0-477.64.1.el8_8, kernel-debuginfo-common-aarch64 4.18.0-477.64.1.el8_8, kernel-debuginfo-common-ppc64le 4.18.0-477.64.1.el8_8
    fixed: vendor fix RHSA-2024:4740
  • Red Hat CodeReady Linux Builder EUS (v.9.2) kernel-debuginfo-common-s390x 5.14.0-284.92.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.92.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.92.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.92.1.el9_2
    fixed: vendor fix RHSA-2024:9497
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.44.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.44.1.el9_4
    fixed: vendor fix RHSA-2024:9546
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-503.11.1.el9_5, perf 5.14.0-503.11.1.el9_5, rtla 5.14.0-503.11.1.el9_5, kernel-devel-matched 5.14.0-503.11.1.el9_5, kernel-64k-devel-matched 5.14.0-503.11.1.el9_5, kernel-debug-devel-matched 5.14.0-503.11.1.el9_5, +6 more
    fixed: vendor fix RHSA-2024:9315
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) perf 5.14.0-284.92.1.el9_2, rtla 5.14.0-284.92.1.el9_2, kernel-devel-matched 5.14.0-284.92.1.el9_2, kernel-64k-devel-matched 5.14.0-284.92.1.el9_2, kernel-debug-devel-matched 5.14.0-284.92.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.92.1.el9_2, +5 more
    fixed: vendor fix RHSA-2024:9497
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.44.1.el9_4, perf 5.14.0-427.44.1.el9_4, rtla 5.14.0-427.44.1.el9_4, kernel-devel-matched 5.14.0-427.44.1.el9_4, kernel-64k-devel-matched 5.14.0-427.44.1.el9_4, kernel-debug-devel-matched 5.14.0-427.44.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:9546
show 17 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.8.1.el8_10, kernel 4.18.0-553.8.1.el8_10, bpftool 4.18.0-553.8.1.el8_10, kernel-core 4.18.0-553.8.1.el8_10, kernel-tools 4.18.0-553.8.1.el8_10, python3-perf 4.18.0-553.8.1.el8_10, +15 more
    fixed: vendor fix RHSA-2024:4211
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.4.0-503.11.1.el9_5, kernel 5.14.0-503.11.1.el9_5, kernel-64k 5.14.0-503.11.1.el9_5, kernel-core 5.14.0-503.11.1.el9_5, kernel-tools 5.14.0-503.11.1.el9_5, python3-perf 5.14.0-503.11.1.el9_5, +29 more
    fixed: vendor fix RHSA-2024:9315
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.129.1.el8_6, kernel 4.18.0-372.129.1.el8_6, bpftool 4.18.0-372.129.1.el8_6, kernel-core 4.18.0-372.129.1.el8_6, kernel-tools 4.18.0-372.129.1.el8_6, python3-perf 4.18.0-372.129.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.129.1.el8_6, kernel 4.18.0-372.129.1.el8_6, bpftool 4.18.0-372.129.1.el8_6, kernel-core 4.18.0-372.129.1.el8_6, kernel-tools 4.18.0-372.129.1.el8_6, python3-perf 4.18.0-372.129.1.el8_6, +15 more
    fixed: vendor fix RHSA-2024:9500
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) perf 4.18.0-477.64.1.el8_8, kernel 4.18.0-477.64.1.el8_8, bpftool 4.18.0-477.64.1.el8_8, kernel-core 4.18.0-477.64.1.el8_8, kernel-tools 4.18.0-477.64.1.el8_8, python3-perf 4.18.0-477.64.1.el8_8, +15 more
    fixed: vendor fix RHSA-2024:4740
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) bpftool 7.0.0-284.92.1.el9_2, kernel 5.14.0-284.92.1.el9_2, kernel-64k 5.14.0-284.92.1.el9_2, kernel-core 5.14.0-284.92.1.el9_2, kernel-tools 5.14.0-284.92.1.el9_2, python3-perf 5.14.0-284.92.1.el9_2, +28 more
    fixed: vendor fix RHSA-2024:9497
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.44.1.el9_4, kernel 5.14.0-427.44.1.el9_4, kernel-64k 5.14.0-427.44.1.el9_4, kernel-core 5.14.0-427.44.1.el9_4, kernel-tools 5.14.0-427.44.1.el9_4, python3-perf 5.14.0-427.44.1.el9_4, +28 more
    fixed: vendor fix RHSA-2024:9546
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.129.1.el8_6, kernel 4.18.0-372.129.1.el8_6, bpftool 4.18.0-372.129.1.el8_6, kernel-core 4.18.0-372.129.1.el8_6, kernel-tools 4.18.0-372.129.1.el8_6, python3-perf 4.18.0-372.129.1.el8_6, +8 more
    fixed: vendor fix RHSA-2024:9500
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.8.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.8.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.8.1.el8_10
    fixed: vendor fix RHSA-2024:4211
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-kvm 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-core 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-modules 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-kvm 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-core 4.18.0-553.8.1.rt7.349.el8_10, +4 more
    fixed: vendor fix RHSA-2024:4352
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, kernel-rt-modules-core 5.14.0-503.11.1.el9_5, kernel-rt-debug-modules 5.14.0-503.11.1.el9_5, +4 more
    fixed: vendor fix RHSA-2024:9315
  • Red Hat Enterprise Linux Real Time EUS (v.9.2) kernel-rt 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-core 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-modules 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-core 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-modules-core 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-modules 5.14.0-284.92.1.rt14.377.el9_2, +4 more
    fixed: vendor fix RHSA-2024:9498
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.44.1.el9_4, kernel-rt-core 5.14.0-427.44.1.el9_4, kernel-rt-modules 5.14.0-427.44.1.el9_4, kernel-rt-debug-core 5.14.0-427.44.1.el9_4, kernel-rt-modules-core 5.14.0-427.44.1.el9_4, kernel-rt-debug-modules 5.14.0-427.44.1.el9_4, +4 more
    fixed: vendor fix RHSA-2024:9546
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-503.11.1.el9_5, kernel-rt-kvm 5.14.0-503.11.1.el9_5, kernel-rt-core 5.14.0-503.11.1.el9_5, kernel-rt-modules 5.14.0-503.11.1.el9_5, kernel-rt-debug-kvm 5.14.0-503.11.1.el9_5, kernel-rt-debug-core 5.14.0-503.11.1.el9_5, +6 more
    fixed: vendor fix RHSA-2024:9315
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.2) kernel-rt 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-kvm 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-core 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-modules 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-kvm 5.14.0-284.92.1.rt14.377.el9_2, kernel-rt-debug-core 5.14.0-284.92.1.rt14.377.el9_2, +6 more
    fixed: vendor fix RHSA-2024:9498
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt 5.14.0-427.44.1.el9_4, kernel-rt-kvm 5.14.0-427.44.1.el9_4, kernel-rt-core 5.14.0-427.44.1.el9_4, kernel-rt-modules 5.14.0-427.44.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.44.1.el9_4, kernel-rt-debug-core 5.14.0-427.44.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:9546
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-core 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-modules 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-core 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-modules 4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-modules-extra 4.18.0-553.8.1.rt7.349.el8_10, +2 more
    fixed: vendor fix RHSA-2024:4352
  • Red Hat CodeReady Linux Builder (v. 9) kernel-cross-headers 5.14.0-503.11.1.el9_5 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 AppStream (v. 9) kernel-headers 5.14.0-503.11.1.el9_5 Red Hat Enterprise Linux AppStream EUS (v.9.2) kernel-doc 5.14.0-284.92.1.el9_2 Red Hat Enterprise Linux BaseOS (v. 8) kernel-headers 4.18.0-553.8.1.el8_10, kernel-cross-headers 4.18.0-553.8.1.el8_10
    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

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.