CVE-2024-26984

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2024-05-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

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

nouveau: fix instmem race condition around ptr stores

Running a lot of VK CTS in parallel against nouveau, once every few hours you might see something like this crash.

BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 8000000114e6e067 P4D 8000000114e6e067 PUD 109046067 PMD 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 53891 Comm: deqp-vk Not tainted 6.8.0-rc6+ #27 Hardware name: Gigabyte Technology Co., Ltd. Z390 I AORUS PRO WIFI/Z390 I AORUS PRO WIFI-CF, BIOS F8 11/05/2021 RIP: 0010:gp100_vmm_pgt_mem+0xe3/0x180 [nouveau] Code: c7 48 01 c8 49 89 45 58 85 d2 0f 84 95 00 00 00 41 0f b7 46 12 49 8b 7e 08 89 da 42 8d 2c f8 48 8b 47 08 41 83 c7 01 48 89 ee <48> 8b 40 08 ff d0 0f 1f 00 49 8b 7e 08 48 89 d9 48 8d 75 04 48 c1 RSP: 0000:ffffac20c5857838 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00000000004d8001 RCX: 0000000000000001 RDX: 00000000004d8001 RSI: 00000000000006d8 RDI: ffffa07afe332180 RBP: 00000000000006d8 R08: ffffac20c5857ad0 R09: 0000000000ffff10 R10: 0000000000000001 R11: ffffa07af27e2de0 R12: 000000000000001c R13: ffffac20c5857ad0 R14: ffffa07a96fe9040 R15: 000000000000001c FS: 00007fe395eed7c0(0000) GS:ffffa07e2c980000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000008 CR3: 000000011febe001 CR4: 00000000003706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:

...

? gp100_vmm_pgt_mem+0xe3/0x180 [nouveau] ? gp100_vmm_pgt_mem+0x37/0x180 [nouveau] nvkm_vmm_iter+0x351/0xa20 [nouveau] ? __pfx_nvkm_vmm_ref_ptes+0x10/0x10 [nouveau] ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau] ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau] ? __lock_acquire+0x3ed/0x2170 ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau] nvkm_vmm_ptes_get_map+0xc2/0x100 [nouveau] ? __pfx_nvkm_vmm_ref_ptes+0x10/0x10 [nouveau] ? __pfx_gp100_vmm_pgt_mem+0x10/0x10 [nouveau] nvkm_vmm_map_locked+0x224/0x3a0 [nouveau]

Adding any sort of useful debug usually makes it go away, so I hand wrote the function in a line, and debugged the asm.

Every so often pt->memory->ptrs is NULL. This ptrs ptr is set in the nv50_instobj_acquire called from nvkm_kmap.

If Thread A and Thread B both get to nv50_instobj_acquire around the same time, and Thread A hits the refcount_set line, and in lockstep thread B succeeds at refcount_inc_not_zero, there is a chance the ptrs value won't have been stored since refcount_set is unordered. Force a memory barrier here, I picked smp_mb, since we want it on all CPUs and it's write followed by a read.

v2: use paired smp_rmb/smp_wmb.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
10.4%
KEV
Not listed

Published

May 1, 2024

Last Modified

November 4, 2025

References (21)

Vendor Advisories for CVE-2024-26984(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(26)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.116.106) @ jammy2026-05-24ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1112.142) @ focal2026-05-24ubuntu
ubuntulinux-tools-iot (5.4.0.1040.38) @ focal2026-05-24ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1068.66) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1008.8) @ noble2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1058.56) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1065.73~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1047 (5.4.0-1047.51) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1065.65) @ jammy2026-05-24ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1065.71~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws (6.8.0-1011.12) @ noble2026-05-24ubuntu
ubuntulinux-tools-azure (4.15.0-1181.196~14.04.1) @ trusty2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.229.241~16.04.1) @ xenial2026-05-24ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-38.38) @ noble2026-05-24ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1075.80~18.04.1) @ bionic2026-05-24ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.189.209~18.04.1) @ bionic2026-05-24ubuntu
ubuntulinux-tools-nvidia-64k (6.8.0-1009.9) @ noble2026-05-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.116.116) @ jammy2026-05-24ubuntu
redhatkernel-rt-0:4.18.0-553.117.1.rt7.458.el8_102026-04-06redhat
redhatkernel-0:4.18.0-553.117.1.el8_102026-04-06redhat
redhatkernel-0:5.14.0-284.95.1.el9_22024-12-04redhat
redhatkernel-rt-0:5.14.0-284.95.1.rt14.380.el9_22024-12-04redhat
redhatkernel-0:5.14.0-427.44.1.el9_42024-11-13redhat
redhatkernel-0:5.14.0-503.11.1.el9_52024-11-12redhat
linuxKernel @ 4.19.313—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(19)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 109 total refreshes for this CVE.

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Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-26984?
CVE-2024-26984 is a medium vulnerability published on May 1, 2024. In the Linux kernel, the following vulnerability has been resolved: nouveau: fix instmem race condition around ptr stores Running a lot of VK CTS in parallel against nouveau, once every few hours you might see something like this crash. BUG: kernel NULL pointer dereference, address:…
When was CVE-2024-26984 disclosed?
CVE-2024-26984 was first published in the National Vulnerability Database on May 1, 2024, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-26984 actively exploited?
CVE-2024-26984 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-26984?
CVE-2024-26984 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-26984?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-26984, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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