CVE-2024-26874 (GCVE-0-2024-26874)
Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2026-05-11 20:05
VLAI
EPSS
VEX
Title
drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip
It's possible that mtk_crtc->event is NULL in
mtk_drm_crtc_finish_page_flip().
pending_needs_vblank value is set by mtk_crtc->event, but in
mtk_drm_crtc_atomic_flush(), it's is not guarded by the same
lock in mtk_drm_finish_page_flip(), thus a race condition happens.
Consider the following case:
CPU1 CPU2
step 1:
mtk_drm_crtc_atomic_begin()
mtk_crtc->event is not null,
step 1:
mtk_drm_crtc_atomic_flush:
mtk_drm_crtc_update_config(
!!mtk_crtc->event)
step 2:
mtk_crtc_ddp_irq ->
mtk_drm_finish_page_flip:
lock
mtk_crtc->event set to null,
pending_needs_vblank set to false
unlock
pending_needs_vblank set to true,
step 2:
mtk_crtc_ddp_irq ->
mtk_drm_finish_page_flip called again,
pending_needs_vblank is still true
//null pointer
Instead of guarding the entire mtk_drm_crtc_atomic_flush(), it's more
efficient to just check if mtk_crtc->event is null before use.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-23 14:01 UTC
Assigner
References
11 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
119f5173628aa7a0c3cf9db83460d40709e8241d , < accdac6b71d5a2b84040c3d2234f53a60edc398e
(git)
Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < dfde84cc6c589f2a9f820f12426d97365670b731 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < 4688be96d20ffa49d2186523ee84f475f316fd49 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < 9beec711a17245b853d64488fd5b739031612340 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < d2bd30c710475b2e29288827d2c91f9e6e2b91d7 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < a3dd12b64ae8373a41a216a0b621df224210860a (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < 9acee29a38b4d4b70f1f583e5ef9a245db4db710 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < 3fc88b246a2fc16014e374040fc15af1d3752535 (git) Affected: 119f5173628aa7a0c3cf9db83460d40709e8241d , < c958e86e9cc1b48cac004a6e245154dfba8e163b (git) |
guessed | |
| Linux | Linux |
Affected:
4.7
Unaffected: 0 , < 4.7 (semver) Unaffected: 4.19.311 , ≤ 4.19.* (semver) Unaffected: 5.4.273 , ≤ 5.4.* (semver) Unaffected: 5.10.214 , ≤ 5.10.* (semver) Unaffected: 5.15.153 , ≤ 5.15.* (semver) Unaffected: 6.1.83 , ≤ 6.1.* (semver) Unaffected: 6.6.23 , ≤ 6.6.* (semver) Unaffected: 6.7.11 , ≤ 6.7.* (semver) Unaffected: 6.8.2 , ≤ 6.8.* (semver) Unaffected: 6.9 , ≤ * (original_commit_for_fix) |
guessed |
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-26874\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:09.670\",\"lastModified\":\"2026-06-17T07:18:34.007\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip\\n\\nIt\u0027s possible that mtk_crtc-\u003eevent is NULL in\\nmtk_drm_crtc_finish_page_flip().\\n\\npending_needs_vblank value is set by mtk_crtc-\u003eevent, but in\\nmtk_drm_crtc_atomic_flush(), it\u0027s is not guarded by the same\\nlock in mtk_drm_finish_page_flip(), thus a race condition happens.\\n\\nConsider the following case:\\n\\nCPU1 CPU2\\nstep 1:\\nmtk_drm_crtc_atomic_begin()\\nmtk_crtc-\u003eevent is not null,\\n step 1:\\n mtk_drm_crtc_atomic_flush:\\n mtk_drm_crtc_update_config(\\n !!mtk_crtc-\u003eevent)\\nstep 2:\\nmtk_crtc_ddp_irq -\u003e\\nmtk_drm_finish_page_flip:\\nlock\\nmtk_crtc-\u003eevent set to null,\\npending_needs_vblank set to false\\nunlock\\n pending_needs_vblank set to true,\\n\\n step 2:\\n mtk_crtc_ddp_irq -\u003e\\n mtk_drm_finish_page_flip called again,\\n pending_needs_vblank is still true\\n //null pointer\\n\\nInstead of guarding the entire mtk_drm_crtc_atomic_flush(), it\u0027s more\\nefficient to just check if mtk_crtc-\u003eevent is null before use.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/mediatek: corrige un fallo del puntero nulo en mtk_drm_crtc_finish_page_flip Es posible que mtk_crtc-\u0026gt;event sea NULL en mtk_drm_crtc_finish_page_flip(). El valor pendiente_needs_vblank lo establece mtk_crtc-\u0026gt;event, pero en mtk_drm_crtc_atomic_flush(), no est\u00e1 protegido por el mismo bloqueo en mtk_drm_finish_page_flip(), por lo que ocurre una condici\u00f3n de carrera. Considere el siguiente caso: CPU1 CPU2 paso 1: mtk_drm_crtc_atomic_begin() mtk_crtc-\u0026gt;event is not null, paso 1: mtk_drm_crtc_atomic_flush: mtk_drm_crtc_update_config( !!mtk_crtc-\u0026gt;event) paso 2: mtk_crtc_ddp_irq -\u0026gt; mtk_drm_finish _page_flip: bloquear mtk_crtc-\u0026gt;evento establecido en nulo, pendiente_needs_vblank configurado en falso desbloqueo pendiente_needs_vblank configurado en verdadero, paso 2: mtk_crtc_ddp_irq -\u0026gt; mtk_drm_finish_page_flip llamado nuevamente, pendiente_needs_vblank sigue siendo verdadero //puntero nulo En lugar de proteger todo el mtk_drm_crtc_atomic_flush(), es m\u00e1s eficiente simplemente verificar si mtk_crtc-\u0026gt;even t es nulo antes de su uso.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/mediatek/mtk_drm_crtc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"accdac6b71d5a2b84040c3d2234f53a60edc398e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"dfde84cc6c589f2a9f820f12426d97365670b731\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"4688be96d20ffa49d2186523ee84f475f316fd49\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"9beec711a17245b853d64488fd5b739031612340\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"d2bd30c710475b2e29288827d2c91f9e6e2b91d7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"a3dd12b64ae8373a41a216a0b621df224210860a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"9acee29a38b4d4b70f1f583e5ef9a245db4db710\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"3fc88b246a2fc16014e374040fc15af1d3752535\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"119f5173628aa7a0c3cf9db83460d40709e8241d\",\"lessThan\":\"c958e86e9cc1b48cac004a6e245154dfba8e163b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/mediatek/mtk_drm_crtc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.311\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.273\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.214\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.153\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.83\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.23\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.11\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8.2\",\"lessThanOrEqual\":\"6.8.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-04-23T14:01:58.775611Z\",\"id\":\"CVE-2024-26874\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2025-11-21T14:46:45+00:00",
"cve": "CVE-2024-26874",
"id": "CVE-2024-26874",
"initial_release_date": "2024-04-17T00:00:00+00:00",
"product_status:known_not_affected": "198",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: drm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26874.json",
"version": "3"
},
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resolved:\\n\\ndrm/mediatek: Fix a null pointer crash in mtk_drm_crtc_finish_page_flip\\n\\nIt\u0027s possible that mtk_crtc-\u003eevent is NULL in\\nmtk_drm_crtc_finish_page_flip().\\n\\npending_needs_vblank value is set by mtk_crtc-\u003eevent, but in\\nmtk_drm_crtc_atomic_flush(), it\u0027s is not guarded by the same\\nlock in mtk_drm_finish_page_flip(), thus a race condition happens.\\n\\nConsider the following case:\\n\\nCPU1 CPU2\\nstep 1:\\nmtk_drm_crtc_atomic_begin()\\nmtk_crtc-\u003eevent is not null,\\n step 1:\\n mtk_drm_crtc_atomic_flush:\\n mtk_drm_crtc_update_config(\\n !!mtk_crtc-\u003eevent)\\nstep 2:\\nmtk_crtc_ddp_irq -\u003e\\nmtk_drm_finish_page_flip:\\nlock\\nmtk_crtc-\u003eevent set to null,\\npending_needs_vblank set to false\\nunlock\\n pending_needs_vblank set to true,\\n\\n step 2:\\n mtk_crtc_ddp_irq -\u003e\\n mtk_drm_finish_page_flip called again,\\n pending_needs_vblank is still true\\n //null pointer\\n\\nInstead of guarding the entire mtk_drm_crtc_atomic_flush(), it\u0027s more\\nefficient to just check if mtk_crtc-\u003eevent is null before use.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:17:23.474Z\"}}}",
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"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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