CVE-2026-80701
In the Linux kernel, the following vulnerability has been resolved:
drm/vmwgfx: enforce cursor size limits for MOB cursors
vmw_cursor_plane_atomic_check() bounds cursor width and height only on the legacy update path; the SVGA_CAP2_CURSOR_MOB path -- the default on modern hosts -- accepts any size. When the requested size exceeds SVGA_REG_CURSOR_MAX_DIMENSION or SVGA_REG_MOB_MAX_SIZE, vmw_cursor_mob_get() returns -EINVAL and leaves vps->cursor.mob NULL. Its return value is then discarded in vmw_cursor_plane_prepare_fb(), so the subsequent vmw_cursor_update_mob() calls vmw_bo_map_and_cache(NULL) and oopses inside vmw_bo_map_and_cache_size() on the tbo.base.size load.
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Reachable from any DRM master via DRM_IOCTL_MODE_CURSOR2 with a sufficiently large width or height (e.g. cursor_max_dim + 1).
Reject oversized cursors in atomic_check for both MOB-backed cursor update types. The MOB byte-size limit only applies to the SVGA_CAP2_CURSOR_MOB path (vmw_cursor_mob_size() returns 0 for GB_ONLY); compute the required MOB size in 64-bit to avoid overflow when very large dimensions are requested.
In prepare_fb only call vmw_cursor_mob_get()/_map() for VMW_CURSOR_UPDATE_MOB -- the GB_ONLY path uses bo->map.virtual directly and would otherwise be silently downgraded to NONE on hosts without SVGA_CAP2_CURSOR_MOB (where vmw_cursor_mob_get() always returns -EINVAL). Degrade the update to NONE if vmw_cursor_mob_get() or vmw_cursor_mob_map() fails so the update path does not run with a NULL backing MOB.
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-80701",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "965544150d1cadf0e8f5bb6c13c19697e46e1429",
"lessThan": "1eb4f796695be39e0b5c4383350033ced9ade703",
"versionType": "git"
},
{
"status": "affected",
"version": "965544150d1cadf0e8f5bb6c13c19697e46e1429",
"lessThan": "9109b7935b9c058b75348610ef8437c52f9020e3",
"versionType": "git"
},
{
"status": "affected",
"version": "965544150d1cadf0e8f5bb6c13c19697e46e1429",
"lessThan": "d5ed8749168ad13c0dbaa8300f68d854b6076966",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_cursor_plane.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/vmwgfx/vmwgfx_cursor_plane.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-28T08:16:55.640",
"references": [
{
"url": "https://git.kernel.org/stable/c/1eb4f796695be39e0b5c4383350033ced9ade703",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9109b7935b9c058b75348610ef8437c52f9020e3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d5ed8749168ad13c0dbaa8300f68d854b6076966",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: enforce cursor size limits for MOB cursors\n\nvmw_cursor_plane_atomic_check() bounds cursor width and height only\non the legacy update path; the SVGA_CAP2_CURSOR_MOB path -- the\ndefault on modern hosts -- accepts any size. When the requested size\nexceeds SVGA_REG_CURSOR_MAX_DIMENSION or SVGA_REG_MOB_MAX_SIZE,\nvmw_cursor_mob_get() returns -EINVAL and leaves vps->cursor.mob NULL.\nIts return value is then discarded in vmw_cursor_plane_prepare_fb(),\nso the subsequent vmw_cursor_update_mob() calls\nvmw_bo_map_and_cache(NULL) and oopses inside\nvmw_bo_map_and_cache_size() on the tbo.base.size load.\n\nReachable from any DRM master via DRM_IOCTL_MODE_CURSOR2 with a\nsufficiently large width or height (e.g. cursor_max_dim + 1).\n\nReject oversized cursors in atomic_check for both MOB-backed cursor\nupdate types. The MOB byte-size limit only applies to the\nSVGA_CAP2_CURSOR_MOB path (vmw_cursor_mob_size() returns 0 for\nGB_ONLY); compute the required MOB size in 64-bit to avoid overflow\nwhen very large dimensions are requested.\n\nIn prepare_fb only call vmw_cursor_mob_get()/_map() for\nVMW_CURSOR_UPDATE_MOB -- the GB_ONLY path uses bo->map.virtual\ndirectly and would otherwise be silently downgraded to NONE on hosts\nwithout SVGA_CAP2_CURSOR_MOB (where vmw_cursor_mob_get() always\nreturns -EINVAL). Degrade the update to NONE if vmw_cursor_mob_get()\nor vmw_cursor_mob_map() fails so the update path does not run with a\nNULL backing MOB."
}
],
"lastModified": "2026-08-28T08:16:55.640",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}