CVE-2026-46312

Estado: AnalizadaMedia (5.5)—

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

media: videobuf2: Set vma_flags in vb2_dma_sg_mmap

vb2_dma_contig sets VMA flags VM_DONTEXPAND and VM_DONTDUMP and I do not see a reason why vb2_dma_sg should behave differently. This avoids hitting `WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));` in drm_gem_mmap_obj() during mmap() of an imported dma-buf from the out of tree Apple ISP camera capture driver which uses vb2_dma_sg_memops.

gst-launch-1.0 v4l2src ! gtk4paintablesink

There were discussions in [1] at the end of 2023 that mmap() on imported ---truncated---

Detalles técnicos trazas, registros y código del informe original

[   38.201528] ------------[ cut here ]------------
[   38.202135] WARNING: CPU: 7 PID: 2362 at drivers/gpu/drm/drm_gem.c:1144 drm_gem_mmap_obj+0x1f8/0x210
[   38.203278] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer
snd_seq snd_seq_device uinput nf_conntrack_netbios_ns
nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib
nft_reject_inet nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat
nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables qrtr bnep
nls_ascii i2c_dev loop fuse dm_multipath nfnetlink brcmfmac_wcc
hid_magicmouse hci_bcm4377 brcmfmac brcmutil bluetooth ecdh_generic
cfg80211 ecc btrfs xor xor_neon rfkill hid_apple raid6_pq joydev
aop_als apple_nvmem_spmi industrialio snd_soc_aop apple_z2
snd_soc_cs42l84 tps6598x snd_soc_tas2764 macsmc_reboot spi_nor
macsmc_hwmon rtc_macsmc gpio_macsmc macsmc_power regmap_spmi
macsmc_input dockchannel_hid panel_summit appledrm nvme_apple dwc3
snd_soc_macaudio drm_client_lib nvme_core phy_apple_atc hwmon
apple_sart apple_dockchannel macsmc apple_rtkit_helper
spmi_apple_controller aop apple_wdt mfd_core nvmem_apple_efuses
pinctrl_apple_gpio apple_isp apple_dcp videobuf2_dma_sg mux_core
spi_apple
[   38.203300]  videobuf2_memops i2c_pasemi_platform snd_soc_apple_mca videobuf2_v4l2 videodev clk_apple_nco videobuf2_common snd_pcm_dmaengine adpdrm asahi apple_admac adpdrm_mipi drm_dma_helper pwm_apple i2c_pasemi_core drm_display_helper mc cec apple_dart ofpart apple_soc_cpufreq leds_pwm phram
[   38.217677] CPU: 7 UID: 1000 PID: 2362 Comm: gst-launch-1.0 Tainted: G        W           6.17.6+ #asahi-dev PREEMPT(full)
[   38.219040] Tainted: [W]=WARN
[   38.219398] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)
[   38.220213] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
[   38.221088] pc : drm_gem_mmap_obj+0x1f8/0x210
[   38.221643] lr : drm_gem_mmap_obj+0x78/0x210
[   38.222178] sp : ffffc0008dc678e0
[   38.222579] x29: ffffc0008dc678e0 x28: 0000000000042a97 x27: ffff8000b701b480
[   38.223465] x26: 00000000000000fb x25: ffffc0008dc67d20 x24: ffffc0008dc67968
[   38.224402] x23: ffff8000e3ca5600 x22: ffff8000265b7800 x21: ffff80003000c0c0
[   38.225279] x20: 0000000000000000 x19: ffff8000b68c5200 x18: ffffc0008dc67968
[   38.226151] x17: 0000000000000000 x16: 0000000000000000 x15: ffffc000810a30a8
[   38.227042] x14: 00007fff637effff x13: 00005555de91ffff x12: 00007fff63293fff
[   38.227942] x11: 0000000000000000 x10: ffff8000184ecf08 x9 : ffffc0007a1900c8
[   38.228824] x8 : ffffc0008dc67968 x7 : 0000000000000012 x6 : ffffc0015cf1c000
[   38.229703] x5 : ffffc0008dc676a0 x4 : ffffc00081a27dc0 x3 : 0000000000000038
[   38.230607] x2 : 0000000000000003 x1 : 0000000000000003 x0 : 00000000100000fb
[   38.231488] Call trace:
[   38.231806]  drm_gem_mmap_obj+0x1f8/0x210 (P)
[   38.232342]  drm_gem_mmap+0x140/0x260
[   38.232813]  __mmap_region+0x488/0x9a0
[   38.233277]  mmap_region+0xd0/0x148
[   38.233703]  do_mmap+0x350/0x5c0
[   38.234148]  vm_mmap_pgoff+0x14c/0x200
[   38.234612]  ksys_mmap_pgoff+0x150/0x208
[   38.235107]  __arm64_sys_mmap+0x34/0x50
[   38.235611]  invoke_syscall+0x50/0x120
[   38.236075]  el0_svc_common.constprop.0+0x48/0xf0
[   38.236680]  do_el0_svc+0x24/0x38
[   38.237113]  el0_svc+0x38/0x168
[   38.237507]  el0t_64_sync_handler+0xa0/0xe8
[   38.238034]  el0t_64_sync+0x198/0x1a0
[   38.238491] ---[ end trace 0000000000000000 ]---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
Fecha de la puntuación: 5/10/2026

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)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-46312",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "5ba3f757f0592ca001266b4a6214d0332349909c",
              "lessThan": "feb17524aa4ec337749344be0db52b88663e25ab",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ba3f757f0592ca001266b4a6214d0332349909c",
              "lessThan": "1a1360264f699521e001e7739009ee3ee3c6a4f5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ba3f757f0592ca001266b4a6214d0332349909c",
              "lessThan": "21fade52ab9fb13368a5709e60b0d9909197aeae",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ba3f757f0592ca001266b4a6214d0332349909c",
              "lessThan": "b4cf91658a636618f1437beec971dec25dec28eb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ba3f757f0592ca001266b4a6214d0332349909c",
              "lessThan": "7254b31a13aaa0c2c0f9ffbc335b718656117ff4",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/common/videobuf2/videobuf2-dma-sg.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.39"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.39",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.0.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/common/videobuf2/videobuf2-dma-sg.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-06-08T17:16:50.160",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1a1360264f699521e001e7739009ee3ee3c6a4f5",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/21fade52ab9fb13368a5709e60b0d9909197aeae",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7254b31a13aaa0c2c0f9ffbc335b718656117ff4",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b4cf91658a636618f1437beec971dec25dec28eb",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/feb17524aa4ec337749344be0db52b88663e25ab",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: videobuf2: Set vma_flags in vb2_dma_sg_mmap\n\nvb2_dma_contig sets VMA flags VM_DONTEXPAND and VM_DONTDUMP and I do not\nsee a reason why vb2_dma_sg should behave differently. This avoids\nhitting `WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));` in\ndrm_gem_mmap_obj() during mmap() of an imported dma-buf from the out of\ntree Apple ISP camera capture driver which uses vb2_dma_sg_memops.\n\ngst-launch-1.0 v4l2src ! gtk4paintablesink\n\n[   38.201528] ------------[ cut here ]------------\n[   38.202135] WARNING: CPU: 7 PID: 2362 at drivers/gpu/drm/drm_gem.c:1144 drm_gem_mmap_obj+0x1f8/0x210\n[   38.203278] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer\nsnd_seq snd_seq_device uinput nf_conntrack_netbios_ns\nnf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib\nnft_reject_inet nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat\nnf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables qrtr bnep\nnls_ascii i2c_dev loop fuse dm_multipath nfnetlink brcmfmac_wcc\nhid_magicmouse hci_bcm4377 brcmfmac brcmutil bluetooth ecdh_generic\ncfg80211 ecc btrfs xor xor_neon rfkill hid_apple raid6_pq joydev\naop_als apple_nvmem_spmi industrialio snd_soc_aop apple_z2\nsnd_soc_cs42l84 tps6598x snd_soc_tas2764 macsmc_reboot spi_nor\nmacsmc_hwmon rtc_macsmc gpio_macsmc macsmc_power regmap_spmi\nmacsmc_input dockchannel_hid panel_summit appledrm nvme_apple dwc3\nsnd_soc_macaudio drm_client_lib nvme_core phy_apple_atc hwmon\napple_sart apple_dockchannel macsmc apple_rtkit_helper\nspmi_apple_controller aop apple_wdt mfd_core nvmem_apple_efuses\npinctrl_apple_gpio apple_isp apple_dcp videobuf2_dma_sg mux_core\nspi_apple\n[   38.203300]  videobuf2_memops i2c_pasemi_platform snd_soc_apple_mca videobuf2_v4l2 videodev clk_apple_nco videobuf2_common snd_pcm_dmaengine adpdrm asahi apple_admac adpdrm_mipi drm_dma_helper pwm_apple i2c_pasemi_core drm_display_helper mc cec apple_dart ofpart apple_soc_cpufreq leds_pwm phram\n[   38.217677] CPU: 7 UID: 1000 PID: 2362 Comm: gst-launch-1.0 Tainted: G        W           6.17.6+ #asahi-dev PREEMPT(full)\n[   38.219040] Tainted: [W]=WARN\n[   38.219398] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)\n[   38.220213] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[   38.221088] pc : drm_gem_mmap_obj+0x1f8/0x210\n[   38.221643] lr : drm_gem_mmap_obj+0x78/0x210\n[   38.222178] sp : ffffc0008dc678e0\n[   38.222579] x29: ffffc0008dc678e0 x28: 0000000000042a97 x27: ffff8000b701b480\n[   38.223465] x26: 00000000000000fb x25: ffffc0008dc67d20 x24: ffffc0008dc67968\n[   38.224402] x23: ffff8000e3ca5600 x22: ffff8000265b7800 x21: ffff80003000c0c0\n[   38.225279] x20: 0000000000000000 x19: ffff8000b68c5200 x18: ffffc0008dc67968\n[   38.226151] x17: 0000000000000000 x16: 0000000000000000 x15: ffffc000810a30a8\n[   38.227042] x14: 00007fff637effff x13: 00005555de91ffff x12: 00007fff63293fff\n[   38.227942] x11: 0000000000000000 x10: ffff8000184ecf08 x9 : ffffc0007a1900c8\n[   38.228824] x8 : ffffc0008dc67968 x7 : 0000000000000012 x6 : ffffc0015cf1c000\n[   38.229703] x5 : ffffc0008dc676a0 x4 : ffffc00081a27dc0 x3 : 0000000000000038\n[   38.230607] x2 : 0000000000000003 x1 : 0000000000000003 x0 : 00000000100000fb\n[   38.231488] Call trace:\n[   38.231806]  drm_gem_mmap_obj+0x1f8/0x210 (P)\n[   38.232342]  drm_gem_mmap+0x140/0x260\n[   38.232813]  __mmap_region+0x488/0x9a0\n[   38.233277]  mmap_region+0xd0/0x148\n[   38.233703]  do_mmap+0x350/0x5c0\n[   38.234148]  vm_mmap_pgoff+0x14c/0x200\n[   38.234612]  ksys_mmap_pgoff+0x150/0x208\n[   38.235107]  __arm64_sys_mmap+0x34/0x50\n[   38.235611]  invoke_syscall+0x50/0x120\n[   38.236075]  el0_svc_common.constprop.0+0x48/0xf0\n[   38.236680]  do_el0_svc+0x24/0x38\n[   38.237113]  el0_svc+0x38/0x168\n[   38.237507]  el0t_64_sync_handler+0xa0/0xe8\n[   38.238034]  el0t_64_sync+0x198/0x1a0\n[   38.238491] ---[ end trace 0000000000000000 ]---\n\nThere were discussions in [1] at the end of 2023 that mmap() on imported\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: videobuf2: Establecer vma_flags en vb2_dma_sg_mmap\n\nvb2_dma_contig establece las banderas VMA VM_DONTEXPAND y VM_DONTDUMP y no veo una razón por la que vb2_dma_sg deba comportarse de manera diferente. Esto evita alcanzar 'WARN_ON(!(vma->vm_flags & VM_DONTEXPAND));' en drm_gem_mmap_obj() durante mmap() de un dma-buf importado del controlador de captura de cámara ISP de Apple fuera del árbol que utiliza vb2_dma_sg_memops.\n\ngst-launch-1.0 v4l2src ! gtk4paintablesink\n\n[   38.201528] ------------[ cortar aquí ]------------\n[   38.202135] ADVERTENCIA: CPU: 7 PID: 2362 en drivers/gpu/drm/drm_gem.c:1144 drm_gem_mmap_obj+0x1f8/0x210\n[   38.203278] Módulos enlazados: rfcomm snd_seq_dummy snd_hrtimer\nsnd_seq snd_seq_device uinput nf_conntrack_netbios_ns\nnf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib\nnft_reject_inet nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat\nnf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables qrtr bnep\nnls_ascii i2c_dev loop fuse dm_multipath nfnetlink brcmfmac_wcc\nhid_magicmouse hci_bcm4377 brcmfmac brcmutil bluetooth ecdh_generic\ncfg80211 ecc btrfs xor xor_neon rfkill hid_apple raid6_pq joydev\naop_als apple_nvmem_spmi industrialio snd_soc_aop apple_z2\nsnd_soc_cs42l84 tps6598x snd_soc_tas2764 macsmc_reboot spi_nor\nmacsmc_hwmon rtc_macsmc gpio_macsmc macsmc_power regmap_spmi\nmacsmc_input dockchannel_hid panel_summit appledrm nvme_apple dwc3\nsnd_soc_macaudio drm_client_lib nvme_core phy_apple_atc hwmon\napple_sart apple_dockchannel macsmc apple_rtkit_helper\nspmi_apple_controller aop apple_wdt mfd_core nvmem_apple_efuses\npinctrl_apple_gpio apple_isp apple_dcp videobuf2_dma_sg mux_core\nspi_apple\n[   38.203300]  videobuf2_memops i2c_pasemi_platform snd_soc_apple_mca videobuf2_v4l2 videodev clk_apple_nco videobuf2_common snd_pcm_dmaengine adpdrm asahi apple_admac adpdrm_mipi drm_dma_helper pwm_apple i2c_pasemi_core drm_display_helper mc cec apple_dart ofpart apple_soc_cpufreq leds_pwm phram\n[   38.217677] CPU: 7 UID: 1000 PID: 2362 Comm: gst-launch-1.0 Tainted: G        W           6.17.6+ #asahi-dev PREEMPT(full)\n[   38.219040] Tainted: [W]=ADVERTENCIA\n[   38.219398] Nombre del hardware: Apple MacBook Pro (13-inch, M2, 2022) (DT)\n[   38.220213] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[   38.221088] pc : drm_gem_mmap_obj+0x1f8/0x210\n[   38.221643] lr : drm_gem_mmap_obj+0x78/0x210\n[   38.222178] sp : ffffc0008dc678e0\n[   38.222579] x29: ffffc0008dc678e0 x28: 0000000000042a97 x27: ffff8000b701b480\n[   38.223465] x26: 00000000000000fb x25: ffffc0008dc67d20 x24: ffffc0008dc67968\n[   38.224402] x23: ffff8000e3ca5600 x22: ffff8000265b7800 x21: ffff80003000c0c0\n[   38.225279] x20: 0000000000000000 x19: ffff8000b68c5200 x18: ffffc0008dc67968\n[   38.226151] x17: 0000000000000000 x16: 0000000000000000 x15: ffffc000810a30a8\n[   38.227042] x14: 00007fff637effff x13: 00005555de91ffff x12: 00007fff63293fff\n[   38.227942] x11: 0000000000000000 x10: ffff8000184ecf08 x9 : ffffc0007a1900c8\n[   38.228824] x8 : ffffc0008dc67968 x7 : 0000000000000012 x6 : ffffc0015cf1c000\n[   38.229703] x5 : ffffc0008dc676a0 x4 : ffffc00081a27dc0 x3 : 0000000000000038\n[   38.230607] x2 : 0000000000000003 x1 : 0000000000000003 x0 : 00000000100000fb\n[   38.231488] Traza de llamada:\n[   38.231806]  drm_gem_mmap_obj+0x1f8/0x210 (P)\n[   38.232342]  drm_gem_mmap+0x140/0x260\n[   38.232813]  __mmap_region+0x488/0x9a0\n[   38.233277]  mmap_region+0xd0/0x148\n[   38.233703]  do_mmap+0x350/0x5c0\n[   38.234148]  vm_mmap_pgoff+0x14c/0x200\n[   38.234612]  ksys_mmap_pgoff+0x150/0x208\n[   38.235107]  __arm64_sys_mmap+0x34/0x50\n[   38.235611]  invoke_syscall+0x50/0x120\n[   38.236075]  el0_svc_common.constprop.0+0x48/0xf0\n[   38.236680]  do_el0_svc+0x24/0x38\n[   38.237113]  el0_svc+0x38/0x168\n[   38.237507]  el0t_64_sync_handler+0xa0/0xe8\n[   38.238034]  el0t_64_sync+0x198/0x1a0\n[   38.238491] ---[ fin de la traza 0000000000000000 ]---\n\nHubo discusiones en [1] a finales de 2023 que mmap() en importado ---truncado---"
    }
  ],
  "lastModified": "2026-07-23T07:10:00.113",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CAC2E7BE-0901-4354-9F17-4B2D83360D14",
              "versionEndExcluding": "6.6.140",
              "versionStartIncluding": "2.6.39"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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