CVE-2026-46312 - Vulnerability Details

- media: videobuf2: Set vma_flags in vb2_dma_sg_mmap

Description

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

[ 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 ]---

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

Published: 2026-06-08

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The Linux kernel had an oversight in the videobuf2 DMA scatter‑gather memory operations: the vb2_dma_sg_mmap function failed to set several virtual memory area flags (VM_DONTEXPAND and VM_DONTDUMP). This omission caused a WARN_ON to fire inside drm_gem_mmap_obj when an imported dma‑buffer was mapped, which could result in kernel warnings and, in extreme cases, a denial of service by preventing the mapping of certain buffers. The bug does not provide a path to arbitrary code execution; its impact is limited to kernel stability and availability.

Affected Systems

All Linux kernel builds assembled before the vb2_dma_sg_mmap fix are vulnerable. The patch is included in later kernel commits as shown in references; any system loading drivers that use the videobuf2_dma_sg-memory ops (e.g., Apple ISP camera capture drivers) without a newer kernel is affected.

Risk and Exploitability

The CVSS score of 5.5 reflects moderate impact. The EPSS score is < 1%, indicating a very low probability of exploitation. KEV does not list the issue. The flaw is local, requiring control over a driver that uses videobuf2_dma_sg memory ops. The only impact is kernel warnings that could lead to denial of service, but it does not provide a path to arbitrary code execution.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`5ba3f757f0592ca001266b4a6214d0332349909c`	affected	< feb17524aa4ec337749344be0db52b88663e25ab
`5ba3f757f0592ca001266b4a6214d0332349909c`	affected	< 1a1360264f699521e001e7739009ee3ee3c6a4f5
`5ba3f757f0592ca001266b4a6214d0332349909c`	affected	< 21fade52ab9fb13368a5709e60b0d9909197aeae
`5ba3f757f0592ca001266b4a6214d0332349909c`	affected	< b4cf91658a636618f1437beec971dec25dec28eb
`5ba3f757f0592ca001266b4a6214d0332349909c`	affected	< 7254b31a13aaa0c2c0f9ffbc335b718656117ff4

Linux

affected

Version	Status	Constraints
`2.6.39`	affected	—
`0`	unaffected	< 2.6.39
`6.6.140`	unaffected	≤ 6.6.*
`6.12.90`	unaffected	≤ 6.12.*
`6.18.32`	unaffected	≤ 6.18.*
`7.0.9`	unaffected	≤ 7.0.*
`7.1`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[5ba3f757f0592ca001266b4a6214d0332349909c,feb17524aa4ec337749344be0db52b88663e25ab)`	affected	code_commit	—
`[5ba3f757f0592ca001266b4a6214d0332349909c,1a1360264f699521e001e7739009ee3ee3c6a4f5)`	affected	code_commit	—
`[5ba3f757f0592ca001266b4a6214d0332349909c,21fade52ab9fb13368a5709e60b0d9909197aeae)`	affected	code_commit	—
`[5ba3f757f0592ca001266b4a6214d0332349909c,b4cf91658a636618f1437beec971dec25dec28eb)`	affected	code_commit	—
`[5ba3f757f0592ca001266b4a6214d0332349909c,7254b31a13aaa0c2c0f9ffbc335b718656117ff4)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.39`	affected	semver	—
`[0,2.6.39)`	unaffected	semver	—
`[6.6.140,7.0.0)`	unaffected	semver	—
`[6.12.90,7.0.0)`	unaffected	semver	—
`[6.18.32,7.0.0)`	unaffected	semver	—
`[7.0.9,8.0.0)`	unaffected	semver	—
`[7.1-rc1,*]`	unaffected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Update the Linux kernel to a version that includes the vb2_dma_sg_mmap patch (commits 1a1360264f6 and related).
If an immediate kernel upgrade is not possible, disable or replace drivers that rely on videobuf2_dma_sg memory ops until a safe kernel revision is available.
Monitor system logs for repeated WARN_ON messages from drm_gem_mmap_obj and, when such warnings occur, consider isolating affected processes or performing a reboot to restore stability.

Generated by OpenCVE AI on August 13, 2026 at 20:31 UTC.

Tracking

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Advisories

Source	ID	Title
Ubuntu USN	USN-8566-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8567-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8568-1	Linux kernel (OEM) vulnerabilities
Ubuntu USN	USN-8569-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-8574-1	Linux kernel (GCP FIPS) vulnerabilities
Ubuntu USN	USN-8593-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8574-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8595-1	Linux kernel (Oracle) vulnerabilities
Ubuntu USN	USN-8596-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8595-2	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8603-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8606-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8607-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8608-1	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8609-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8574-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8595-3	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8618-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8619-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-8663-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8664-1	Linux kernel (NVIDIA BaseOS) vulnerabilities
Ubuntu USN	USN-8665-1	Linux kernel (Raspberry Pi) vulnerabilities

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00114.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/1a1360264f699521e001e7739009ee3ee3c6a4f5
https://git.kernel.org/stable/c/21fade52ab9fb13368a5709e60b0d9909197aeae
https://git.kernel.org/stable/c/7254b31a13aaa0c2c0f9ffbc335b718656117ff4
https://git.kernel.org/stable/c/b4cf91658a636618f1437beec971dec25dec28eb
https://git.kernel.org/stable/c/feb17524aa4ec337749344be0db52b88663e25ab
https://lore.kernel.org/linux-cve-announce/2026060853-CVE-2026-46312-a367@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-46312
https://www.cve.org/CVERecord?id=CVE-2026-46312

History

Tue, 09 Jun 2026 02:30:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-398 CWE-863

Tue, 09 Jun 2026 00:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-628
References		https://lore.kernel.org/linux-cve-announce/2026060853-CVE-2026-46312-a367@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-46312 https://www.cve.org/CVERecord?id=CVE-2026-46312
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Mon, 08 Jun 2026 19:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-398 CWE-863

Mon, 08 Jun 2026 17:00:00 +0000

Type	Values Removed	Values Added
Description		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 [ 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 ]--- There were discussions in [1] at the end of 2023 that mmap() on imported ---truncated---
Title		media: videobuf2: Set vma_flags in vb2_dma_sg_mmap
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/1a1360264f699521e001e7739009ee3ee3c6a4f5 https://git.kernel.org/stable/c/21fade52ab9fb13368a5709e60b0d9909197aeae https://git.kernel.org/stable/c/7254b31a13aaa0c2c0f9ffbc335b718656117ff4 https://git.kernel.org/stable/c/b4cf91658a636618f1437beec971dec25dec28eb https://git.kernel.org/stable/c/feb17524aa4ec337749344be0db52b88663e25ab

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Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-06-08T15:50:42.964Z

Updated: 2026-06-14T18:08:26.067Z

Reserved: 2026-05-13T15:03:33.111Z

Link: CVE-2026-46312

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2026-06-08T17:16:50.160

Modified: 2026-07-23T07:10:00.113

Link: CVE-2026-46312

Redhat

Severity : Moderate

Publid Date: 2026-06-08T00:00:00Z

Links: CVE-2026-46312 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-13T20:45:02Z

Weaknesses

CWE-628
Function Call with Incorrectly Specified Arguments
NVD-CWE-noinfo

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

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