{"cve":"CVE-2026-46312","nvd":{"published":"2026-06-08T17:16:50.160","modified":"2026-10-30T13:19:02.560","status":"Modified","description":"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---","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"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"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T13:47:47.119061695+00:00"},"epss":{"cve":"CVE-2026-46312","score":0.00114,"percentile":0.01444,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}