{
  "cveId": "CVE-2024-50037",
  "url": "https://patchblox.com/security/cve/CVE-2024-50037",
  "summary": "CVE-2024-50037 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-50037, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/fbdev-dma: Only cleanup deferred I/O if nece...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/fbdev-dma: Only cleanup deferred I/O if necessary  Commit 5a498d4d06d6 (\u0022drm/fbdev-dma: Only install deferred I/O if necessary\u0022) initializes deferred I/O only if it is used. drm_fbdev_dma_fb_destroy() however calls fb_deferred_io_cleanup() unconditionally with struct fb_info.fbdefio == NULL. KASAN with the out-of-tree Apple silicon display driver posts following warning from __flush_work() of a random struct work_struct instead of the expected NULL pointer derefs.  [   22.053799] ------------[ cut here ]------------ [   22.054832] WARNING: CPU: 2 PID: 1 at kernel/workqueue.c:4177 __flush_work\u002B0x4d8/0x580 [   22.056597] Modules linked in: uhid bnep uinput nls_ascii ip6_tables ip_tables i2c_dev loop fuse dm_multipath nfnetlink zram hid_magicmouse btrfs xor xor_neon brcmfmac_wcc raid6_pq hci_bcm4377 bluetooth brcmfmac hid_apple brcmutil nvmem_spmi_mfd simple_mfd_spmi dockchannel_hid cfg80211 joydev regmap_spmi nvme_apple ecdh_generic ecc macsmc_hid rfkill dwc3 appledrm snd_soc_macaudio macsmc_power nvme_core apple_isp phy_apple_atc apple_sart apple_rtkit_helper apple_dockchannel tps6598x macsmc_hwmon snd_soc_cs42l84 videobuf2_v4l2 spmi_apple_controller nvmem_apple_efuses videobuf2_dma_sg apple_z2 videobuf2_memops spi_nor panel_summit videobuf2_common asahi videodev pwm_apple apple_dcp snd_soc_apple_mca apple_admac spi_apple clk_apple_nco i2c_pasemi_platform snd_pcm_dmaengine mc i2c_pasemi_core mux_core ofpart adpdrm drm_dma_helper apple_dart apple_soc_cpufreq leds_pwm phram [   22.073768] CPU: 2 UID: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.11.2-asahi\u002B #asahi-dev [   22.075612] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT) [   22.077032] pstate: 01400005 (nzcv daif \u002BPAN -UAO -TCO \u002BDIT -SSBS BTYPE=--) [   22.078567] pc : __flush_work\u002B0x4d8/0x580 [   22.079471] lr : __flush_work\u002B0x54/0x580 [   22.080345] sp : ffffc000836ef820 [   22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128 [   22.082678] x26: dfffc00000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358 [   22.084263] x23: ffff80004b7862b8 x22: dfffc00000000000 x21: ffff80005aa1d470 [   22.085855] x20: ffff80004b786000 x19: ffff80004b7862a0 x18: 0000000000000000 [   22.087439] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005 [   22.089030] x14: 1ffff800106ddf0a x13: 0000000000000000 x12: 0000000000000000 [   22.090618] x11: ffffb800106ddf0f x10: dfffc00000000000 x9 : 1ffff800106ddf0e [   22.092206] x8 : 0000000000000000 x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000001 [   22.093790] x5 : ffffc000836ef728 x4 : 0000000000000000 x3 : 0000000000000020 [   22.095368] x2 : 0000000000000008 x1 : 00000000000000aa x0 : 0000000000000000 [   22.096955] Call trace: [   22.097505]  __flush_work\u002B0x4d8/0x580 [   22.098330]  flush_delayed_work\u002B0x80/0xb8 [   22.099231]  fb_deferred_io_cleanup\u002B0x3c/0x130 [   22.100217]  drm_fbdev_dma_fb_destroy\u002B0x6c/0xe0 [drm_dma_helper] [   22.101559]  unregister_framebuffer\u002B0x210/0x2f0 [   22.102575]  drm_fb_helper_unregister_info\u002B0x48/0x60 [   22.103683]  drm_fbdev_dma_client_unregister\u002B0x4c/0x80 [drm_dma_helper] [   22.105147]  drm_client_dev_unregister\u002B0x1cc/0x230 [   22.106217]  drm_dev_unregister\u002B0x58/0x570 [   22.107125]  apple_drm_unbind\u002B0x50/0x98 [appledrm] [   22.108199]  component_del\u002B0x1f8/0x3a8 [   22.109042]  dcp_platform_shutdown\u002B0x24/0x38 [apple_dcp] [   22.110357]  platform_shutdown\u002B0x70/0x90 [   22.111219]  device_shutdown\u002B0x368/0x4d8 [   22.112095]  kernel_restart\u002B0x6c/0x1d0 [   22.112946]  __arm64_sys_reboot\u002B0x1c8/0x328 [   22.113868]  invoke_syscall\u002B0x78/0x1a8 [   22.114703]  do_el0_svc\u002B0x124/0x1a0 [   22.115498]  el0_svc\u002B0x3c/0xe0 [   22.116181]  el0t_64_sync_handler\u002B0x70/0xc0 [   22.117110]  el0t_64_sync\u002B0x190/0x198 [   22.117931] ---[ end trace 0000000000000000 ]---",
  "published": "2024-10-21T20:15:16Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00188,
  "epssPercentile": 0.08463,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.11.4-1",
      "fix": "DEBIAN-CVE-2024-50037",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-50037",
      "released": "2024-10-21T20:15:16Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.11.4-1",
      "fix": "DEBIAN-CVE-2024-50037",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-50037",
      "released": "2024-10-21T20:15:16Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}