CVE-2024-50037

{"id": "CVE-2024-50037", "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}]}, "published": "2024-10-21T20:15:16.790", "references": [{"url": "https://git.kernel.org/stable/c/5a4a8ea14c54c651ec532a480bd560d0c6e52f3d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fcddc71ec7ecf15b4df3c41288c9cf0b8e886111", "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\ndrm/fbdev-dma: Only cleanup deferred I/O if necessary\n\nCommit 5a498d4d06d6 (\"drm/fbdev-dma: Only install deferred I/O if\nnecessary\") initializes deferred I/O only if it is used.\ndrm_fbdev_dma_fb_destroy() however calls fb_deferred_io_cleanup()\nunconditionally with struct fb_info.fbdefio == NULL. KASAN with the\nout-of-tree Apple silicon display driver posts following warning from\n__flush_work() of a random struct work_struct instead of the expected\nNULL pointer derefs.\n\n[ 22.053799] ------------[ cut here ]------------\n[ 22.054832] WARNING: CPU: 2 PID: 1 at kernel/workqueue.c:4177 __flush_work+0x4d8/0x580\n[ 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\n[ 22.073768] CPU: 2 UID: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.11.2-asahi+ #asahi-dev\n[ 22.075612] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)\n[ 22.077032] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[ 22.078567] pc : __flush_work+0x4d8/0x580\n[ 22.079471] lr : __flush_work+0x54/0x580\n[ 22.080345] sp : ffffc000836ef820\n[ 22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128\n[ 22.082678] x26: dfffc00000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358\n[ 22.084263] x23: ffff80004b7862b8 x22: dfffc00000000000 x21: ffff80005aa1d470\n[ 22.085855] x20: ffff80004b786000 x19: ffff80004b7862a0 x18: 0000000000000000\n[ 22.087439] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005\n[ 22.089030] x14: 1ffff800106ddf0a x13: 0000000000000000 x12: 0000000000000000\n[ 22.090618] x11: ffffb800106ddf0f x10: dfffc00000000000 x9 : 1ffff800106ddf0e\n[ 22.092206] x8 : 0000000000000000 x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000001\n[ 22.093790] x5 : ffffc000836ef728 x4 : 0000000000000000 x3 : 0000000000000020\n[ 22.095368] x2 : 0000000000000008 x1 : 00000000000000aa x0 : 0000000000000000\n[ 22.096955] Call trace:\n[ 22.097505] __flush_work+0x4d8/0x580\n[ 22.098330] flush_delayed_work+0x80/0xb8\n[ 22.099231] fb_deferred_io_cleanup+0x3c/0x130\n[ 22.100217] drm_fbdev_dma_fb_destroy+0x6c/0xe0 [drm_dma_helper]\n[ 22.101559] unregister_framebuffer+0x210/0x2f0\n[ 22.102575] drm_fb_helper_unregister_info+0x48/0x60\n[ 22.103683] drm_fbdev_dma_client_unregister+0x4c/0x80 [drm_dma_helper]\n[ 22.105147] drm_client_dev_unregister+0x1cc/0x230\n[ 22.106217] drm_dev_unregister+0x58/0x570\n[ 22.107125] apple_drm_unbind+0x50/0x98 [appledrm]\n[ 22.108199] component_del+0x1f8/0x3a8\n[ 22.109042] dcp_platform_shutdown+0x24/0x38 [apple_dcp]\n[ 22.110357] platform_shutdown+0x70/0x90\n[ 22.111219] device_shutdown+0x368/0x4d8\n[ 22.112095] kernel_restart+0x6c/0x1d0\n[ 22.112946] __arm64_sys_reboot+0x1c8/0x328\n[ 22.113868] invoke_syscall+0x78/0x1a8\n[ 22.114703] do_el0_svc+0x124/0x1a0\n[ 22.115498] el0_svc+0x3c/0xe0\n[ 22.116181] el0t_64_sync_handler+0x70/0xc0\n[ 22.117110] el0t_64_sync+0x190/0x198\n[ 22.117931] ---[ end trace 0000000000000000 ]---"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/fbdev-dma: Solo limpiar la E/S diferida si es necesario el commit 5a498d4d06d6 (\"drm/fbdev-dma: Solo instalar la E/S diferida si es necesario\") inicializa la E/S diferida solo si se usa. Sin embargo, drm_fbdev_dma_fb_destroy() llama a fb_deferred_io_cleanup() incondicionalmente con struct fb_info.fbdefio == NULL. KASAN con el controlador de pantalla de silicio de Apple fuera del \u00e1rbol publica la siguiente advertencia de __flush_work() de una estructura aleatoria work_struct en lugar de las derefs de puntero NULL esperadas. [ 22.053799] ------------[ cortar aqu\u00ed ]------------ [ 22.054832] ADVERTENCIA: CPU: 2 PID: 1 en kernel/workqueue.c:4177 __flush_work+0x4d8/0x580 [ 22.056597] M\u00f3dulos vinculados en: 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 No contaminado 6.11.2-asahi+ #asahi-dev [ 22.075612] Nombre del hardware: Apple MacBook Pro (13 pulgadas, M2, 2022) (DT) [ 22.077032] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 22.078567] pc : __flush_work+0x4d8/0x580 [ 22.079471] lr : __flush_work+0x54/0x580 [ [22.080345] sp: ffffc000836ef820 [22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128 [22.082678] x26: dfffc0000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358 [22.084263] x23: ffff80004b7862b8 x22: dfffc0000000000 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: 00836ef728 x4: 0000000000000000 x3: 0000000000000020 [22.095368] x2: 00000000000000008 x1: 00000000000000aa x0: 00000000000000000 [ 22.096955] Rastreo de llamadas: [ 22.097505] __flush_work+0x4d8/0x580 [ 22.098330] flush_delayed_work+0x80/0xb8 [ 22.099231] fb_deferred_io_cleanup+0x3c/0x130 [ 22.100217] drm_fbdev_dma_fb_destroy+0x6c/0xe0 [drm_dma_helper] [ 22.101559] anular registro de b\u00fafer de fotogramas+0x210/0x2f0 [ 22.102575] drm_fb_helper_anular registro de informaci\u00f3n+0x48/0x60 [ 22.103683] drm_fbdev_dma_client_unregister+0x4c/0x80 [drm_dma_helper] [ 22.105147] drm_client_dev_unregister+0x1cc/0x230 [ 22.106217] drm_dev_unregister+0x58/0x570 [ 22.107125] apple_drm_unbind+0x50/0x98 [appledrm] [ 22.108199] component_del+0x1f8/0x3a8 [ 22.109042] dcp_platform_shutdown+0x24/0x38 [apple_dcp] [ 22.110357] platform_shutdown+0x70/0x90 [ 22.111219] apagado_dispositivo+0x368/0x4d8 [ 22.112095] reinicio_kernel+0x6c/0x1d0 [ 22.112946] reinicio_del_sistema_arm64+0x1c8/0x328 [ 22.113868] invocar_llamada_al_sistema+0x78/0x1a8 [ 22.114703] hacer_el0_svc+0x124/0x1a0 [ 22.115498] el0_svc+0x3c/0xe0 [ 22.116181] controlador_sincronizaci\u00f3n_el0t_64+0x70/0xc0 [ 22.117110] el0t_64_sync+0x190/0x198 [ 22.117931] ---[ fin de seguimiento 0000000000000000 ]---"}], "lastModified": "2024-10-25T15:43:07.520", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "66F99BD9-E74F-4CC8-834E-B73BD4643C7B", "versionEndExcluding": "6.11.4", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}