Vulnerabilidad en kernel de Linux (CVE-2024-26941)

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/dp: Se corrigió la regresión de división por cero en DP MST desconectar con nouveau Se corrigió una regresión al usar nouveau y desconectar un concentrador MST StarTech MSTDP122DP DisplayPort 1.2 (la misma regresión no aparecen cuando se utiliza un concentrador Cable Matters DisplayPort 1.4 MST). Seguimiento: error de división: 0000 [#1] PREEMPT SMP PTI CPU: 7 PID: 2962 Comm: Xorg Not tainted 6.8.0-rc3+ #744 Nombre de hardware: Razer Blade/DANA_MB, BIOS 01.01 31/08/2018 RIP: 0010: drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] Código: c6 b8 01 00 00 00 75 61 01 c6 41 0f af f3 41 0f af f1 c1 e1 04 48 63 c7 31 d2 89 ff 48 8b 5d f8 c9 48 0f af f1 48 8d 44 06 y siguientes <48> f7 f7 31 d2 31 c9 31 f6 31 ff 45 31 c0 45 31 c9 45 31 d2 45 31 RSP: 0018:ffffb2c5c211fa30 EFLAGS: 00010206 RAX: ffffffffffffffff RBX: 000000000 RCX: 0000000000f59b00 RDX: 0000000000000000 RSI: 0000000000000000 RDI : 0000000000000000 RBP: ffffb2c5c211fa48 R08: 0000000000000001 R09: 0000000000000020 R10: 00000000000000004 R11: 0000000000000000 R12: 0000000000023b4a R13: ffff91d37d165800 R14: ffff91d36fac6d80 R15: ffff91d34a764010 FS: 00007f4a1ca3fa80(0000) GS:ffff91d6edbc0000(0000) 00000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559491d49000 CR3: 000000011d180002 CR4: 00000000003706f0 Seguimiento de llamadas: ? show_regs+0x6d/0x80? morir+0x37/0xa0? do_trap+0xd4/0xf0? do_error_trap+0x71/0xb0? drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] ? exc_divide_error+0x3a/0x70? drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] ? asm_exc_divide_error+0x1b/0x20? drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] ? drm_dp_calc_pbn_mode+0x2e/0x70 [drm_display_helper] nv50_msto_atomic_check+0xda/0x120 [nuevo] drm_atomic_helper_check_modeset+0xa87/0xdf0 [drm_kms_helper] drm_atomic_helper_check+0x19/0xa0 [drm_km s_helper] nv50_disp_atomic_check+0x13f/0x2f0 [nuevo] drm_atomic_check_only+0x668/0xb20 [drm]? drm_connector_list_iter_next+0x86/0xc0 [drm] drm_atomic_commit+0x58/0xd0 [drm] ? __pfx___drm_printfn_info+0x10/0x10 [drm] drm_atomic_connector_commit_dpms+0xd7/0x100 [drm] drm_mode_obj_set_property_ioctl+0x1c5/0x450 [drm] ? __pfx_drm_connector_property_set_ioctl+0x10/0x10 [drm] drm_connector_property_set_ioctl+0x3b/0x60 [drm] drm_ioctl_kernel+0xb9/0x120 [drm] drm_ioctl+0x2d0/0x550 [drm] ? __pfx_drm_connector_property_set_ioctl+0x10/0x10 [drm] nouveau_drm_ioctl+0x61/0xc0 [nuevo] __x64_sys_ioctl+0xa0/0xf0 do_syscall_64+0x76/0x140 ? do_syscall_64+0x85/0x140? do_syscall_64+0x85/0x140 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7f4a1cd1a94f Código: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00 RSP: 002b:00007ffd2f1df520 EFLAGS: 0246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffd2f1df5b0 RCX: 00007f4a1cd1a94f RDX: 00007ffd2f1df5b0 RSI: 00000000c01064ab RDI: 000000000000000f RBP: 00000000c01064ab R08: 000056347932deb8 R09: 00056347a7d99c0 R10: 0000000000000000 R11: 0000000000000246 R12: 000056347938a220 R13: 0000000000000000f R14: 0000563479d9f3f0 0000000000000000 Módulos vinculados en: rfcomm xt_conntrack nft_chain_nat xt_masquerade nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo Xad_addrtype nft_compat nf_tables nfnetlink br_netfilter puente stp llc ccm cmac alkh_ overkh_ overkh_ overkh_ overkh_ overgh_ upny _alg bnep binfmt_misc snd_sof_pci_intel_cnl snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof_intel_hda SOC_ACPP SOCPI SND_SOC_CORE SND_COMPRESS SND_SOF_INTEL_INTEL_HDA_MLINK SND_HDA_EXT_CORE IWLMVM Intel_raPl_MMSR Intel_raPl_Common Intel_tccc_Cooling x86_pkg_temp_Thermal Intel_PowerClAMCCLAMCCLAMCCLAMCO11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111. a_codec_hdmi kvm snd_hda_ ---truncado---