CVE-2024-39487 in Linux
Sumário
de VulDB • 06/06/2026
No kernel do Linux, a seguinte vulnerabilidade foi corrigida:
bonding: Corrige leitura fora dos limites em bond_option_arp_ip_targets_set()
Na função bond_option_arp_ip_targets_set(), se newval->string for uma string vazia, newval->string+1 apontará para o byte após a string, causando uma leitura fora dos limites.
BUG: KASAN: slab-out-of-bounds em strlen+0x7d/0xa0 lib/string.c:418 Leitura de tamanho 1 no endereço ffff8881119c4781 pela tarefa syz-executor665/8107 CPU: 1 PID: 8107 Comm: syz-executor665 Não contaminado 6.7.0-rc7 #1 Nome do hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Rastreamento de chamada:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc1/0x5e0 mm/kasan/report.c:475 kasan_report+0xbe/0xf0 mm/kasan/report.c:588 strlen+0x7d/0xa0 lib/string.c:418 __fortify_strlen include/linux/fortify-string.h:210 [inline]
in4_pton+0xa3/0x3f0 net/core/utils.c:130 bond_option_arp_ip_targets_set+0xc2/0x910 drivers/net/bonding/bond_options.c:1201 __bond_opt_set+0x2a4/0x1030 drivers/net/bonding/bond_options.c:767 __bond_opt_set_notify+0x48/0x150 drivers/net/bonding/bond_options.c:792 bond_opt_tryset_rtnl+0xda/0x160 drivers/net/bonding/bond_options.c:817 bonding_sysfs_store_option+0xa1/0x120 drivers/net/bonding/bond_sysfs.c:156 dev_attr_store+0x54/0x80 drivers/base/core.c:2366 sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x337/0x500 fs/kernfs/file.c:334 call_write_iter include/linux/fs.h:2020 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x96a/0xd80 fs/read_write.c:584 ksys_write+0x122/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b ---[ fim do rastreamento ]---
Corrigido adicionando uma verificação do comprimento da string antes de utilizá-la.
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