一、漏洞信息
漏洞编号：CVE-2024-56658
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.4.0,6.6.0
CVSS V3.0分值：
BaseScore：7.8 High
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:net: defer final struct net free in netns dismantleIlya reported a slab-use-after-free in dst_destroy [1]Issue is in xfrm6_net_init() and xfrm4_net_init() :They copy xfrm[46]_dst_ops_template into net->xfrm.xfrm[46]_dst_ops.But net structure might be freed before all the dst callbacks arecalled. So when dst_destroy() calls later :if (dst->ops->destroy) dst->ops->destroy(dst);dst->ops points to the old net->xfrm.xfrm[46]_dst_ops, which has been freed.See a relevant issue fixed in :ac888d58869b ( net: do not delay dst_entries_add() in dst_release() )A fix is to queue the struct net to be freed after oneanother cleanup_net() round (and existing rcu_barrier())[1]BUG: KASAN: slab-use-after-free in dst_destroy (net/core/dst.c:112)Read of size 8 at addr ffff8882137ccab0 by task swapper/37/0Dec 03 05:46:18 kernel:CPU: 37 UID: 0 PID: 0 Comm: swapper/37 Kdump: loaded Not tainted 6.12.0 #67Hardware name: Red Hat KVM/RHEL, BIOS 1.16.1-1.el9 04/01/2014Call Trace: dump_stack_lvl (lib/dump_stack.c:124)print_address_description.constprop.0 (mm/kasan/report.c:378)? dst_destroy (net/core/dst.c:112)print_report (mm/kasan/report.c:489)? dst_destroy (net/core/dst.c:112)? kasan_addr_to_slab (mm/kasan/common.c:37)kasan_report (mm/kasan/report.c:603)? dst_destroy (net/core/dst.c:112)? rcu_do_batch (kernel/rcu/tree.c:2567)dst_destroy (net/core/dst.c:112)rcu_do_batch (kernel/rcu/tree.c:2567)? __pfx_rcu_do_batch (kernel/rcu/tree.c:2491)? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406)rcu_core (kernel/rcu/tree.c:2825)handle_softirqs (kernel/softirq.c:554)__irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637)irq_exit_rcu (kernel/softirq.c:651)sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702)RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:743)Code: 00 4d 29 c8 4c 01 c7 4c 29 c2 e9 6e ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 90 0f 00 2d c7 c9 27 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90RSP: 0018:ffff888100d2fe00 EFLAGS: 00000246RAX: 00000000001870ed RBX: 1ffff110201a5fc2 RCX: ffffffffb61a3e46RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb3d4d123RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed11c7e1835dR10: ffff888e3f0c1aeb R11: 0000000000000000 R12: 0000000000000000R13: ffff888100d20000 R14: dffffc0000000000 R15: 0000000000000000? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:148)? cpuidle_idle_call (kernel/sched/idle.c:186)default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118)cpuidle_idle_call (kernel/sched/idle.c:186)? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168)? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5848)? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59)do_idle (kernel/sched/idle.c:326)cpu_startup_entry (kernel/sched/idle.c:423 (discriminator 1))start_secondary (arch/x86/kernel/smpboot.c:202 arch/x86/kernel/smpboot.c:282)? __pfx_start_secondary (arch/x86/kernel/smpboot.c:232)? soft_restart_cpu (arch/x86/kernel/head_64.S:452)common_startup_64 (arch/x86/kernel/head_64.S:414) Dec 03 05:46:18 kernel:Allocated by task 12184:kasan_save_stack (mm/kasan/common.c:48)kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69)__kasan_slab_alloc (mm/kasan/common.c:319 mm/kasan/common.c:345)kmem_cache_alloc_noprof (mm/slub.c:4085 mm/slub.c:4134 mm/slub.c:4141)copy_net_ns (net/core/net_namespace.c:421 net/core/net_namespace.c:480)create_new_namespaces---truncated---
漏洞公开时间：2024-12-27 23:15:25
漏洞创建时间：2025-02-22 11:28:00
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2024-56658

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

二、漏洞分析结构反馈
影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:net: defer final struct net free in netns dismantleIlya reported a slab-use-after-free in dst_destroy [1]Issue is in xfrm6_net_init() and xfrm4_net_init() :They copy xfrm[46]_dst_ops_template into net->xfrm.xfrm[46]_dst_ops.But net structure might be freed before all the dst callbacks arecalled. So when dst_destroy() calls later :if (dst->ops->destroy)dst->ops->destroy(dst);dst->ops points to the old net->xfrm.xfrm[46]_dst_ops, which has been freed.See a relevant issue fixed in :ac888d58869b ( net: do not delay dst_entries_add() in dst_release() )A fix is to queue the struct net to be freed after oneanother cleanup_net() round (and existing rcu_barrier())[1]BUG: KASAN: slab-use-after-free in dst_destroy (net/core/dst.c:112)Read of size 8 at addr ffff8882137ccab0 by task swapper/37/0Dec 03 05:46:18 kernel:CPU: 37 UID: 0 PID: 0 Comm: swapper/37 Kdump: loaded Not tainted 6.12.0 #67Hardware name: Red Hat KVM/RHEL, BIOS 1.16.1-1.el9 04/01/2014Call Trace:dump_stack_lvl (lib/dump_stack.c:124)print_address_description.constprop.0 (mm/kasan/report.c:378)? dst_destroy (net/core/dst.c:112)print_report (mm/kasan/report.c:489)? dst_destroy (net/core/dst.c:112)? kasan_addr_to_slab (mm/kasan/common.c:37)kasan_report (mm/kasan/report.c:603)? dst_destroy (net/core/dst.c:112)? rcu_do_batch (kernel/rcu/tree.c:2567)dst_destroy (net/core/dst.c:112)rcu_do_batch (kernel/rcu/tree.c:2567)? __pfx_rcu_do_batch (kernel/rcu/tree.c:2491)? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406)rcu_core (kernel/rcu/tree.c:2825)handle_softirqs (kernel/softirq.c:554)__irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637)irq_exit_rcu (kernel/softirq.c:651)sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049)asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702)RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:743)Code: 00 4d 29 c8 4c 01 c7 4c 29 c2 e9 6e ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 90 0f 00 2d c7 c9 27 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90RSP: 0018:ffff888100d2fe00 EFLAGS: 00000246RAX: 00000000001870ed RBX: 1ffff110201a5fc2 RCX: ffffffffb61a3e46RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb3d4d123RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed11c7e1835dR10: ffff888e3f0c1aeb R11: 0000000000000000 R12: 0000000000000000R13: ffff888100d20000 R14: dffffc0000000000 R15: 0000000000000000? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:148)? cpuidle_idle_call (kernel/sched/idle.c:186)default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118)cpuidle_idle_call (kernel/sched/idle.c:186)? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168)? lock_release (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5848)? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59)do_idle (kernel/sched/idle.c:326)cpu_startup_entry (kernel/sched/idle.c:423 (discriminator 1))start_secondary (arch/x86/kernel/smpboot.c:202 arch/x86/kernel/smpboot.c:282)? __pfx_start_secondary (arch/x86/kernel/smpboot.c:232)? soft_restart_cpu (arch/x86/kernel/head_64.S:452)common_startup_64 (arch/x86/kernel/head_64.S:414)Dec 03 05:46:18 kernel:Allocated by task 12184:kasan_save_stack (mm/kasan/common.c:48)kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69)__kasan_slab_alloc (mm/kasan/common.c:319 mm/kasan/common.c:345)kmem_cache_alloc_noprof (mm/slub.c:4085 mm/slub.c:4134 mm/slub.c:4141)copy_net_ns (net/core/net_namespace.c:421 net/core/net_namespace.c:480)create_new_namespaces (kernel/nsproxy.c:110)unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4))ksys_unshare (kernel/fork.c:3313)__x64_sys_unshare (kernel/fork.c:3382)do_syscall_64 (arch/x86/entry/common.c:52 arch
openEuler评分：
7.8
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
受影响版本排查(受影响/不受影响)：
1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.openEuler-24.03-LTS-SP1(6.6.0):受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
1.master(6.6.0):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
1.openEuler-20.03-LTS-SP4(4.19.90):正常修复
2.openEuler-22.03-LTS-SP3(5.10.0):正常修复
3.openEuler-22.03-LTS-SP4(5.10.0):正常修复
4.openEuler-24.03-LTS(6.6.0):正常修复
5.openEuler-24.03-LTS-SP1(6.6.0):正常修复
6.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1205