gsd - gsd-2024-26865

gsd-2024-26865

Vulnerability from gsd

Modified

2024-02-20 06:02

Details

In the Linux kernel, the following vulnerability has been resolved: rds: tcp: Fix use-after-free of net in reqsk_timer_handler(). syzkaller reported a warning of netns tracker [0] followed by KASAN splat [1] and another ref tracker warning [1]. syzkaller could not find a repro, but in the log, the only suspicious sequence was as follows: 18:26:22 executing program 1: r0 = socket$inet6_mptcp(0xa, 0x1, 0x106) ... connect$inet6(r0, &(0x7f0000000080)={0xa, 0x4001, 0x0, @loopback}, 0x1c) (async) The notable thing here is 0x4001 in connect(), which is RDS_TCP_PORT. So, the scenario would be: 1. unshare(CLONE_NEWNET) creates a per netns tcp listener in rds_tcp_listen_init(). 2. syz-executor connect()s to it and creates a reqsk. 3. syz-executor exit()s immediately. 4. netns is dismantled. [0] 5. reqsk timer is fired, and UAF happens while freeing reqsk. [1] 6. listener is freed after RCU grace period. [2] Basically, reqsk assumes that the listener guarantees netns safety until all reqsk timers are expired by holding the listener's refcount. However, this was not the case for kernel sockets. Commit 740ea3c4a0b2 ("tcp: Clean up kernel listener's reqsk in inet_twsk_purge()") fixed this issue only for per-netns ehash. Let's apply the same fix for the global ehash. [0]: ref_tracker: net notrefcnt@0000000065449cc3 has 1/1 users at sk_alloc (./include/net/net_namespace.h:337 net/core/sock.c:2146) inet6_create (net/ipv6/af_inet6.c:192 net/ipv6/af_inet6.c:119) __sock_create (net/socket.c:1572) rds_tcp_listen_init (net/rds/tcp_listen.c:279) rds_tcp_init_net (net/rds/tcp.c:577) ops_init (net/core/net_namespace.c:137) setup_net (net/core/net_namespace.c:340) copy_net_ns (net/core/net_namespace.c:497) create_new_namespaces (kernel/nsproxy.c:110) unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4)) ksys_unshare (kernel/fork.c:3429) __x64_sys_unshare (kernel/fork.c:3496) do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) ... WARNING: CPU: 0 PID: 27 at lib/ref_tracker.c:179 ref_tracker_dir_exit (lib/ref_tracker.c:179) [1]: BUG: KASAN: slab-use-after-free in inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966) Read of size 8 at addr ffff88801b370400 by task swapper/0/0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 Call Trace: <IRQ> dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1)) print_report (mm/kasan/report.c:378 mm/kasan/report.c:488) kasan_report (mm/kasan/report.c:603) inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966) reqsk_timer_handler (net/ipv4/inet_connection_sock.c:979 net/ipv4/inet_connection_sock.c:1092) call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701) __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2038) run_timer_softirq (kernel/time/timer.c:2053) __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554) irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644) sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14)) </IRQ> Allocated by task 258 on cpu 0 at 83.612050s: kasan_save_stack (mm/kasan/common.c:48) kasan_save_track (mm/kasan/common.c:68) __kasan_slab_alloc (mm/kasan/common.c:343) kmem_cache_alloc (mm/slub.c:3813 mm/slub.c:3860 mm/slub.c:3867) copy_net_ns (./include/linux/slab.h:701 net/core/net_namespace.c:421 net/core/net_namespace.c:480) create_new_namespaces (kernel/nsproxy.c:110) unshare_nsproxy_name ---truncated---

Aliases

CVE-2024-26865

JSON

To clipboard

{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-26865"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: Fix use-after-free of net in reqsk_timer_handler().\n\nsyzkaller reported a warning of netns tracker [0] followed by KASAN\nsplat [1] and another ref tracker warning [1].\n\nsyzkaller could not find a repro, but in the log, the only suspicious\nsequence was as follows:\n\n  18:26:22 executing program 1:\n  r0 = socket$inet6_mptcp(0xa, 0x1, 0x106)\n  ...\n  connect$inet6(r0, \u0026(0x7f0000000080)={0xa, 0x4001, 0x0, @loopback}, 0x1c) (async)\n\nThe notable thing here is 0x4001 in connect(), which is RDS_TCP_PORT.\n\nSo, the scenario would be:\n\n  1. unshare(CLONE_NEWNET) creates a per netns tcp listener in\n      rds_tcp_listen_init().\n  2. syz-executor connect()s to it and creates a reqsk.\n  3. syz-executor exit()s immediately.\n  4. netns is dismantled.  [0]\n  5. reqsk timer is fired, and UAF happens while freeing reqsk.  [1]\n  6. listener is freed after RCU grace period.  [2]\n\nBasically, reqsk assumes that the listener guarantees netns safety\nuntil all reqsk timers are expired by holding the listener\u0027s refcount.\nHowever, this was not the case for kernel sockets.\n\nCommit 740ea3c4a0b2 (\"tcp: Clean up kernel listener\u0027s reqsk in\ninet_twsk_purge()\") fixed this issue only for per-netns ehash.\n\nLet\u0027s apply the same fix for the global ehash.\n\n[0]:\nref_tracker: net notrefcnt@0000000065449cc3 has 1/1 users at\n     sk_alloc (./include/net/net_namespace.h:337 net/core/sock.c:2146)\n     inet6_create (net/ipv6/af_inet6.c:192 net/ipv6/af_inet6.c:119)\n     __sock_create (net/socket.c:1572)\n     rds_tcp_listen_init (net/rds/tcp_listen.c:279)\n     rds_tcp_init_net (net/rds/tcp.c:577)\n     ops_init (net/core/net_namespace.c:137)\n     setup_net (net/core/net_namespace.c:340)\n     copy_net_ns (net/core/net_namespace.c:497)\n     create_new_namespaces (kernel/nsproxy.c:110)\n     unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4))\n     ksys_unshare (kernel/fork.c:3429)\n     __x64_sys_unshare (kernel/fork.c:3496)\n     do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\n     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)\n...\nWARNING: CPU: 0 PID: 27 at lib/ref_tracker.c:179 ref_tracker_dir_exit (lib/ref_tracker.c:179)\n\n[1]:\nBUG: KASAN: slab-use-after-free in inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\nRead of size 8 at addr ffff88801b370400 by task swapper/0/0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))\n print_report (mm/kasan/report.c:378 mm/kasan/report.c:488)\n kasan_report (mm/kasan/report.c:603)\n inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\n reqsk_timer_handler (net/ipv4/inet_connection_sock.c:979 net/ipv4/inet_connection_sock.c:1092)\n call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)\n __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2038)\n run_timer_softirq (kernel/time/timer.c:2053)\n __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554)\n irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))\n \u003c/IRQ\u003e\n\nAllocated by task 258 on cpu 0 at 83.612050s:\n kasan_save_stack (mm/kasan/common.c:48)\n kasan_save_track (mm/kasan/common.c:68)\n __kasan_slab_alloc (mm/kasan/common.c:343)\n kmem_cache_alloc (mm/slub.c:3813 mm/slub.c:3860 mm/slub.c:3867)\n copy_net_ns (./include/linux/slab.h:701 net/core/net_namespace.c:421 net/core/net_namespace.c:480)\n create_new_namespaces (kernel/nsproxy.c:110)\n unshare_nsproxy_name\n---truncated---",
      "id": "GSD-2024-26865",
      "modified": "2024-02-20T06:02:29.096346Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2024-26865",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "467fa15356ac",
                          "version_value": "9905a157048f"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "4.3"
                              },
                              {
                                "lessThan": "4.3",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.1.*",
                                "status": "unaffected",
                                "version": "6.1.83",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.6.*",
                                "status": "unaffected",
                                "version": "6.6.23",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.7.*",
                                "status": "unaffected",
                                "version": "6.7.11",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "6.8.*",
                                "status": "unaffected",
                                "version": "6.8.2",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "6.9-rc1",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: Fix use-after-free of net in reqsk_timer_handler().\n\nsyzkaller reported a warning of netns tracker [0] followed by KASAN\nsplat [1] and another ref tracker warning [1].\n\nsyzkaller could not find a repro, but in the log, the only suspicious\nsequence was as follows:\n\n  18:26:22 executing program 1:\n  r0 = socket$inet6_mptcp(0xa, 0x1, 0x106)\n  ...\n  connect$inet6(r0, \u0026(0x7f0000000080)={0xa, 0x4001, 0x0, @loopback}, 0x1c) (async)\n\nThe notable thing here is 0x4001 in connect(), which is RDS_TCP_PORT.\n\nSo, the scenario would be:\n\n  1. unshare(CLONE_NEWNET) creates a per netns tcp listener in\n      rds_tcp_listen_init().\n  2. syz-executor connect()s to it and creates a reqsk.\n  3. syz-executor exit()s immediately.\n  4. netns is dismantled.  [0]\n  5. reqsk timer is fired, and UAF happens while freeing reqsk.  [1]\n  6. listener is freed after RCU grace period.  [2]\n\nBasically, reqsk assumes that the listener guarantees netns safety\nuntil all reqsk timers are expired by holding the listener\u0027s refcount.\nHowever, this was not the case for kernel sockets.\n\nCommit 740ea3c4a0b2 (\"tcp: Clean up kernel listener\u0027s reqsk in\ninet_twsk_purge()\") fixed this issue only for per-netns ehash.\n\nLet\u0027s apply the same fix for the global ehash.\n\n[0]:\nref_tracker: net notrefcnt@0000000065449cc3 has 1/1 users at\n     sk_alloc (./include/net/net_namespace.h:337 net/core/sock.c:2146)\n     inet6_create (net/ipv6/af_inet6.c:192 net/ipv6/af_inet6.c:119)\n     __sock_create (net/socket.c:1572)\n     rds_tcp_listen_init (net/rds/tcp_listen.c:279)\n     rds_tcp_init_net (net/rds/tcp.c:577)\n     ops_init (net/core/net_namespace.c:137)\n     setup_net (net/core/net_namespace.c:340)\n     copy_net_ns (net/core/net_namespace.c:497)\n     create_new_namespaces (kernel/nsproxy.c:110)\n     unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4))\n     ksys_unshare (kernel/fork.c:3429)\n     __x64_sys_unshare (kernel/fork.c:3496)\n     do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\n     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)\n...\nWARNING: CPU: 0 PID: 27 at lib/ref_tracker.c:179 ref_tracker_dir_exit (lib/ref_tracker.c:179)\n\n[1]:\nBUG: KASAN: slab-use-after-free in inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\nRead of size 8 at addr ffff88801b370400 by task swapper/0/0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))\n print_report (mm/kasan/report.c:378 mm/kasan/report.c:488)\n kasan_report (mm/kasan/report.c:603)\n inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\n reqsk_timer_handler (net/ipv4/inet_connection_sock.c:979 net/ipv4/inet_connection_sock.c:1092)\n call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)\n __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2038)\n run_timer_softirq (kernel/time/timer.c:2053)\n __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554)\n irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))\n \u003c/IRQ\u003e\n\nAllocated by task 258 on cpu 0 at 83.612050s:\n kasan_save_stack (mm/kasan/common.c:48)\n kasan_save_track (mm/kasan/common.c:68)\n __kasan_slab_alloc (mm/kasan/common.c:343)\n kmem_cache_alloc (mm/slub.c:3813 mm/slub.c:3860 mm/slub.c:3867)\n copy_net_ns (./include/linux/slab.h:701 net/core/net_namespace.c:421 net/core/net_namespace.c:480)\n create_new_namespaces (kernel/nsproxy.c:110)\n unshare_nsproxy_name\n---truncated---"
          }
        ]
      },
      "generator": {
        "engine": "bippy-d175d3acf727"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/9905a157048f441f1412e7bd13372f4a971d75c6",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/9905a157048f441f1412e7bd13372f4a971d75c6"
          },
          {
            "name": "https://git.kernel.org/stable/c/f901ee07853ce97e9f1104c7c898fbbe447f0279",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/f901ee07853ce97e9f1104c7c898fbbe447f0279"
          },
          {
            "name": "https://git.kernel.org/stable/c/9ceac040506a05a30b104b2aa2e9146810704500",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/9ceac040506a05a30b104b2aa2e9146810704500"
          },
          {
            "name": "https://git.kernel.org/stable/c/1e9fd5cf8d7f487332560f7bb312fc7d416817f3",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/1e9fd5cf8d7f487332560f7bb312fc7d416817f3"
          },
          {
            "name": "https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: Fix use-after-free of net in reqsk_timer_handler().\n\nsyzkaller reported a warning of netns tracker [0] followed by KASAN\nsplat [1] and another ref tracker warning [1].\n\nsyzkaller could not find a repro, but in the log, the only suspicious\nsequence was as follows:\n\n  18:26:22 executing program 1:\n  r0 = socket$inet6_mptcp(0xa, 0x1, 0x106)\n  ...\n  connect$inet6(r0, \u0026(0x7f0000000080)={0xa, 0x4001, 0x0, @loopback}, 0x1c) (async)\n\nThe notable thing here is 0x4001 in connect(), which is RDS_TCP_PORT.\n\nSo, the scenario would be:\n\n  1. unshare(CLONE_NEWNET) creates a per netns tcp listener in\n      rds_tcp_listen_init().\n  2. syz-executor connect()s to it and creates a reqsk.\n  3. syz-executor exit()s immediately.\n  4. netns is dismantled.  [0]\n  5. reqsk timer is fired, and UAF happens while freeing reqsk.  [1]\n  6. listener is freed after RCU grace period.  [2]\n\nBasically, reqsk assumes that the listener guarantees netns safety\nuntil all reqsk timers are expired by holding the listener\u0027s refcount.\nHowever, this was not the case for kernel sockets.\n\nCommit 740ea3c4a0b2 (\"tcp: Clean up kernel listener\u0027s reqsk in\ninet_twsk_purge()\") fixed this issue only for per-netns ehash.\n\nLet\u0027s apply the same fix for the global ehash.\n\n[0]:\nref_tracker: net notrefcnt@0000000065449cc3 has 1/1 users at\n     sk_alloc (./include/net/net_namespace.h:337 net/core/sock.c:2146)\n     inet6_create (net/ipv6/af_inet6.c:192 net/ipv6/af_inet6.c:119)\n     __sock_create (net/socket.c:1572)\n     rds_tcp_listen_init (net/rds/tcp_listen.c:279)\n     rds_tcp_init_net (net/rds/tcp.c:577)\n     ops_init (net/core/net_namespace.c:137)\n     setup_net (net/core/net_namespace.c:340)\n     copy_net_ns (net/core/net_namespace.c:497)\n     create_new_namespaces (kernel/nsproxy.c:110)\n     unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4))\n     ksys_unshare (kernel/fork.c:3429)\n     __x64_sys_unshare (kernel/fork.c:3496)\n     do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\n     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)\n...\nWARNING: CPU: 0 PID: 27 at lib/ref_tracker.c:179 ref_tracker_dir_exit (lib/ref_tracker.c:179)\n\n[1]:\nBUG: KASAN: slab-use-after-free in inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\nRead of size 8 at addr ffff88801b370400 by task swapper/0/0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))\n print_report (mm/kasan/report.c:378 mm/kasan/report.c:488)\n kasan_report (mm/kasan/report.c:603)\n inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\n reqsk_timer_handler (net/ipv4/inet_connection_sock.c:979 net/ipv4/inet_connection_sock.c:1092)\n call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)\n __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2038)\n run_timer_softirq (kernel/time/timer.c:2053)\n __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554)\n irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))\n \u003c/IRQ\u003e\n\nAllocated by task 258 on cpu 0 at 83.612050s:\n kasan_save_stack (mm/kasan/common.c:48)\n kasan_save_track (mm/kasan/common.c:68)\n __kasan_slab_alloc (mm/kasan/common.c:343)\n kmem_cache_alloc (mm/slub.c:3813 mm/slub.c:3860 mm/slub.c:3867)\n copy_net_ns (./include/linux/slab.h:701 net/core/net_namespace.c:421 net/core/net_namespace.c:480)\n create_new_namespaces (kernel/nsproxy.c:110)\n unshare_nsproxy_name\n---truncated---"
          }
        ],
        "id": "CVE-2024-26865",
        "lastModified": "2024-04-17T12:48:07.510",
        "metrics": {},
        "published": "2024-04-17T11:15:09.207",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1e9fd5cf8d7f487332560f7bb312fc7d416817f3"
          },
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            "url": "https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24"
          },
          {
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            "url": "https://git.kernel.org/stable/c/9905a157048f441f1412e7bd13372f4a971d75c6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9ceac040506a05a30b104b2aa2e9146810704500"
          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f901ee07853ce97e9f1104c7c898fbbe447f0279"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}

cve-2024-26865

Vulnerability from cvelistv5

Published

2024-04-17 10:27

Modified

2024-12-19 08:48

Severity ?

Summary

References

▼	URL	Tags
	https://git.kernel.org/stable/c/9905a157048f441f1412e7bd13372f4a971d75c6
	https://git.kernel.org/stable/c/f901ee07853ce97e9f1104c7c898fbbe447f0279
	https://git.kernel.org/stable/c/9ceac040506a05a30b104b2aa2e9146810704500
	https://git.kernel.org/stable/c/1e9fd5cf8d7f487332560f7bb312fc7d416817f3
	https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24

Impacted products

Vendor

Product

Version

▼

Linux

Version: 467fa15356acfb7b2efa38839c3e76caa4e6e0ea
Version: 467fa15356acfb7b2efa38839c3e76caa4e6e0ea
Version: 467fa15356acfb7b2efa38839c3e76caa4e6e0ea
Version: 467fa15356acfb7b2efa38839c3e76caa4e6e0ea
Version: 467fa15356acfb7b2efa38839c3e76caa4e6e0ea

Linux

Version: 4.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26865",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-17T19:18:52.275032Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-17T19:19:00.459Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:04.158Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/f901ee07853ce97e9f1104c7c898fbbe447f0279"
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            "url": "https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24"
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        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/tcp_minisocks.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "4.3"
            },
            {
              "lessThan": "4.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.23",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.7.11",
              "versionType": "semver"
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              "version": "6.8.2",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.9",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: tcp: Fix use-after-free of net in reqsk_timer_handler().\n\nsyzkaller reported a warning of netns tracker [0] followed by KASAN\nsplat [1] and another ref tracker warning [1].\n\nsyzkaller could not find a repro, but in the log, the only suspicious\nsequence was as follows:\n\n  18:26:22 executing program 1:\n  r0 = socket$inet6_mptcp(0xa, 0x1, 0x106)\n  ...\n  connect$inet6(r0, \u0026(0x7f0000000080)={0xa, 0x4001, 0x0, @loopback}, 0x1c) (async)\n\nThe notable thing here is 0x4001 in connect(), which is RDS_TCP_PORT.\n\nSo, the scenario would be:\n\n  1. unshare(CLONE_NEWNET) creates a per netns tcp listener in\n      rds_tcp_listen_init().\n  2. syz-executor connect()s to it and creates a reqsk.\n  3. syz-executor exit()s immediately.\n  4. netns is dismantled.  [0]\n  5. reqsk timer is fired, and UAF happens while freeing reqsk.  [1]\n  6. listener is freed after RCU grace period.  [2]\n\nBasically, reqsk assumes that the listener guarantees netns safety\nuntil all reqsk timers are expired by holding the listener\u0027s refcount.\nHowever, this was not the case for kernel sockets.\n\nCommit 740ea3c4a0b2 (\"tcp: Clean up kernel listener\u0027s reqsk in\ninet_twsk_purge()\") fixed this issue only for per-netns ehash.\n\nLet\u0027s apply the same fix for the global ehash.\n\n[0]:\nref_tracker: net notrefcnt@0000000065449cc3 has 1/1 users at\n     sk_alloc (./include/net/net_namespace.h:337 net/core/sock.c:2146)\n     inet6_create (net/ipv6/af_inet6.c:192 net/ipv6/af_inet6.c:119)\n     __sock_create (net/socket.c:1572)\n     rds_tcp_listen_init (net/rds/tcp_listen.c:279)\n     rds_tcp_init_net (net/rds/tcp.c:577)\n     ops_init (net/core/net_namespace.c:137)\n     setup_net (net/core/net_namespace.c:340)\n     copy_net_ns (net/core/net_namespace.c:497)\n     create_new_namespaces (kernel/nsproxy.c:110)\n     unshare_nsproxy_namespaces (kernel/nsproxy.c:228 (discriminator 4))\n     ksys_unshare (kernel/fork.c:3429)\n     __x64_sys_unshare (kernel/fork.c:3496)\n     do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)\n     entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)\n...\nWARNING: CPU: 0 PID: 27 at lib/ref_tracker.c:179 ref_tracker_dir_exit (lib/ref_tracker.c:179)\n\n[1]:\nBUG: KASAN: slab-use-after-free in inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\nRead of size 8 at addr ffff88801b370400 by task swapper/0/0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cIRQ\u003e\n dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))\n print_report (mm/kasan/report.c:378 mm/kasan/report.c:488)\n kasan_report (mm/kasan/report.c:603)\n inet_csk_reqsk_queue_drop (./include/net/inet_hashtables.h:180 net/ipv4/inet_connection_sock.c:952 net/ipv4/inet_connection_sock.c:966)\n reqsk_timer_handler (net/ipv4/inet_connection_sock.c:979 net/ipv4/inet_connection_sock.c:1092)\n call_timer_fn (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/timer.h:127 kernel/time/timer.c:1701)\n __run_timers.part.0 (kernel/time/timer.c:1752 kernel/time/timer.c:2038)\n run_timer_softirq (kernel/time/timer.c:2053)\n __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:554)\n irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)\n sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))\n \u003c/IRQ\u003e\n\nAllocated by task 258 on cpu 0 at 83.612050s:\n kasan_save_stack (mm/kasan/common.c:48)\n kasan_save_track (mm/kasan/common.c:68)\n __kasan_slab_alloc (mm/kasan/common.c:343)\n kmem_cache_alloc (mm/slub.c:3813 mm/slub.c:3860 mm/slub.c:3867)\n copy_net_ns (./include/linux/slab.h:701 net/core/net_namespace.c:421 net/core/net_namespace.c:480)\n create_new_namespaces (kernel/nsproxy.c:110)\n unshare_nsproxy_name\n---truncated---"
        }
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/2a750d6a5b365265dbda33330a6188547ddb5c24"
        }
      ],
      "title": "rds: tcp: Fix use-after-free of net in reqsk_timer_handler().",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26865",
    "datePublished": "2024-04-17T10:27:27.522Z",
    "dateReserved": "2024-02-19T14:20:24.184Z",
    "dateUpdated": "2024-12-19T08:48:59.053Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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