CVE-2024-50126 (GCVE-0-2024-50126)

Vulnerability from cvelistv5 – Published: 2024-11-05 17:10 – Updated: 2025-11-03 22:25
VLAI?
Title
net: sched: use RCU read-side critical section in taprio_dump()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sched: use RCU read-side critical section in taprio_dump() Fix possible use-after-free in 'taprio_dump()' by adding RCU read-side critical section there. Never seen on x86 but found on a KASAN-enabled arm64 system when investigating https://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa: [T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0 [T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862 [T15862] [T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2 [T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024 [T15862] Call trace: [T15862] dump_backtrace+0x20c/0x220 [T15862] show_stack+0x2c/0x40 [T15862] dump_stack_lvl+0xf8/0x174 [T15862] print_report+0x170/0x4d8 [T15862] kasan_report+0xb8/0x1d4 [T15862] __asan_report_load4_noabort+0x20/0x2c [T15862] taprio_dump+0xa0c/0xbb0 [T15862] tc_fill_qdisc+0x540/0x1020 [T15862] qdisc_notify.isra.0+0x330/0x3a0 [T15862] tc_modify_qdisc+0x7b8/0x1838 [T15862] rtnetlink_rcv_msg+0x3c8/0xc20 [T15862] netlink_rcv_skb+0x1f8/0x3d4 [T15862] rtnetlink_rcv+0x28/0x40 [T15862] netlink_unicast+0x51c/0x790 [T15862] netlink_sendmsg+0x79c/0xc20 [T15862] __sock_sendmsg+0xe0/0x1a0 [T15862] ____sys_sendmsg+0x6c0/0x840 [T15862] ___sys_sendmsg+0x1ac/0x1f0 [T15862] __sys_sendmsg+0x110/0x1d0 [T15862] __arm64_sys_sendmsg+0x74/0xb0 [T15862] invoke_syscall+0x88/0x2e0 [T15862] el0_svc_common.constprop.0+0xe4/0x2a0 [T15862] do_el0_svc+0x44/0x60 [T15862] el0_svc+0x50/0x184 [T15862] el0t_64_sync_handler+0x120/0x12c [T15862] el0t_64_sync+0x190/0x194 [T15862] [T15862] Allocated by task 15857: [T15862] kasan_save_stack+0x3c/0x70 [T15862] kasan_save_track+0x20/0x3c [T15862] kasan_save_alloc_info+0x40/0x60 [T15862] __kasan_kmalloc+0xd4/0xe0 [T15862] __kmalloc_cache_noprof+0x194/0x334 [T15862] taprio_change+0x45c/0x2fe0 [T15862] tc_modify_qdisc+0x6a8/0x1838 [T15862] rtnetlink_rcv_msg+0x3c8/0xc20 [T15862] netlink_rcv_skb+0x1f8/0x3d4 [T15862] rtnetlink_rcv+0x28/0x40 [T15862] netlink_unicast+0x51c/0x790 [T15862] netlink_sendmsg+0x79c/0xc20 [T15862] __sock_sendmsg+0xe0/0x1a0 [T15862] ____sys_sendmsg+0x6c0/0x840 [T15862] ___sys_sendmsg+0x1ac/0x1f0 [T15862] __sys_sendmsg+0x110/0x1d0 [T15862] __arm64_sys_sendmsg+0x74/0xb0 [T15862] invoke_syscall+0x88/0x2e0 [T15862] el0_svc_common.constprop.0+0xe4/0x2a0 [T15862] do_el0_svc+0x44/0x60 [T15862] el0_svc+0x50/0x184 [T15862] el0t_64_sync_handler+0x120/0x12c [T15862] el0t_64_sync+0x190/0x194 [T15862] [T15862] Freed by task 6192: [T15862] kasan_save_stack+0x3c/0x70 [T15862] kasan_save_track+0x20/0x3c [T15862] kasan_save_free_info+0x4c/0x80 [T15862] poison_slab_object+0x110/0x160 [T15862] __kasan_slab_free+0x3c/0x74 [T15862] kfree+0x134/0x3c0 [T15862] taprio_free_sched_cb+0x18c/0x220 [T15862] rcu_core+0x920/0x1b7c [T15862] rcu_core_si+0x10/0x1c [T15862] handle_softirqs+0x2e8/0xd64 [T15862] __do_softirq+0x14/0x20
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 , < b911fa9e92ee586e36479ad57b88f20471acaca1 (git)
Affected: 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 , < 5d282467245f267c0b9ada3f7f309ff838521536 (git)
Affected: 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 , < e4369cb6acf6b895ac2453cc1cdf2f4326122c6d (git)
Affected: 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 , < b22db8b8befe90b61c98626ca1a2fbb0505e9fe3 (git)
Create a notification for this product.
    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.117 , ≤ 6.1.* (semver)
Unaffected: 6.6.59 , ≤ 6.6.* (semver)
Unaffected: 6.11.6 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: use RCU read-side critical section in taprio_dump()\n\nFix possible use-after-free in \u0027taprio_dump()\u0027 by adding RCU\nread-side critical section there. Never seen on x86 but\nfound on a KASAN-enabled arm64 system when investigating\nhttps://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:\n\n[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0\n[T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862\n[T15862]\n[T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2\n[T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024\n[T15862] Call trace:\n[T15862]  dump_backtrace+0x20c/0x220\n[T15862]  show_stack+0x2c/0x40\n[T15862]  dump_stack_lvl+0xf8/0x174\n[T15862]  print_report+0x170/0x4d8\n[T15862]  kasan_report+0xb8/0x1d4\n[T15862]  __asan_report_load4_noabort+0x20/0x2c\n[T15862]  taprio_dump+0xa0c/0xbb0\n[T15862]  tc_fill_qdisc+0x540/0x1020\n[T15862]  qdisc_notify.isra.0+0x330/0x3a0\n[T15862]  tc_modify_qdisc+0x7b8/0x1838\n[T15862]  rtnetlink_rcv_msg+0x3c8/0xc20\n[T15862]  netlink_rcv_skb+0x1f8/0x3d4\n[T15862]  rtnetlink_rcv+0x28/0x40\n[T15862]  netlink_unicast+0x51c/0x790\n[T15862]  netlink_sendmsg+0x79c/0xc20\n[T15862]  __sock_sendmsg+0xe0/0x1a0\n[T15862]  ____sys_sendmsg+0x6c0/0x840\n[T15862]  ___sys_sendmsg+0x1ac/0x1f0\n[T15862]  __sys_sendmsg+0x110/0x1d0\n[T15862]  __arm64_sys_sendmsg+0x74/0xb0\n[T15862]  invoke_syscall+0x88/0x2e0\n[T15862]  el0_svc_common.constprop.0+0xe4/0x2a0\n[T15862]  do_el0_svc+0x44/0x60\n[T15862]  el0_svc+0x50/0x184\n[T15862]  el0t_64_sync_handler+0x120/0x12c\n[T15862]  el0t_64_sync+0x190/0x194\n[T15862]\n[T15862] Allocated by task 15857:\n[T15862]  kasan_save_stack+0x3c/0x70\n[T15862]  kasan_save_track+0x20/0x3c\n[T15862]  kasan_save_alloc_info+0x40/0x60\n[T15862]  __kasan_kmalloc+0xd4/0xe0\n[T15862]  __kmalloc_cache_noprof+0x194/0x334\n[T15862]  taprio_change+0x45c/0x2fe0\n[T15862]  tc_modify_qdisc+0x6a8/0x1838\n[T15862]  rtnetlink_rcv_msg+0x3c8/0xc20\n[T15862]  netlink_rcv_skb+0x1f8/0x3d4\n[T15862]  rtnetlink_rcv+0x28/0x40\n[T15862]  netlink_unicast+0x51c/0x790\n[T15862]  netlink_sendmsg+0x79c/0xc20\n[T15862]  __sock_sendmsg+0xe0/0x1a0\n[T15862]  ____sys_sendmsg+0x6c0/0x840\n[T15862]  ___sys_sendmsg+0x1ac/0x1f0\n[T15862]  __sys_sendmsg+0x110/0x1d0\n[T15862]  __arm64_sys_sendmsg+0x74/0xb0\n[T15862]  invoke_syscall+0x88/0x2e0\n[T15862]  el0_svc_common.constprop.0+0xe4/0x2a0\n[T15862]  do_el0_svc+0x44/0x60\n[T15862]  el0_svc+0x50/0x184\n[T15862]  el0t_64_sync_handler+0x120/0x12c\n[T15862]  el0t_64_sync+0x190/0x194\n[T15862]\n[T15862] Freed by task 6192:\n[T15862]  kasan_save_stack+0x3c/0x70\n[T15862]  kasan_save_track+0x20/0x3c\n[T15862]  kasan_save_free_info+0x4c/0x80\n[T15862]  poison_slab_object+0x110/0x160\n[T15862]  __kasan_slab_free+0x3c/0x74\n[T15862]  kfree+0x134/0x3c0\n[T15862]  taprio_free_sched_cb+0x18c/0x220\n[T15862]  rcu_core+0x920/0x1b7c\n[T15862]  rcu_core_si+0x10/0x1c\n[T15862]  handle_softirqs+0x2e8/0xd64\n[T15862]  __do_softirq+0x14/0x20"
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:46:38.705Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/b911fa9e92ee586e36479ad57b88f20471acaca1"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50126",
    "datePublished": "2024-11-05T17:10:53.741Z",
    "dateReserved": "2024-10-21T19:36:19.954Z",
    "dateUpdated": "2025-11-03T22:25:47.069Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:25:47.069Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50126\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-12-11T14:28:25.069183Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-12-11T14:28:26.361Z\"}}], \"cna\": {\"title\": \"net: sched: use RCU read-side critical section in taprio_dump()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"18cdd2f0998a4967b1fff4c43ed9aef049e42c39\", \"lessThan\": \"b911fa9e92ee586e36479ad57b88f20471acaca1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"18cdd2f0998a4967b1fff4c43ed9aef049e42c39\", \"lessThan\": \"5d282467245f267c0b9ada3f7f309ff838521536\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"18cdd2f0998a4967b1fff4c43ed9aef049e42c39\", \"lessThan\": \"e4369cb6acf6b895ac2453cc1cdf2f4326122c6d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"18cdd2f0998a4967b1fff4c43ed9aef049e42c39\", \"lessThan\": \"b22db8b8befe90b61c98626ca1a2fbb0505e9fe3\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/sch_taprio.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.117\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.59\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/sch_taprio.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b911fa9e92ee586e36479ad57b88f20471acaca1\"}, {\"url\": \"https://git.kernel.org/stable/c/5d282467245f267c0b9ada3f7f309ff838521536\"}, {\"url\": \"https://git.kernel.org/stable/c/e4369cb6acf6b895ac2453cc1cdf2f4326122c6d\"}, {\"url\": \"https://git.kernel.org/stable/c/b22db8b8befe90b61c98626ca1a2fbb0505e9fe3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: use RCU read-side critical section in taprio_dump()\\n\\nFix possible use-after-free in \u0027taprio_dump()\u0027 by adding RCU\\nread-side critical section there. Never seen on x86 but\\nfound on a KASAN-enabled arm64 system when investigating\\nhttps://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:\\n\\n[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0\\n[T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862\\n[T15862]\\n[T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2\\n[T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024\\n[T15862] Call trace:\\n[T15862]  dump_backtrace+0x20c/0x220\\n[T15862]  show_stack+0x2c/0x40\\n[T15862]  dump_stack_lvl+0xf8/0x174\\n[T15862]  print_report+0x170/0x4d8\\n[T15862]  kasan_report+0xb8/0x1d4\\n[T15862]  __asan_report_load4_noabort+0x20/0x2c\\n[T15862]  taprio_dump+0xa0c/0xbb0\\n[T15862]  tc_fill_qdisc+0x540/0x1020\\n[T15862]  qdisc_notify.isra.0+0x330/0x3a0\\n[T15862]  tc_modify_qdisc+0x7b8/0x1838\\n[T15862]  rtnetlink_rcv_msg+0x3c8/0xc20\\n[T15862]  netlink_rcv_skb+0x1f8/0x3d4\\n[T15862]  rtnetlink_rcv+0x28/0x40\\n[T15862]  netlink_unicast+0x51c/0x790\\n[T15862]  netlink_sendmsg+0x79c/0xc20\\n[T15862]  __sock_sendmsg+0xe0/0x1a0\\n[T15862]  ____sys_sendmsg+0x6c0/0x840\\n[T15862]  ___sys_sendmsg+0x1ac/0x1f0\\n[T15862]  __sys_sendmsg+0x110/0x1d0\\n[T15862]  __arm64_sys_sendmsg+0x74/0xb0\\n[T15862]  invoke_syscall+0x88/0x2e0\\n[T15862]  el0_svc_common.constprop.0+0xe4/0x2a0\\n[T15862]  do_el0_svc+0x44/0x60\\n[T15862]  el0_svc+0x50/0x184\\n[T15862]  el0t_64_sync_handler+0x120/0x12c\\n[T15862]  el0t_64_sync+0x190/0x194\\n[T15862]\\n[T15862] Allocated by task 15857:\\n[T15862]  kasan_save_stack+0x3c/0x70\\n[T15862]  kasan_save_track+0x20/0x3c\\n[T15862]  kasan_save_alloc_info+0x40/0x60\\n[T15862]  __kasan_kmalloc+0xd4/0xe0\\n[T15862]  __kmalloc_cache_noprof+0x194/0x334\\n[T15862]  taprio_change+0x45c/0x2fe0\\n[T15862]  tc_modify_qdisc+0x6a8/0x1838\\n[T15862]  rtnetlink_rcv_msg+0x3c8/0xc20\\n[T15862]  netlink_rcv_skb+0x1f8/0x3d4\\n[T15862]  rtnetlink_rcv+0x28/0x40\\n[T15862]  netlink_unicast+0x51c/0x790\\n[T15862]  netlink_sendmsg+0x79c/0xc20\\n[T15862]  __sock_sendmsg+0xe0/0x1a0\\n[T15862]  ____sys_sendmsg+0x6c0/0x840\\n[T15862]  ___sys_sendmsg+0x1ac/0x1f0\\n[T15862]  __sys_sendmsg+0x110/0x1d0\\n[T15862]  __arm64_sys_sendmsg+0x74/0xb0\\n[T15862]  invoke_syscall+0x88/0x2e0\\n[T15862]  el0_svc_common.constprop.0+0xe4/0x2a0\\n[T15862]  do_el0_svc+0x44/0x60\\n[T15862]  el0_svc+0x50/0x184\\n[T15862]  el0t_64_sync_handler+0x120/0x12c\\n[T15862]  el0t_64_sync+0x190/0x194\\n[T15862]\\n[T15862] Freed by task 6192:\\n[T15862]  kasan_save_stack+0x3c/0x70\\n[T15862]  kasan_save_track+0x20/0x3c\\n[T15862]  kasan_save_free_info+0x4c/0x80\\n[T15862]  poison_slab_object+0x110/0x160\\n[T15862]  __kasan_slab_free+0x3c/0x74\\n[T15862]  kfree+0x134/0x3c0\\n[T15862]  taprio_free_sched_cb+0x18c/0x220\\n[T15862]  rcu_core+0x920/0x1b7c\\n[T15862]  rcu_core_si+0x10/0x1c\\n[T15862]  handle_softirqs+0x2e8/0xd64\\n[T15862]  __do_softirq+0x14/0x20\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.117\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.59\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.6\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"6.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:46:38.705Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50126\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:25:47.069Z\", \"dateReserved\": \"2024-10-21T19:36:19.954Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-05T17:10:53.741Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.