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CVE-2024-50133— LoongArch: Don't crash in stack_top() for tasks without vDSO

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于LoongArch架构中，任务可能在没有vDSO映射的情况下调用stack_top函数，从而引发空指针取消引用，导致系统崩溃。

AI Predicted 5.5 Difficulty: Trivial EPSS 0.22% · P13

Possible ATT&CK Techniques 1 AI

T1498.003

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 803b0fc5c3f2baa6e54978cd576407896f789b08< a67d4a02bf43e15544179895ede7d5f97b84b550 affected
803b0fc5c3f2baa6e54978cd576407896f789b08< a94c197d4d749954dfaa37e907fcc8c04e4aad7e affected
803b0fc5c3f2baa6e54978cd576407896f789b08< 041cc3860b06770357876d1114d615333b0fbf31 affected
803b0fc5c3f2baa6e54978cd576407896f789b08< 134475a9ab8487527238d270639a8cb74c10aab2 affected
5.19 affected
< 5.19 unaffected
6.1.115≤ 6.1.* unaffected
6.6.59≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-50133

Vulnerability Information
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Vulnerability Title
LoongArch: Don't crash in stack_top() for tasks without vDSO
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: LoongArch: Don't crash in stack_top() for tasks without vDSO Not all tasks have a vDSO mapped, for example kthreads never do. If such a task ever ends up calling stack_top(), it will derefence the NULL vdso pointer and crash. This can for example happen when using kunit: [<9000000000203874>] stack_top+0x58/0xa8 [<90000000002956cc>] arch_pick_mmap_layout+0x164/0x220 [<90000000003c284c>] kunit_vm_mmap_init+0x108/0x12c [<90000000003c1fbc>] __kunit_add_resource+0x38/0x8c [<90000000003c2704>] kunit_vm_mmap+0x88/0xc8 [<9000000000410b14>] usercopy_test_init+0xbc/0x25c [<90000000003c1db4>] kunit_try_run_case+0x5c/0x184 [<90000000003c3d54>] kunit_generic_run_threadfn_adapter+0x24/0x48 [<900000000022e4bc>] kthread+0xc8/0xd4 [<9000000000200ce8>] ret_from_kernel_thread+0xc/0xa4
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于LoongArch架构中，任务可能在没有vDSO映射的情况下调用stack_top函数，从而引发空指针取消引用，导致系统崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 803b0fc5c3f2baa6e54978cd576407896f789b08 ~ a67d4a02bf43e15544179895ede7d5f97b84b550 -
Linux Linux 5.19 -

II. Public POCs for CVE-2024-50133

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III. Intelligence Information for CVE-2024-50133

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Patches & Fixes for CVE-2024-50133 (3)

Same Patch Batch · Linux · 2024-11-05 · 50 CVEs total

CVE-2024-50106 9.8 CRITICAL nfsd: fix race between laundromat and free_stateid
CVE-2024-50113 8.8 HIGH firewire: core: fix invalid port index for parent device
CVE-2024-50115 8.4 HIGH KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory
CVE-2024-50125 8.0 HIGH Bluetooth: SCO: Fix UAF on sco_sock_timeout
CVE-2024-50124 8.0 HIGH Bluetooth: ISO: Fix UAF on iso_sock_timeout
CVE-2024-50132 7.8 HIGH tracing/probes: Fix MAX_TRACE_ARGS limit handling
CVE-2023-52920 7.8 HIGH bpf: support non-r10 register spill/fill to/from stack in precision tracking
CVE-2024-50091 7.8 HIGH dm vdo: don't refer to dedupe_context after releasing it
CVE-2024-50101 7.8 HIGH iommu/vt-d: Fix incorrect pci_for_each_dma_alias() for non-PCI devices
CVE-2024-50114 7.8 HIGH KVM: arm64: Unregister redistributor for failed vCPU creation
CVE-2024-50127 7.8 HIGH net: sched: fix use-after-free in taprio_change()
CVE-2024-50126 7.8 HIGH net: sched: use RCU read-side critical section in taprio_dump()
CVE-2024-50128 7.8 HIGH net: wwan: fix global oob in wwan_rtnl_policy
CVE-2024-50130 7.8 HIGH netfilter: bpf: must hold reference on net namespace
CVE-2024-50090 7.8 HIGH drm/xe/oa: Fix overflow in oa batch buffer
CVE-2024-50094 7.5 HIGH sfc: Don't invoke xdp_do_flush() from netpoll.
CVE-2024-50095 7.5 HIGH RDMA/mad: Improve handling of timed out WRs of mad agent
CVE-2024-50096 7.3 HIGH nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error
CVE-2024-50099 7.3 HIGH arm64: probes: Remove broken LDR (literal) uprobe support
CVE-2024-50131 7.3 HIGH tracing: Consider the NULL character when validating the event length

Showing top 20 of 50 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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