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CVE-2024-50127— net: sched: fix use-after-free in taprio_change()

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net: sched模块在taprio_change函数中未能正确处理admin指针，可能导致释放后重用问题。

CVSS 7.8 · High EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1564 · Hide Artifacts

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux a3d43c0d56f1b94e74963a2fbadfb70126d92213< 2f868ce6013548a713c431c679ef73747a66fcf3 affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< 8a283a19026aaae8a773fd8061263cfa315b127f affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< 999612996df28d81f163dad530d7f8026e03aec6 affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< fe371f084073e8672a2d7d46b335c3c060d1e301 affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< 0d4c0d2844e4eac3aed647f948fd7e60eea56a61 affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< 2240f9376f20f8b6463232b4ca7292569217237f affected
a3d43c0d56f1b94e74963a2fbadfb70126d92213< f504465970aebb2467da548f7c1efbbf36d0f44b affected
5.2 affected
… +8 more rows
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I. Basic Information for CVE-2024-50127

Vulnerability Information
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Vulnerability Title
net: sched: fix use-after-free in taprio_change()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix use-after-free in taprio_change() In 'taprio_change()', 'admin' pointer may become dangling due to sched switch / removal caused by 'advance_sched()', and critical section protected by 'q->current_entry_lock' is too small to prevent from such a scenario (which causes use-after-free detected by KASAN). Fix this by prefer 'rcu_replace_pointer()' over 'rcu_assign_pointer()' to update 'admin' immediately before an attempt to schedule freeing.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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net: sched模块在taprio_change函数中未能正确处理admin指针，可能导致释放后重用问题。
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 a3d43c0d56f1b94e74963a2fbadfb70126d92213 ~ 2f868ce6013548a713c431c679ef73747a66fcf3 -
Linux Linux 5.2 -

II. Public POCs for CVE-2024-50127

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III. Intelligence Information for CVE-2024-50127

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Patches & Fixes for CVE-2024-50127 (5)

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-2024-50126 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-2024-50099 7.3 HIGH arm64: probes: Remove broken LDR (literal) uprobe support
CVE-2024-50096 7.3 HIGH nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error
CVE-2024-50131 7.3 HIGH tracing: Consider the NULL character when validating the event length
CVE-2024-50117 7.3 HIGH drm/amd: Guard against bad data for ATIF ACPI method

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50127

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