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CVE-2021-47602— mac80211: track only QoS data frames for admission control

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，该漏洞源于在准入控制过程中，错误地跟踪了非QoS类型的数据帧。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1206

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 02219b3abca59fca81711bfe7ee78df7abad97ce< 69f054d6642c8f6173724ce17e7ee3ff66b8f682 affected
02219b3abca59fca81711bfe7ee78df7abad97ce< 46b9e29db2012a4d2a40a26101862e002ccf387b affected
02219b3abca59fca81711bfe7ee78df7abad97ce< eed897a22230e3231a740eddd7d6d95ba476625f affected
02219b3abca59fca81711bfe7ee78df7abad97ce< 42d08e97b196479f593499e887a9ab81446a34b9 affected
02219b3abca59fca81711bfe7ee78df7abad97ce< d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a affected
3.19 affected
< 3.19 unaffected
4.19.222≤ 4.19.* unaffected
… +4 more rows
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I. Basic Information for CVE-2021-47602

Vulnerability Information
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Vulnerability Title
mac80211: track only QoS data frames for admission control
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mac80211: track only QoS data frames for admission control For admission control, obviously all of that only works for QoS data frames, otherwise we cannot even access the QoS field in the header. Syzbot reported (see below) an uninitialized value here due to a status of a non-QoS nullfunc packet, which isn't even long enough to contain the QoS header. Fix this to only do anything for QoS data packets.
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，该漏洞源于在准入控制过程中，错误地跟踪了非QoS类型的数据帧。
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 02219b3abca59fca81711bfe7ee78df7abad97ce ~ 69f054d6642c8f6173724ce17e7ee3ff66b8f682 -
Linux Linux 3.19 -

II. Public POCs for CVE-2021-47602

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III. Intelligence Information for CVE-2021-47602

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Other References for CVE-2021-47602 (5)

Same Patch Batch · Linux · 2024-06-19 · 122 CVEs total

CVE-2024-38558 10.0 CRITICAL net: openvswitch: fix overwriting ct original tuple for ICMPv6
CVE-2024-38570 9.8 CRITICAL gfs2: Fix potential glock use-after-free on unmount
CVE-2021-47587 9.8 CRITICAL net: systemport: Add global locking for descriptor lifecycle
CVE-2024-38544 9.8 CRITICAL RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt
CVE-2021-47611 8.1 HIGH mac80211: validate extended element ID is present
CVE-2024-38587 7.8 HIGH speakup: Fix sizeof() vs ARRAY_SIZE() bug
CVE-2024-38556 7.8 HIGH net/mlx5: Add a timeout to acquire the command queue semaphore
CVE-2024-38610 7.8 HIGH drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()
CVE-2024-38605 7.8 HIGH ALSA: core: Fix NULL module pointer assignment at card init
CVE-2024-38599 7.8 HIGH jffs2: prevent xattr node from overflowing the eraseblock
CVE-2024-38592 7.8 HIGH drm/mediatek: Init `ddp_comp` with devm_kcalloc()
CVE-2024-38564 7.8 HIGH bpf: Add BPF_PROG_TYPE_CGROUP_SKB attach type enforcement in BPF_LINK_CREATE
CVE-2024-38568 7.8 HIGH drivers/perf: hisi: hns3: Fix out-of-bound access when valid event group
CVE-2024-38572 7.8 HIGH wifi: ath12k: fix out-of-bound access of qmi_invoke_handler()
CVE-2024-38578 7.8 HIGH ecryptfs: Fix buffer size for tag 66 packet
CVE-2024-38580 7.8 HIGH epoll: be better about file lifetimes
CVE-2024-38569 7.8 HIGH drivers/perf: hisi_pcie: Fix out-of-bound access when valid event group
CVE-2024-38583 7.8 HIGH nilfs2: fix use-after-free of timer for log writer thread
CVE-2024-38614 7.8 HIGH openrisc: traps: Don't send signals to kernel mode threads
CVE-2024-38588 7.8 HIGH ftrace: Fix possible use-after-free issue in ftrace_location()

Showing top 20 of 122 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47602

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