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CVE-2021-47336— smackfs: restrict bytes count in smk_set_cipso()

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，该漏洞源于没有限制 smk_set_cipso函数中的字节数。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 5f9880403e6b71d56924748ba331daf836243fca affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 5c2dca9a7a7ff6a2df34158903515e2e4fd3d2b2 affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< cbd87ba6a13891acf6180783f8234a8b7a3e3d4d affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 135122f174c357b7a3e58f40fa5792156c5e93e6 affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 3780348c1a0e14ffefcaf1fc521f815bcaac94b0 affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 8f5c773a2871cf446e3f36b2834fb25bbb28512b affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 258fd821f69378453c071b9dd767b298810fc766 affected
f7112e6c9abf1c70f001dcf097c1d6e218a93f5c< 49ec114a6e62d8d320037ce71c1aaf9650b3cafd affected
… +10 more rows
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I. Basic Information for CVE-2021-47336

Vulnerability Information
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Vulnerability Title
smackfs: restrict bytes count in smk_set_cipso()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smackfs: restrict bytes count in smk_set_cipso() Oops, I failed to update subject line. From 07571157c91b98ce1a4aa70967531e64b78e8346 Mon Sep 17 00:00:00 2001 Date: Mon, 12 Apr 2021 22:25:06 +0900 Subject: [PATCH] smackfs: restrict bytes count in smk_set_cipso() Commit 7ef4c19d245f3dc2 ("smackfs: restrict bytes count in smackfs write functions") missed that count > SMK_CIPSOMAX check applies to only format == SMK_FIXED24_FMT case.
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，该漏洞源于没有限制 smk_set_cipso函数中的字节数。
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 f7112e6c9abf1c70f001dcf097c1d6e218a93f5c ~ 5f9880403e6b71d56924748ba331daf836243fca -
Linux Linux 3.5 -

II. Public POCs for CVE-2021-47336

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III. Intelligence Information for CVE-2021-47336

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Other References for CVE-2021-47336 (7)

Same Patch Batch · Linux · 2024-05-21 · 361 CVEs total

CVE-2023-52732 9.8 CRITICAL ceph: blocklist the kclient when receiving corrupted snap trace
CVE-2023-52755 9.8 CRITICAL ksmbd: fix slab out of bounds write in smb_inherit_dacl()
CVE-2021-47328 9.8 CRITICAL scsi: iscsi: Fix conn use after free during resets
CVE-2023-52741 9.8 CRITICAL cifs: Fix use-after-free in rdata->read_into_pages()
CVE-2021-47378 9.8 CRITICAL nvme-rdma: destroy cm id before destroy qp to avoid use after free
CVE-2021-47232 9.8 CRITICAL can: j1939: fix Use-after-Free, hold skb ref while in use
CVE-2021-47427 9.8 CRITICAL scsi: iscsi: Fix iscsi_task use after free
CVE-2023-52846 8.8 HIGH hsr: Prevent use after free in prp_create_tagged_frame()
CVE-2023-52801 8.8 HIGH iommufd: Fix missing update of domains_itree after splitting iopt_area
CVE-2023-52798 8.8 HIGH wifi: ath11k: fix dfs radar event locking
CVE-2021-47388 8.8 HIGH mac80211: fix use-after-free in CCMP/GCMP RX
CVE-2021-47390 8.8 HIGH KVM: x86: Fix stack-out-of-bounds memory access from ioapic_write_indirect()
CVE-2023-52790 8.8 HIGH swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC
CVE-2023-52769 8.8 HIGH wifi: ath12k: fix htt mlo-offset event locking
CVE-2023-52776 8.8 HIGH wifi: ath12k: fix dfs-radar and temperature event locking
CVE-2021-47308 8.8 HIGH scsi: libfc: Fix array index out of bound exception
CVE-2023-52829 8.4 HIGH wifi: ath12k: fix possible out-of-bound write in ath12k_wmi_ext_hal_reg_caps()
CVE-2021-47240 8.4 HIGH net: qrtr: fix OOB Read in qrtr_endpoint_post
CVE-2021-47352 8.4 HIGH virtio-net: Add validation for used length
CVE-2021-47244 8.2 HIGH mptcp: Fix out of bounds when parsing TCP options

Showing top 20 of 361 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47336

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