Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2021-47066— async_xor: increase src_offs when dropping destination page

EPSS 0.02% · P5
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2021-47066

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
async_xor: increase src_offs when dropping destination page
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: async_xor: increase src_offs when dropping destination page Now we support sharing one page if PAGE_SIZE is not equal stripe size. To support this, it needs to support calculating xor value with different offsets for each r5dev. One offset array is used to record those offsets. In RMW mode, parity page is used as a source page. It sets ASYNC_TX_XOR_DROP_DST before calculating xor value in ops_run_prexor5. So it needs to add src_list and src_offs at the same time. Now it only needs src_list. So the xor value which is calculated is wrong. It can cause data corruption problem. I can reproduce this problem 100% on a POWER8 machine. The steps are: mdadm -CR /dev/md0 -l5 -n3 /dev/sdb1 /dev/sdc1 /dev/sdd1 --size=3G mkfs.xfs /dev/md0 mount /dev/md0 /mnt/test mount: /mnt/test: mount(2) system call failed: Structure needs cleaning.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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。攻击者利用该漏洞导致数据损坏。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 29bcff787a2593b2126cfaff612c0b4e560022e9 ~ cab2e8e5997b592fdb7d02cf2387b4b8e3057174 -
LinuxLinux 5.10 -

II. Public POCs for CVE-2021-47066

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-47066

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total

CVE-2021-47016m68k: mvme147,mvme16x: Don't wipe PCC timer config bits
CVE-2021-47068net/nfc: fix use-after-free llcp_sock_bind/connect
CVE-2021-47067soc/tegra: regulators: Fix locking up when voltage-spread is out of range
CVE-2021-47061KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2021-47064mt76: fix potential DMA mapping leak
CVE-2021-47063drm: bridge/panel: Cleanup connector on bridge detach
CVE-2021-47062KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs
CVE-2021-47065rtw88: Fix array overrun in rtw_get_tx_power_params()
CVE-2021-47054bus: qcom: Put child node before return
CVE-2021-47020soundwire: stream: fix memory leak in stream config error path
CVE-2021-47055mtd: require write permissions for locking and badblock ioctls
CVE-2021-46959spi: Fix use-after-free with devm_spi_alloc_*
CVE-2024-26620s390/vfio-ap: always filter entire AP matrix
CVE-2024-26619riscv: Fix module loading free order
CVE-2024-26618arm64/sme: Always exit sme_alloc() early with existing storage
CVE-2024-26617fs/proc/task_mmu: move mmu notification mechanism inside mm lock
CVE-2024-26616btrfs: scrub: avoid use-after-free when chunk length is not 64K aligned
CVE-2024-26615net/smc: fix illegal rmb_desc access in SMC-D connection dump
CVE-2024-26614tcp: make sure init the accept_queue's spinlocks once
CVE-2024-26612netfs, fscache: Prevent Oops in fscache_put_cache()

Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47066

No comments yet

Leave a comment