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

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2021-47010— net: Only allow init netns to set default tcp cong to a restricted algo

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

I. Basic Information for CVE-2021-47010

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
net: Only allow init netns to set default tcp cong to a restricted algo
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: Only allow init netns to set default tcp cong to a restricted algo tcp_set_default_congestion_control() is netns-safe in that it writes to &net->ipv4.tcp_congestion_control, but it also sets ca->flags |= TCP_CONG_NON_RESTRICTED which is not namespaced. This has the unintended side-effect of changing the global net.ipv4.tcp_allowed_congestion_control sysctl, despite the fact that it is read-only: 97684f0970f6 ("net: Make tcp_allowed_congestion_control readonly in non-init netns") Resolve this netns "leak" by only allowing the init netns to set the default algorithm to one that is restricted. This restriction could be removed if tcp_allowed_congestion_control were namespace-ified in the future. This bug was uncovered with https://github.com/JonathonReinhart/linux-netns-sysctl-verify
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，该漏洞源于允许设置 ca->flags |= TCP_CONG_NON_RESTRICTED。
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 6670e152447732ba90626f36dfc015a13fbf150e ~ 992de06308d9a9584d59b96d294ac676f924e437 -
LinuxLinux 4.15 -

II. Public POCs for CVE-2021-47010

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-47010

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-02-28 · 86 CVEs total

CVE-2021-46995can: mcp251xfd: mcp251xfd_probe(): fix an error pointer dereference in probe
CVE-2021-46998ethernet:enic: Fix a use after free bug in enic_hard_start_xmit
CVE-2021-46999sctp: do asoc update earlier in sctp_sf_do_dupcook_a
CVE-2021-47001xprtrdma: Fix cwnd update ordering
CVE-2021-47004f2fs: fix to avoid touching checkpointed data in get_victim()
CVE-2021-47003dmaengine: idxd: Fix potential null dereference on pointer status
CVE-2021-47005PCI: endpoint: Fix NULL pointer dereference for ->get_features()
CVE-2021-47007f2fs: fix panic during f2fs_resize_fs()
CVE-2021-47006ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook
CVE-2021-47002SUNRPC: Fix null pointer dereference in svc_rqst_free()
CVE-2021-46997arm64: entry: always set GIC_PRIO_PSR_I_SET during entry
CVE-2021-46996netfilter: nftables: Fix a memleak from userdata error path in new objects
CVE-2021-46994can: mcp251x: fix resume from sleep before interface was brought up
CVE-2021-46992netfilter: nftables: avoid overflows in nft_hash_buckets()
CVE-2021-46993sched: Fix out-of-bound access in uclamp
CVE-2021-46990powerpc/64s: Fix crashes when toggling entry flush barrier
CVE-2021-46991i40e: Fix use-after-free in i40e_client_subtask()
CVE-2021-46989hfsplus: prevent corruption in shrinking truncate
CVE-2021-46987btrfs: fix deadlock when cloning inline extents and using qgroups
CVE-2021-46988userfaultfd: release page in error path to avoid BUG_ON

Showing top 20 of 86 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47010

No comments yet

Leave a comment