CVE detail
CVE-2021-33909
fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 17.9 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
5 source links · newest first
- Security Affairs most-read cyber stories of 2021Security Affairs
Which are the most-read cyber stories of 2021? This post includes Top Posts for the last 365 days. Why Edward Snowden is urging users to stop using ExpressVPN? The popular whistleblower Edward Snowden recommends customers of ExpressVPN VPN service to stop using it. Two kids found a screensaver bypass in Linux Mint The development team […]
newssecurityaffairs.comJan 1, 2022, 5:34 PM - 26th July – Threat Intelligence ReportCheck Point Research
For the latest discoveries in cyber research for the week of 26th July, please download our Threat Intelligence Bulletin. Top Attacks and Breaches US officials have reported that Chinese state-sponsored threat actors successfully breached 13 US oil and natural gas pipeline companies between 2011 and 2013. The hackers gained initial access using a spear-phishing campaign, […]
vendorresearch.checkpoint.comJul 26, 2021, 1:54 PM Here’s an overview of some of last week’s most interesting news and articles: Kaseya obtains universal REvil decryptor There’s finally some good news for the MSPs and their customers that have been hit by the REvil ransomware gang via compromised Kaseya VSA software: a universal decryptor has made it available to affected organizations. DDoS attacks are up, with ever-greater network impact With an overall rise in available network capacity, cyber criminals are increasingly targeting their … More →
newswww.helpnetsecurity.comJul 25, 2021, 8:56 AMExperts discovered a Local Privilege Escalation, tracked as CVE-2021-33909, that could allow attackers to get root access on most Linux distros. Qualys researchers discovered a local privilege escalation (LPE) tracked as CVE-2021-33909, aka Sequoia, an unprivileged attacker can exploit the flaw to get root privileges on most Linux distros. The issue is a size_t-to-int type […]
newssecurityaffairs.comJul 21, 2021, 5:27 AM- Researchers flag 7-years-old privilege escalation flaw in Linux kernel (CVE-2021-33909)Help Net Security
A vulnerability (CVE-2021-33909) in the Linux kernel’s filesystem layer that may allow local, unprivileged attackers to gain root privileges on a vulnerable host has been unearthed by researchers. “Qualys security researchers have been able to independently verify the vulnerability, develop an exploit, and obtain full root privileges on default installations of Ubuntu 20.04, Ubuntu 20.10, Ubuntu 21.04, Debian 11, and Fedora 34 Workstation. Other Linux distributions are likely vulnerable and probably exploitable,” said Bharat Jogi, … More →
newswww.helpnetsecurity.comJul 20, 2021, 4:26 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
Related records
Similar CVEs
6 related CVEs with shared weakness or product evidence
- CVE-2021-41864CVSS 7.8 · High
prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel before 5.14.12 allows unprivileged users to trigger an eBPF multiplication integer overflow with a resulta…
- CVE-2019-14816CVSS 7.8 · High
There is heap-based buffer overflow in kernel, all versions up to, excluding 5.3, in the marvell wifi chip driver in Linux kernel, that allows local users to cause a denial of ser…
- CVE-2019-3846CVSS 8.8 · High
A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network.
- CVE-2021-38166CVSS 7.8 · High
In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds write when many elements are placed in a single bucket. NOTE: exploitati…
- CVE-2022-32208CVSS 5.9 · Medium
When curl < 7.84.0 does FTP transfers secured by krb5, it handles message verification failures wrongly. This flaw makes it possible for a Man-In-The-Middle attack to go unnoticed…
- CVE-2022-1619CVSS 7.8 · High
Heap-based Buffer Overflow in function cmdline_erase_chars in GitHub repository vim/vim prior to 8.2.4899. This vulnerabilities are capable of crashing software, modify memory, an…