CVE-2012-2127
CVE-2012-2127 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
fs/proc/root.c in the procfs implementation in the Linux kernel before 3.2 does not properly interact with CLONE_NEWPID clone system calls, which allows remote attackers to cause a denial of service (reference leak and memory consumption) by making many connections to a daemon that uses PID namespaces to isolate clients, as demonstrated by vsftpd.
Frequently asked questions
- What is CVE-2012-2127?
- fs/proc/root.c in the procfs implementation in the Linux kernel before 3.2 does not properly interact with CLONE_NEWPID clone system calls, which allows remote attackers to cause a denial of service (reference leak and memory consumption) by making many connections to a daemon that uses PID namespaces to isolate clients, as demonstrated by vsftpd.
- How severe is CVE-2012-2127?
- CVE-2012-2127 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2012-2127 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2012-2127?
- CVE-2012-2127 primarily affects Linux Linux Kernel. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2012-2127?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2012-2127 published?
- CVE-2012-2127 was published on 2012-06-21 and last updated on 2026-06-16.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=905ad269c55fc62bee3da29f7b1d1efeba8aa1e1
- http://ubuntu.com/usn/usn-1607-1
- http://www.kernel.org/pub/linux/kernel/v3.x/
- http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.bz2
- http://www.openwall.com/lists/oss-security/2012/04/20/25
- http://www.openwall.com/lists/oss-security/2012/04/22/1
- http://www.securityfocus.com/bid/55774
- http://www.ubuntu.com/usn/USN-1594-1
- https://bugzilla.novell.com/show_bug.cgi?id=757783
- https://bugzilla.redhat.com/show_bug.cgi?id=815188
- https://github.com/torvalds/linux/commit/905ad269c55fc62bee3da29f7b1d1efeba8aa1e1
Affected products (10)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.8:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*
More vulnerabilities in Linux Linux Kernel
- CVE-2023-2163 — Critical (CVSS 10.0): Incorrect verifier pruning in BPF in Linux Kernel >=5.4 leads to unsafe code paths being incorrectly marked as safe,…
- CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
- CVE-2015-1421 — Critical (CVSS 10.0): Use-after-free vulnerability in the sctp_assoc_update function in net/sctp/associola.c in the Linux kernel before…
- CVE-2014-2523 — Critical (CVSS 10.0): net/netfilter/nf_conntrack_proto_dccp.c in the Linux kernel through 3.13.6 uses a DCCP header pointer incorrectly,…
- CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
- CVE-2010-2521 — Critical (CVSS 10.0): Multiple buffer overflows in fs/nfsd/nfs4xdr.c in the XDR implementation in the NFS server in the Linux kernel before…
All CVEs affecting Linux Linux Kernel →
Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities
- CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
- CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
- CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
- CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
- CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.