Skip to content
Fencer Intel
medium 4.9

CVE-2013-7263 json

The Linux kernel before 3.12.4 updates certain length values before ensuring that associated data structures have been initialized, which a…

published 2014-01-06 12 y ago modified 2026-06-17 4 mo ago also EUVD-2013-7041

cvss
4.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

The Linux kernel before 3.12.4 updates certain length values before ensuring that associated data structures have been initialized, which allows local users to obtain sensitive information from kernel stack memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call, related to net/ipv4/ping.c, net/ipv4/raw.c, net/ipv4/udp.c, net/ipv6/raw.c, and net/ipv6/udp.c.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.12.6-1

debian advisories DEBIAN-CVE-2013-7263

  • kernel RHEL 5 2.6.18-371.6.1.el5
  • kernel-PAE RHEL 5 2.6.18-371.6.1.el5
  • kernel-xen RHEL 5 2.6.18-371.6.1.el5
  • kernel-kdump RHEL 5 2.6.18-371.6.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-371.6.1.el5
  • kernel RHEL 6 2.6.32-431.5.1.el6
  • perf RHEL 6 2.6.32-431.5.1.el6
  • python-perf RHEL 6 2.6.32-431.5.1.el6

red hat advisories RHSA-2014:0285RHSA-2014:0159RHSA-2014:0439

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-7263 updated cvss 2.1

Kernel: net: leakage of uninitialized memory to user-space via recv syscalls

  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-371.6.1.el5, kernel-PAE 2.6.18-371.6.1.el5, kernel-xen 2.6.18-371.6.1.el5, kernel-kdump 2.6.18-371.6.1.el5, kernel-debuginfo-common 2.6.18-371.6.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-371.6.1.el5, kernel-PAE 2.6.18-371.6.1.el5, kernel-xen 2.6.18-371.6.1.el5, kernel-debuginfo-common 2.6.18-371.6.1.el5
    fixed: vendor fix RHSA-2014:0285
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-431.5.1.el6, kernel 2.6.32-431.5.1.el6, kernel-firmware 2.6.32-431.5.1.el6, kernel-abi-whitelists 2.6.32-431.5.1.el6, kernel-debuginfo-common-i686 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) kernel 2.6.32-431.5.1.el6, python-perf 2.6.32-431.5.1.el6, kernel-debuginfo-common-i686 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-431.5.1.el6, kernel 2.6.32-431.5.1.el6, kernel-firmware 2.6.32-431.5.1.el6, kernel-abi-whitelists 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel 2.6.32-431.5.1.el6, python-perf 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-431.5.1.el6, kernel 2.6.32-431.5.1.el6, kernel-kdump 2.6.32-431.5.1.el6, kernel-firmware 2.6.32-431.5.1.el6, kernel-bootwrapper 2.6.32-431.5.1.el6, kernel-abi-whitelists 2.6.32-431.5.1.el6, +4 more Red Hat Enterprise Linux Server Optional (v. 6) kernel 2.6.32-431.5.1.el6, python-perf 2.6.32-431.5.1.el6, kernel-debuginfo-common-i686 2.6.32-431.5.1.el6, kernel-debuginfo-common-ppc64 2.6.32-431.5.1.el6, kernel-debuginfo-common-s390x 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-431.5.1.el6, kernel 2.6.32-431.5.1.el6, kernel-firmware 2.6.32-431.5.1.el6, kernel-abi-whitelists 2.6.32-431.5.1.el6, kernel-debuginfo-common-i686 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) kernel 2.6.32-431.5.1.el6, python-perf 2.6.32-431.5.1.el6, kernel-debuginfo-common-i686 2.6.32-431.5.1.el6, kernel-debuginfo-common-x86_64 2.6.32-431.5.1.el6
    fixed: vendor fix RHSA-2014:0159
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.33-rt32.33.el6rt, kernel-rt-trace 3.10.33-rt32.33.el6rt, kernel-rt-vanilla 3.10.33-rt32.33.el6rt, kernel-rt-firmware 3.10.33-rt32.33.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.33-rt32.33.el6rt
    fixed: vendor fix RHSA-2014:0439
  • Red Hat Enterprise Linux (v. 5 server) kernel-headers 2.6.18-371.6.1.el5 Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux Desktop (v. 5 client) kernel-headers 2.6.18-371.6.1.el5
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:C/I:N/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.