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Fencer Intel
high 8.8

CVE-2011-3191 json

Integer signedness error in the CIFSFindNext function in fs/cifs/cifssmb.c in the Linux kernel before 3.1 allows remote CIFS servers to cau…

published 2012-05-24 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3155

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

Integer signedness error in the CIFSFindNext function in fs/cifs/cifssmb.c in the Linux kernel before 3.1 allows remote CIFS servers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a large length value in a response to a read request for a directory.

Patch / fix

  • linux linux_kernel 3.0.5
  • kernel RHEL 6 2.6.32-131.21.1.el6
  • perf RHEL 6 2.6.32-131.21.1.el6
  • kernel-kdump RHEL 6 2.6.32-131.21.1.el6
  • kernel-firmware RHEL 6 2.6.32-131.21.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-131.21.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-131.21.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-131.21.1.el6
  • kernel-debuginfo-common-s390x RHEL 6 2.6.32-131.21.1.el6

red hat advisories RHSA-2011:1465RHSA-2011:1386RHSA-2012:0010

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-2011-3191 updated cvss 6.8

kernel: cifs: signedness issue in CIFSFindNext()

  • Red Hat Enterprise Linux 4 kernel
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-274.7.1.el5, kernel-PAE 2.6.18-274.7.1.el5, kernel-xen 2.6.18-274.7.1.el5, kernel-kdump 2.6.18-274.7.1.el5, kernel-debuginfo-common 2.6.18-274.7.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-274.7.1.el5, kernel-PAE 2.6.18-274.7.1.el5, kernel-xen 2.6.18-274.7.1.el5, kernel-debuginfo-common 2.6.18-274.7.1.el5
    fixed: vendor fix RHSA-2011:1386
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-131.21.1.el6, kernel 2.6.32-131.21.1.el6, kernel-kdump 2.6.32-131.21.1.el6, kernel-firmware 2.6.32-131.21.1.el6, kernel-bootwrapper 2.6.32-131.21.1.el6, kernel-debuginfo-common-i686 2.6.32-131.21.1.el6, +3 more
    fixed: vendor fix RHSA-2011:1465
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 2.6.33.9-rt31.79.el6rt, kernel-rt-trace 2.6.33.9-rt31.79.el6rt, kernel-rt-vanilla 2.6.33.9-rt31.79.el6rt, kernel-rt-firmware 2.6.33.9-rt31.79.el6rt, kernel-rt-debuginfo-common-x86_64 2.6.33.9-rt31.79.el6rt
    fixed: vendor fix RHSA-2012:0010
  • Red Hat Enterprise Linux (v. 5 server) kernel-headers 2.6.18-274.7.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel-headers 2.6.18-274.7.1.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

1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 8.3 AV:A/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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.