CVE-2006-5755 json
Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows…
published 2006-12-31 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-5739
- cvss
- 4.9
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
Summary
Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.
Patch / fix
- kernel RHEL 5 2.6.18-92.1.18.el5
- kernel-PAE RHEL 5 2.6.18-92.1.18.el5
- kernel-xen RHEL 5 2.6.18-92.1.18.el5
- kernel-kdump RHEL 5 2.6.18-92.1.18.el5
- kernel-debuginfo-common RHEL 5 2.6.18-92.1.18.el5
red hat advisories RHSA-2008:0957
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-2006-5755 updated
kernel: local denial of service due to NT bit leakage
-
Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-92.1.18.el5, kernel-PAE 2.6.18-92.1.18.el5, kernel-xen 2.6.18-92.1.18.el5, kernel-kdump 2.6.18-92.1.18.el5, kernel-debuginfo-common 2.6.18-92.1.18.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-92.1.18.el5, kernel-PAE 2.6.18-92.1.18.el5, kernel-xen 2.6.18-92.1.18.el5, kernel-kdump 2.6.18-92.1.18.el5, kernel-debuginfo-common 2.6.18-92.1.18.el5fixed: vendor fix RHSA-2008:0957
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
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Technology feeds
References
-
redhat.com
/support/errata/RHSA-2008-0957.html
vendor-advisory
-
mandriva.com
/security/advisories?name=MDKSA-2007:171
vendor-advisory
-
ubuntu.com
/usn/usn-416-1
vendor-advisory
-
debian.org
/security/2007/dsa-1381
vendor-advisory
-
secunia.com
/advisories/32485
third-party-advisory
-
secunia.com
/advisories/24098
third-party-advisory
- kernel.org /git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
-
secunia.com
/advisories/26994
third-party-advisory
-
securityfocus.com
/bid/26060
vdb-entry
-
secunia.com
/advisories/26620
third-party-advisory
- kernel.org /pub/linux/kernel/v2.6/snapshots/patch-2.6.18-git13.log
-
securityfocus.com
/archive/1/471457
mailing-list
- git.kernel.org /?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=658fdbef66e5e9be79b457edc2cbbb3add840aa9
- kernel.org /pub/linux/kernel/v2.6/ChangeLog-2.6.18
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9554
vdb-entry, signature
-
secunia.com
/advisories/25691
third-party-advisory
Sources
- CVE List CVE-2006-5755
- NVD CVE-2006-5755
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