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Vulnerability record · CVE-2009-2847 · published 18 August 2009

CVE-2009-2847: Linux kernel vulnerability

Linux · Kernel

The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.

4.9 CVSS 2.0 Medium EPSS 0.94% · top 40.7%
4.9CVSS 2.0 base score
0.94%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
42References
16 Jun 2026Last modified by NVD

Description

The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.

AV:L/AC:L/Au:N/C:C/I:N/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab
http://rhn.redhat.com/errata/RHSA-2009-1243.html
http://secunia.com/advisories/36136
http://secunia.com/advisories/36501
http://secunia.com/advisories/36562
http://secunia.com/advisories/36759
http://secunia.com/advisories/37105
http://secunia.com/advisories/37471
http://www.exploit-db.com/exploits/9352
http://www.openwall.com/lists/oss-security/2009/08/04/1 Patch
http://www.openwall.com/lists/oss-security/2009/08/05/1 Patch
http://www.openwall.com/lists/oss-security/2009/08/26/2
http://www.redhat.com/support/errata/RHSA-2009-1438.html
http://www.securityfocus.com/archive/1/507985/100/0/threaded
http://www.ubuntu.com/usn/USN-852-1
http://www.vmware.com/security/advisories/VMSA-2009-0016.html
http://www.vupen.com/english/advisories/2009/3316
https://bugzilla.redhat.com/show_bug.cgi?id=515392 Patch
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10637
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8405
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab
http://rhn.redhat.com/errata/RHSA-2009-1243.html
http://secunia.com/advisories/36136
http://secunia.com/advisories/36501
http://secunia.com/advisories/36562
http://secunia.com/advisories/36759
http://secunia.com/advisories/37105
http://secunia.com/advisories/37471
http://www.exploit-db.com/exploits/9352
http://www.openwall.com/lists/oss-security/2009/08/04/1 Patch
http://www.openwall.com/lists/oss-security/2009/08/05/1 Patch
http://www.openwall.com/lists/oss-security/2009/08/26/2
http://www.redhat.com/support/errata/RHSA-2009-1438.html
http://www.securityfocus.com/archive/1/507985/100/0/threaded
http://www.ubuntu.com/usn/USN-852-1
http://www.vmware.com/security/advisories/VMSA-2009-0016.html
http://www.vupen.com/english/advisories/2009/3316
https://bugzilla.redhat.com/show_bug.cgi?id=515392 Patch
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10637

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Source: NIST National Vulnerability Database (record CVE-2009-2847), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.