CVE-2009-2847 EXPLOIT
4.9
MEDIUM · CVSS 2.0 · EPSS 0.9% (pctl 60)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 4.9 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:L/AC:L/Au:N/C:C/I:N/A:N |
| EPSS | 0.94% — more likely to be exploited than 60% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2009-08-18 |
| Last modified | 2026-06-16 |
Affected (3)
| Vendor | Product |
|---|---|
| linux | kernel |
| linux | linux |
| linux | linux kernel |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Linux Kernel 2.6.31-rc5 - sigaltstack 4-Byte Stack Disclosure | 2009-08-04 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=0083fc2c50e6c5127c2802ad323adf8143ab7856
- 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
- http://www.openwall.com/lists/oss-security/2009/08/05/1
- 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
- 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
→ the Explorer · watch your stack · NVD