CVE-2007-0257

Exp

Unspecified vulnerability in the expand_stack function in grsecurity PaX allows local users to gain privileges via unspecified vectors. NOTE: the grsecurity developer has disputed this issue, stating that "the function they claim the vulnerability to be in is a trivial function, which can, and has been, easily checked for any supposed vulnerabilities." The developer also cites a past disclosure that was not proven. As of 20070120, the original researcher has released demonstration code

Published: 2007-01-16 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-0257 is rated High Exploit Risk (63.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.26%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2007-0257

EDB-ID Source Kind Published Link
29446 exploit_db edb 2006-12-18 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2007-0257

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-15 0.14% 0.26% +0.12%
2 2025-03-30 0.30% 0.14% -0.16%
3 2025-03-29 — 0.30% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-0257

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2007-0257

OS Trackers for CVE-2007-0257

vendor priority summary link
alpine — CVE-2007-0257: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2007-0257

Affected software / configurations for CVE-2007-0257

Vendor Product Version Raw CPE
grsecurity grsecurity_kernel_patch 1.9.4 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:1.9.4:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.0.1 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.0.1:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.0.2 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.0.2:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.0 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.0:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.1 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.1:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.2 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.2:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.3 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.3:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.4 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.4:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.5 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.5:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.6 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.6:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.7 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.7:*:*:*:*:*:*:*
grsecurity grsecurity_kernel_patch 2.1.8 cpe:2.3:a:grsecurity:grsecurity_kernel_patch:2.1.8:*:*:*:*:*:*:*

References for CVE-2007-0257

cvelogic Threat Intelligence