kernel: random: add robust get_random_u32, remove weak get_random_int
Published Sep 18, 2009
5.5
MEDIUMCVSS 3.1
EPSS 1.63%
Description
The get_random_int function in drivers/char/random.c in the Linux kernel before 2.6.30 produces insufficiently random numbers, which allows attackers to predict the return value, and possibly defeat protection mechanisms based on randomization, via vectors that leverage the function's tendency to "return the same value over and over again for long stretches of time."
Affected products
No data.
Configuration 1
- < 2.6.30
Configuration 2
- 6.06
- 8.04
- 8.10
- 9.04
Configuration 3
- 11.0
- 10
- 10
No data.
MRG for RHEL-5
kernel-rt-0:2.6.24.7-117.el5rt
Fixed · RHSA-2009:1081
Red Hat Enterprise Linux 4
kernel-0:2.6.9-89.0.11.EL
Fixed · RHSA-2009:1438
Red Hat Enterprise Linux 5
kernel-0:2.6.18-128.1.14.el5
Fixed · RHSA-2009:1106
| Product | Package | State | Advisory |
|---|---|---|---|
| MRG for RHEL-5 | kernel-rt-0:2.6.24.7-117.el5rt | Fixed | RHSA-2009:1081 |
| Red Hat Enterprise Linux 4 | kernel-0:2.6.9-89.0.11.EL | Fixed | RHSA-2009:1438 |
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-128.1.14.el5 | Fixed | RHSA-2009:1106 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:C/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.63% (0.01632) | 75.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.63% (0.01632) | 73.06th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.24% (0.00241) | 45.45th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00107) | 45.02th | v3 (v2023.03.01) |
| Feb 15, 2024 | 0.11% (0.00107) | 41.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.17% (0.00172) | 52.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (17)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8a0a9bd4db63bc45e3017bedeafbd88d0eb84d02 x_refsource_CONFIRMBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html vendor-advisoryx_refsource_SUSEMailing List
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html vendor-advisoryx_refsource_SUSEMailing List
- http://patchwork.kernel.org/patch/21766/ x_refsource_CONFIRMBroken LinkPatch
- http://secunia.com/advisories/37105 third-party-advisoryx_refsource_SECUNIABroken Link
- http://secunia.com/advisories/37351 third-party-advisoryx_refsource_SECUNIABroken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30 x_refsource_CONFIRMBroken LinkExploitVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2009-1438.html vendor-advisoryx_refsource_REDHATBroken Link
- http://www.ubuntu.com/usn/USN-852-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2009-3238 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=499785 x_refsource_CONFIRMIssue TrackingPermissions Required
- https://bugzilla.redhat.com/show_bug.cgi?id=519692 x_refsource_CONFIRMIssue TrackingPermissions Required
- https://bugzilla.redhat.com/show_bug.cgi?id=524512 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-3238
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11168 vdb-entrysignaturex_refsource_OVALBroken Link
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03836en_us x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2009-3238
Change history (0)
No recorded changes yet.