kernel: race condition can wake up a PTRACED process
Published Jan 15, 2020
5.9
MEDIUMCVSS 3.1
EPSS 1.73%
Description
The Linux kernel before 2.4.36-rc1 has a race condition. It was possible to bypass systrace policies by flooding the ptraced process with SIGCONT signals, which can can wake up a PTRACED process.
Affected products
No data.
- ≤ 2.4.35
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/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 2, 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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.73% (0.01730) | 76.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.74% (0.01738) | 74.67th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.18% (0.00181) | 37.52th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.19% (0.00194) | 58.29th | v3 (v2023.03.01) |
| May 8, 2023 | 0.19% (0.00194) | 55.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00106) | 41.40th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
References (7)
- http://taviso.decsystem.org/research.html x_refsource_MISCThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2007-4774 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1858294 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2007-4774
- https://osdn.net/projects/linux-kernel-docs/scm/git/linux-2.4.36/listCommit?skip=60 x_refsource_MISCIssue TrackingThird Party Advisory
- https://security.netapp.com/advisory/ntap-20200204-0002/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2007-4774
| Link | Providers | Tags |
|---|---|---|
| http://taviso.decsystem.org/research.html | x_refsource_MISCThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2007-4774 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1858294 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2007-4774 | ||
| https://osdn.net/projects/linux-kernel-docs/scm/git/linux-2.4.36/listCommit?skip=60 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://security.netapp.com/advisory/ntap-20200204-0002/ | x_refsource_CONFIRM | |
| https://www.cve.org/CVERecord?id=CVE-2007-4774 |
Change history (0)
No recorded changes yet.