kernel: a race out-of-bound read in vt
Published Feb 16, 2022
4.7
MEDIUMCVSS 3.1
EPSS 0.36%
Description
A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.
Affected products
- Vendor n/a Product Kernel Defaultn/a
- Version Linux kernel 5.15-rc1StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Kernel | n/a |
|
Configuration 1
- < 5.15
Configuration 2
- 7.0
- 8.0
Configuration 3
- n/a
- n/a
- n/a
- n/a
Configuration 4
- n/a
Running on/with
- n/a
Configuration 5
- n/a
Configuration 6
- n/a
Configuration 7
- n/a
Configuration 8
- n/a
Configuration 9
- n/a
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-553.el8_10
Fixed · RHSA-2024:3138
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.rt7.342.el8_10
Fixed · RHSA-2024:2950
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-rt
Out of support scope
Red Hat Enterprise Linux 9
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-553.el8_10 | Fixed | RHSA-2024:3138 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-553.rt7.342.el8_10 | Fixed | RHSA-2024:2950 |
| 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 | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Out of support scope | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:P/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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.36% (0.00364) | 27.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.36% (0.00364) | 28.03th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.01% (0.00011) | 0.74th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00058) | 25.95th | v3 (v2023.03.01) |
| May 10, 2024 | 0.06% (0.00058) | 23.40th | v3 (v2023.03.01) |
| Apr 30, 2024 | 0.04% (0.00045) | 14.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.21th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Oct 29, 2022 | 0.95% (0.00950) | 31.13th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00890) | 28.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Feb 17, 2022 | 0.89% (0.00890) | 12.61th | v2 (v2022.01.01) |
References (7)
- https://access.redhat.com/security/cve/CVE-2021-3753 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1999589 Issue TrackingPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7 PatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-3753
- https://security.netapp.com/advisory/ntap-20221028-0003/ Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2021-3753
- https://www.openwall.com/lists/oss-security/2021/09/01/4 ExploitMailing ListPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3753 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1999589 | Issue TrackingPatchThird Party Advisory | |
| https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7 | PatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2021-3753 | ||
| https://security.netapp.com/advisory/ntap-20221028-0003/ | Third Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2021-3753 | ||
| https://www.openwall.com/lists/oss-security/2021/09/01/4 | ExploitMailing ListPatchThird Party Advisory |
Change history (0)
No recorded changes yet.