CVE-2020-13974
HIGH
7.8
CVSS Score
Published: June 9, 2020 at 04:06 AM UTC
Updated: June 17, 2026 at 02:54 AM UTC
3 products affected across 3 vendorsLinux KernelDebian LinuxUbuntu Linux
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Severity
HIGH7.8
Exploit prediction
EPSS 0.6%
Description
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%Debian Linux· Debiandrupal
95%v < 4.4.2274.10 ≤ v < 4.14.1844.15 ≤ v < 4.19.1284.20 ≤ v < 5.4.464.5 ≤ v < 4.9.2275.5 ≤ v < 5.6.185.7 ≤ v < 5.7.2
Affected range stops below 4.14.184, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.19.128, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.227, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.227, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.46, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.6.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.7.2, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932b
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aae
- https://lkml.org/lkml/2020/3/22/482
References (12)
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlVendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlx_refsource_MISCVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=dad0bf9ce93fa40b667eccd3306783f4db4b932bx_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aaeMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/08/msg00019.htmlVendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4427-1/Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4439-1/CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-190
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