Vulnerability Details : CVE-2019-19602
fpregs_state_valid in arch/x86/include/asm/fpu/internal.h in the Linux kernel before 5.4.2, when GCC 9 is used, allows context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact because of incorrect fpu_fpregs_owner_ctx caching, as demonstrated by mishandling of signal-based non-cooperative preemption in Go 1.14 prereleases on amd64, aka CID-59c4bd853abc.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2019-19602
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-19602
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-19602
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.4
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:N/A:P |
3.4
|
7.8
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L |
1.8
|
4.2
|
NIST |
CWE ids for CVE-2019-19602
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19602
-
https://usn.ubuntu.com/4284-1/
USN-4284-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
Release Notes;Vendor Advisory
-
https://bugzilla.kernel.org/show_bug.cgi?id=205663
205663 – AVX register corruption from signal deliveryIssue Tracking;Third Party Advisory
-
https://github.com/golang/go/issues/35777#issuecomment-561935388
runtime: memory corruption on Linux 5.2+ · Issue #35777 · golang/go · GitHubIssue Tracking;Third Party Advisory
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https://github.com/torvalds/linux/commit/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98
x86/fpu: Don't cache access to fpu_fpregs_owner_ctx · torvalds/linux@59c4bd8 · GitHubExploit;Third Party Advisory
-
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59c4bd853abcea95eccc167a7d7fd5f1a5f47b98
kernel/git/torvalds/linux.git - Linux kernel source treeExploit;Vendor Advisory
-
https://security.netapp.com/advisory/ntap-20200103-0001/
December 2019 Linux Kernel Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
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