CVE-2019-19602: Buffer Overflow
First published: Thu Dec 05 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | <5.4.2 | |
| Ubuntu Linux | =18.04 | |
| Ubuntu Linux | =19.10 | |
| Linux Kernel | <5.4.2 | |
| Ubuntu | =18.04 | |
| Ubuntu | =19.10 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- https://bugzilla.kernel.org/show_bug.cgi?id=205663
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59c4bd853abcea95eccc167a7d7fd5f1a5f47b98
- https://github.com/golang/go/issues/35777#issuecomment-561935388
- https://github.com/torvalds/linux/commit/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98
- https://security.netapp.com/advisory/ntap-20200103-0001/
- https://usn.ubuntu.com/4284-1/
- https://launchpad.net/bugs/cve/CVE-2019-19602
- https://git.kernel.org/linus/59c4bd853abcea95eccc167a7d7fd5f1a5f47b98
- https://security-tracker.debian.org/tracker/CVE-2019-19602
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19602
- https://nvd.nist.gov/vuln/detail/CVE-2019-19602
- https://ubuntu.com/security/CVE-2019-19602
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-19602.
What is the severity of CVE-2019-19602?
The severity of CVE-2019-19602 is not specified.
What is the affected software for CVE-2019-19602?
The affected software for CVE-2019-19602 includes Linux kernel versions before 5.4.2 when GCC 9 is used.
How can this vulnerability be exploited?
This vulnerability can be exploited by context-dependent attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact due to incorrect fpu_fpregs_owner_ctx caching.
How can I fix the vulnerability CVE-2019-19602?
To fix the vulnerability CVE-2019-19602, you should update your Linux kernel to version 5.5 or later.
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