CVE-2017-17053

low-risk
Published 2017-11-29

The init_new_context function in arch/x86/include/asm/mmu_context.h in the Linux kernel before 4.12.10 does not correctly handle errors from LDT table allocation when forking a new process, allowing a local attacker to achieve a use-after-free or possibly have unspecified other impact by running a specially crafted program. This vulnerability only affected kernels built with CONFIG_MODIFY_LDT_SYSCALL=y.

Do I need to act?

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0.11% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10 High
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Linux

References (10)

Issue Tracking http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ccd5b3...
Third Party Advisory http://www.securityfocus.com/bid/102010
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0676
Patch https://github.com/torvalds/linux/commit/ccd5b3235180eef3cfec337df1c8554ab151b5c...
Issue Tracking https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.12.10
Issue Tracking http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ccd5b3...
Third Party Advisory http://www.securityfocus.com/bid/102010
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0676
Patch https://github.com/torvalds/linux/commit/ccd5b3235180eef3cfec337df1c8554ab151b5c...
Issue Tracking https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.12.10
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal