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CVE-2017-18075

HIGH
7.8
CVSS Score
Published: January 24, 2018 at 10:00 AM UTC
Updated: June 17, 2026 at 01:12 AM UTC
2 products affected across 2 vendorsLinux KernelUbuntu Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

Description

crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have unspecified other impact by executing a crafted sequence of system calls.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
14.0416.04
Linux Kernel· Linux
95%
4.10 ≤ v < 4.14.134.2 ≤ v < 4.4.1114.5 ≤ v < 4.9.76
Affected range stops below 4.14.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.4.111, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.76, so it looks safe — our inference, not a vendor statement

References (7)

x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/102813
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2018:2948
x_refsource_CONFIRMPatch
Source: [email protected]
https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/3619-1/
Vendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/3619-2/
x_refsource_CONFIRMIssue TrackingRelease NotesVendor Advisory
Source: [email protected]
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-763

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