CVE-2021-30178

    Dashboard / Vulnerabilities / CVE-2021-30178

    CVE-2021-30178

    Published: 7 Apr 2021Last Modified: 11 Feb 2026

    Summary:

    Details: An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJ5GEETMX3ERQ4DF3GSS2XPNSOOK44OB/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TGQDVYCDM3F5VXUZIADIV2ERL3AJXNJS/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M/, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=919f4ebc598701670e80e31573a58f1f2d2bf918, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=919f4ebc598701670e80e31573a58f1f2d2bf918

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -919f4ebc598701670e80e31573a58f1f2d2bf918

    Affected versions

    v2.6.12
    v2.6.12-rc2
    v2.6.12-rc3
    v2.6.12-rc4
    v2.6.12-rc5
    v2.6.12-rc6
    v2.6.13
    v2.6.13-rc1
    v2.6.13-rc2
    v2.6.13-rc3
    v2.6.13-rc4
    v2.6.13-rc5
    v2.6.13-rc6
    v2.6.13-rc7
    v2.6.14
    v2.6.14-rc1
    v2.6.14-rc2
    v2.6.14-rc3
    v2.6.14-rc4
    v2.6.14-rc5
    v2.6.15
    v2.6.15-rc1
    v2.6.15-rc2
    v2.6.15-rc3
    v2.6.15-rc4
    v2.6.15-rc5
    v2.6.15-rc6
    v2.6.15-rc7
    v2.6.16
    v2.6.16-rc1
    v2.6.16-rc2
    v2.6.16-rc3
    v2.6.16-rc4
    v2.6.16-rc5
    v2.6.16-rc6
    v2.6.17
    v2.6.17-rc1
    v2.6.17-rc2
    v2.6.17-rc3
    v2.6.17-rc4
    v2.6.17-rc5
    v2.6.17-rc6
    v2.6.18
    v2.6.18-rc1
    v2.6.18-rc2
    v2.6.18-rc3
    v2.6.18-rc4
    v2.6.18-rc5
    v2.6.18-rc6
    v2.6.18-rc7
    v2.6.19
    v2.6.19-rc1
    v2.6.19-rc2
    v2.6.19-rc3
    v2.6.19-rc4
    v2.6.19-rc5
    v2.6.19-rc6
    v2.6.20
    v2.6.20-rc1
    v2.6.20-rc2
    v2.6.20-rc3
    v2.6.20-rc4
    v2.6.20-rc5
    v2.6.20-rc6
    v2.6.20-rc7
    v2.6.21
    v2.6.21-rc1
    v2.6.21-rc2
    v2.6.21-rc3
    v2.6.21-rc4
    v2.6.21-rc5
    v2.6.21-rc6
    v2.6.21-rc7
    v2.6.22
    v2.6.22-rc1
    v2.6.22-rc2
    v2.6.22-rc3
    v2.6.22-rc4
    v2.6.22-rc5
    v2.6.22-rc6
    v2.6.22-rc7
    v2.6.23
    v2.6.23-rc1
    v2.6.23-rc2
    v2.6.23-rc3
    v2.6.23-rc4
    v2.6.23-rc5
    v2.6.23-rc6
    v2.6.23-rc7
    v2.6.23-rc8
    v2.6.23-rc9
    v2.6.24
    v2.6.24-rc1
    v2.6.24-rc2
    v2.6.24-rc3
    v2.6.24-rc4
    v2.6.24-rc5
    v2.6.24-rc6
    v2.6.24-rc7
    v2.6.24-rc8
    v2.6.25
    v2.6.25-rc1
    v2.6.25-rc2
    v2.6.25-rc3
    v2.6.25-rc4
    v2.6.25-rc5
    v2.6.25-rc6
    v2.6.25-rc7
    v2.6.25-rc8
    v2.6.25-rc9
    v2.6.26
    v2.6.26-rc1
    v2.6.26-rc2
    v2.6.26-rc3
    v2.6.26-rc4
    v2.6.26-rc5
    v2.6.26-rc6
    v2.6.26-rc7
    v2.6.26-rc8
    v2.6.26-rc9
    v2.6.27
    v2.6.27-rc1
    v2.6.27-rc2
    v2.6.27-rc3
    v2.6.27-rc4
    v2.6.27-rc5
    v2.6.27-rc6
    v2.6.27-rc7
    v2.6.27-rc8
    v2.6.27-rc9
    v2.6.28
    v2.6.28-rc1
    v2.6.28-rc2
    v2.6.28-rc3
    v2.6.28-rc4
    v2.6.28-rc5
    v2.6.28-rc6
    v2.6.28-rc7
    v2.6.28-rc8
    v2.6.28-rc9
    v2.6.29
    v2.6.29-rc1
    v2.6.29-rc2
    v2.6.29-rc3
    v2.6.29-rc4
    v2.6.29-rc5
    v2.6.29-rc6
    v2.6.29-rc7
    v2.6.29-rc8
    v2.6.30
    v2.6.30-rc1
    v2.6.30-rc2
    v2.6.30-rc3
    v2.6.30-rc4
    v2.6.30-rc5
    v2.6.30-rc6
    v2.6.30-rc7
    v2.6.30-rc8
    v2.6.31
    v2.6.31-rc1
    v2.6.31-rc2
    v2.6.31-rc3
    v2.6.31-rc4
    v2.6.31-rc5
    v2.6.31-rc6
    v2.6.31-rc7
    v2.6.31-rc8
    v2.6.31-rc9
    v2.6.32
    v2.6.32-rc1
    v2.6.32-rc2
    v2.6.32-rc3
    v2.6.32-rc4
    v2.6.32-rc5
    v2.6.32-rc6
    v2.6.32-rc7
    v2.6.32-rc8
    v2.6.33
    v2.6.33-rc1
    v2.6.33-rc2
    v2.6.33-rc3
    v2.6.33-rc4
    v2.6.33-rc5
    v2.6.33-rc6
    v2.6.33-rc7
    v2.6.33-rc8
    v2.6.34
    v2.6.34-rc1
    v2.6.34-rc2
    v2.6.34-rc3
    v2.6.34-rc4
    v2.6.34-rc5
    v2.6.34-rc6
    v2.6.34-rc7
    v2.6.35
    v2.6.35-rc1
    v2.6.35-rc2
    v2.6.35-rc3
    v2.6.35-rc4
    v2.6.35-rc5
    v2.6.35-rc6
    v2.6.36
    v2.6.36-rc1
    v2.6.36-rc2
    v2.6.36-rc3
    v2.6.36-rc4
    v2.6.36-rc5
    v2.6.36-rc6
    v2.6.36-rc7
    v2.6.36-rc8
    v2.6.37
    v2.6.37-rc1
    v2.6.37-rc2
    v2.6.37-rc3
    v2.6.37-rc4
    v2.6.37-rc5
    v2.6.37-rc6
    v2.6.37-rc7
    v2.6.37-rc8
    v2.6.38
    v2.6.38-rc1
    v2.6.38-rc2
    v2.6.38-rc3
    v2.6.38-rc4
    v2.6.38-rc5
    v2.6.38-rc6
    v2.6.38-rc7
    v2.6.38-rc8
    v2.6.39
    v2.6.39-rc1
    v2.6.39-rc2
    v2.6.39-rc3
    v2.6.39-rc4
    v2.6.39-rc5
    v2.6.39-rc6
    v2.6.39-rc7

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-30178 | CVE-DB