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CVE-2020-36385

kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free

An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is called, aka CID-f5449e74802c.

CVSS 3.1 · 7.8 High EPSS 1.5% KEV · Not listed
Vendors
Linux Netapp Redhat and 1 more
Products
Linux Kernel H300e H300e Firmware and 23 more
CVE-2020-36322

kernel: fuse: fuse_do_getattr() calls make_bad_inode() in inappropriate situations

An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as CVE-2021-28950.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Redhat and 1 more
Products
Debian Linux Linux Kernel Enterprise Linux and 3 more
CVE-2020-35513

kernel: Nfsd failure to clear umask after processing an open or create

A flaw incorrect umask during file or directory modification in the Linux kernel NFS (network file system) functionality was found in the way user create and delete object using NFSv4.2 or newer if both simultaneously accessing the NFS by the other process that is not using new NFSv4.2. A user with access to the NFS could use this flaw to starve the resources causing denial of service.

CVSS 3.1 · 4.9 Medium EPSS 1.4% KEV · Not listed
Vendors
Linux Redhat
Products
Linux Kernel Enterprise Linux Rhel Extras Rt
CVE-2020-2732

Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources

A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Rhel Extras Rt
CVE-2020-29661

kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.

CVSS 3.1 · 7.8 High EPSS 1.1% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 4 more
Products
Fabric Operating System Debian Linux Fedora and 22 more
CVE-2020-28374

kernel: SCSI target (LIO) write to any block on ILO backstore

In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore.

CVSS 3.1 · 8.1 High EPSS 6.6% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 1 more
Products
Debian Linux Fedora Linux Kernel and 6 more
CVE-2020-25705

kernel: ICMP rate limiting can be used for DNS poisoning attack

A flaw in ICMP packets in the Linux kernel may allow an attacker to quickly scan open UDP ports. This flaw allows an off-path remote attacker to effectively bypass source port UDP randomization. Software that relies on UDP source port randomization are indirectly affected as well on the Linux Based Products (RUGGEDCOM RM1224: All versions between v5.0 and v6.4, SCALANCE M-800: All versions between v5.0 and v6.4, SCALANCE S615: All versions between v5.0 and v6.4, SCALANCE SC-600: All versions prior to v2.1.3, SCALANCE W1750D: v8.3.0.1, v8.6.0, and v8.7.0, SIMATIC Cloud Connect 7: All versions, SIMATIC MV500 Family: All versions, SIMATIC NET CP 1243-1 (incl. SIPLUS variants): Versions 3.1.39 and later, SIMATIC NET CP 1243-7 LTE EU: Version

CVSS 3.1 · 7.4 High EPSS 6.7% KEV · Not listed
Vendors
Linux Redhat
Products
Linux Kernel Enterprise Linux Rhel Aus and 4 more
CVE-2020-25704

kernel: perf_event_parse_addr_filter memory

A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Redhat and 1 more
Products
Debian Linux Linux Kernel Enterprise Linux and 6 more
CVE-2020-25656

kernel: use-after-free in read in vt_do_kdgkb_ioctl

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

CVSS 3.1 · 4.1 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Redhat and 1 more
Products
Debian Linux Linux Kernel Enterprise Linux and 2 more
CVE-2020-25645

kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints

A flaw was found in the Linux kernel in versions before 5.9-rc7. Traffic between two Geneve endpoints may be unencrypted when IPsec is configured to encrypt traffic for the specific UDP port used by the GENEVE tunnel allowing anyone between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

CVSS 3.1 · 7.5 High EPSS 2.4% KEV · Not listed
Vendors
Canonical Debian Linux and 3 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 7 more
CVE-2020-25643

kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow

A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 7.2 High EPSS 3.3% KEV · Not listed
Vendors
Debian Linux Netapp and 3 more
Products
Debian Linux Linux Kernel H410c and 5 more
CVE-2020-25212

kernel: TOCTOU mismatch in the NFS client code

A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Linux and 2 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 7 more
CVE-2020-25211

kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

CVSS 3.1 · 6.0 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 1 more
Products
Debian Linux Fedora Linux Kernel and 6 more
CVE-2020-24394

kernel: umask not applied on filesystem without ACL support

In the Linux kernel before 5.7.8, fs/nfsd/vfs.c (in the NFS server) can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support, aka CID-22cf8419f131. This occurs because the current umask is not considered.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Canonical Linux Opensuse and 3 more
Products
Ubuntu Linux Linux Kernel Leap and 8 more
CVE-2020-1749

kernel: some ipv6 protocols not encrypted over ipsec tunnel

A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

CVSS 3.1 · 7.5 High EPSS 1.1% KEV · Not listed
Vendors
Linux Redhat
Products
Linux Kernel Enterprise Linux Enterprise Mrg and 1 more
CVE-2020-14385

kernel: metadata validator in XFS may cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt

A flaw was found in the Linux kernel before 5.9-rc4. A failure of the file system metadata validator in XFS can cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt. This can lead to the filesystem being shutdown, or otherwise rendered inaccessible until it is remounted, leading to a denial of service. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Linux and 1 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 4 more
CVE-2020-14351

kernel: performance counters race condition use-after-free

A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Linux Redhat
Products
Debian Linux Linux Kernel Enterprise Linux and 5 more
CVE-2020-14331

kernel: kernel: buffer over write in vgacon_scroll

A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed
Vendors
Linux Redhat
Products
Linux Kernel Enterprise Linux Rhel Extras Rt
CVE-2020-14314

kernel: buffer uses out of index in ext3/4 filesystem

A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Linux and 2 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 3 more