Summary
Ryota Shiga discovered that the eBPF implementation in the Linux kernel did
not properly verify that a BPF program only reserved as much memory for a
ring buffer as was allocated. A local attacker could use this to cause a
denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)
Manfred Paul discovered that the eBPF implementation in the Linux kernel
did not properly track bounds on bitwise operations. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2021-3490)
Billy Jheng Bing-Jhong discovered that the io_uring implementation of the
Linux kernel did not properly enforce the MAX_RW_COUNT limit in some
situations. A local attacker could use this to cause a denial of service
(system crash) or execute arbitrary code. (CVE-2021-3491)
Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the
Linux kernel contained a reference counting error. A local attacker could
use this to cause a denial of service (system crash). (CVE-2020-25670)
Kiyin (尹亮) discovered that the NFC LLCP protocol implementation in the
Linux kernel did not properly deallocate memory in certain error
situations. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2020-25671, CVE-2020-25672)
It was discovered that the Xen paravirtualization backend in the Linux
kernel did not properly deallocate memory in some situations. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2021-28688)
It was discovered that the io_uring subsystem in the Linux kernel contained
a race condition leading to a deadlock condition. A local attacker could
use this to cause a denial of service. (CVE-2021-28951)
John Stultz discovered that the audio driver for Qualcomm SDM845 systems in
the Linux kernel did not properly validate port ID numbers. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-28952)
Zygo Blaxell discovered that the btrfs file system implementation in the
Linux kernel contained a race condition during certain cloning operations.
A local attacker could possibly use this to cause a denial of service
(system crash). (CVE-2021-28964)
Vince Weaver discovered that the perf subsystem in the Linux kernel did
not properly handle certain PEBS records properly for some Intel Haswell
processors. A local attacker could use this to cause a denial of service
(system crash). (CVE-2021-28971)
It was discovered that the RPA PCI Hotplug driver implementation in the
Linux kernel did not properly handle device name writes via sysfs, leading
to a buffer overflow. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2021-28972)
It was discovered that the Freescale Gianfar Ethernet driver for the Linux
kernel did not properly handle receive queue overrun when jumbo frames were
enabled in some situations. An attacker could use this to cause a denial of
service (system crash). (CVE-2021-29264)
It was discovered that the vDPA backend virtio driver in the Linux kernel
contained a use-after-free vulnerability. An attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2021-29266)
It was discovered that the TIPC protocol implementation in the Linux kernel
did not properly validate passed encryption key sizes. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2021-29646)
It was discovered that the Qualcomm IPC router implementation in the Linux
kernel did not properly initialize memory passed to user space. A local
attacker could use this to expose sensitive information (kernel memory).
(CVE-2021-29647)
It was discovered that the BPF user mode driver implementation in the Linux
kernel did not properly deallocate memory in some situations. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2021-29649)
It was discovered that a race condition existed in the netfilter subsystem
of the Linux kernel when replacing tables. A local attacker could use this
to cause a denial of service (system crash). (CVE-2021-29650)
Felix Wilhelm discovered that the KVM implementation in the Linux kernel
for AMD processors contained race conditions on nested VMCB controls. A
local attacker in a guest vm could possibly use this to gain elevated
privileges. (CVE-2021-29657)
Dan Carpenter discovered that the block device manager (dm) implementation
in the Linux kernel contained a buffer overflow in the ioctl for listing
devices. A privileged local attacker could use this to cause a denial of
service (system crash). (CVE-2021-31916)
马哲宇 discovered that the IEEE 1394 (Firewire) nosy packet sniffer
driver in the Linux kernel did not properly perform reference counting in
some situations, leading to a use-after-free vulnerability. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-3483)
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | linux-oem-5.10 | 5.10.0-1026.27 |
Vulnerabilities 21
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High 7.8
Linux kernel eBPF RINGBUF map oversized allocation
The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This i…
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High 7.8
Linux kernel eBPF bitwise ops ALU32 bounds tracking
The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was f…
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High 7.8
Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass
The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to a…
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Unscored —
A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free which might le…
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Unscored —
A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which mi…
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Unscored —
A memory leak vulnerability was found in Linux kernel in llcp_sock_connect
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Unscored —
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or…
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Unscored —
An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of s…
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Unscored —
An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device driver has a b…
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Unscored —
A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It allows attac…
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Unscored —
In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some Haswell CPUs, user…
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Unscored —
In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has a user-toler…
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Unscored —
An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in the Freescale …
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Unscored —
An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_…
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Unscored —
An issue was discovered in the Linux kernel before 5.11.11. tipc_nl_retrieve_key in net/tipc/node.c does not properly v…
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Unscored —
An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows attackers to obtain …
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Unscored —
An issue was discovered in the Linux kernel before 5.11.11. The user mode driver (UMD) has a copy_process() memory leak…
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Unscored —
An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to cause a denial …
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Unscored —
arch/x86/kvm/svm/nested.c in the Linux kernel before 5.11.12 has a use-after-free in which an AMD KVM guest can bypass …
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Unscored —
An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver …
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Unscored —
A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-…
References
-
report
https://ubuntu.com/security/CVE-2020-25670
-
report
https://ubuntu.com/security/CVE-2020-25671
-
report
https://ubuntu.com/security/CVE-2020-25672
-
report
https://ubuntu.com/security/CVE-2021-3483
-
report
https://ubuntu.com/security/CVE-2021-3489
-
report
https://ubuntu.com/security/CVE-2021-3490
-
report
https://ubuntu.com/security/CVE-2021-3491
-
report
https://ubuntu.com/security/CVE-2021-28688
-
report
https://ubuntu.com/security/CVE-2021-28951
-
report
https://ubuntu.com/security/CVE-2021-28952
-
report
https://ubuntu.com/security/CVE-2021-28964
-
report
https://ubuntu.com/security/CVE-2021-28971
-
report
https://ubuntu.com/security/CVE-2021-28972
-
report
https://ubuntu.com/security/CVE-2021-29264
-
report
https://ubuntu.com/security/CVE-2021-29266
-
report
https://ubuntu.com/security/CVE-2021-29646
-
report
https://ubuntu.com/security/CVE-2021-29647
-
report
https://ubuntu.com/security/CVE-2021-29649
-
report
https://ubuntu.com/security/CVE-2021-29650
-
report
https://ubuntu.com/security/CVE-2021-29657
-
report
https://ubuntu.com/security/CVE-2021-31916