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CVE-2021-28375

Status Candidate

Overview

An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka CID-20c40794eb85. This is a related issue to CVE-2019-2308.

Related Files

Ubuntu Security Notice USN-4945-2
Posted May 19, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4945-2 - USN-4945-1 fixed vulnerabilities in the Linux kernel for Ubuntu 20.04 LTS and Ubuntu 18.04 LTS. This update provides the corresponding Linux kernel updates targeted specifically for Raspberry Pi devices in those same Ubuntu Releases. It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28660, CVE-2021-29265, CVE-2021-29650, CVE-2021-30002
SHA-256 | b7d2e192331fc5eeec68d356aef0b7b1f58186fdabc93af9473f0e7868618fd2
Ubuntu Security Notice USN-4949-1
Posted May 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4949-1 - 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 or execute arbitrary code. 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 or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-26930, CVE-2021-26931, CVE-2021-28375, CVE-2021-29264, CVE-2021-29265, CVE-2021-29266, CVE-2021-29646, CVE-2021-29650, CVE-2021-3489, CVE-2021-3490, CVE-2021-3491
SHA-256 | 76d964fe9c27085f6742f1876c549a9562042eb085a4203978ffafc9d5a92ddc
Ubuntu Security Notice USN-4947-1
Posted May 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4947-1 - Kiyin discovered that the x25 implementation in the Linux kernel contained overflows when handling addresses from user space. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the fastrpc driver in the Linux kernel did not prevent user space applications from sending kernel RPC messages. A local attacker could possibly use this to gain elevated privileges. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-35519, CVE-2021-28375, CVE-2021-29646, CVE-2021-29650, CVE-2021-30002
SHA-256 | 0f3c9901fe7cb2bad1e41c261c51e0aa55d62c3d6c70d8302e4c8c01946ccb92
Ubuntu Security Notice USN-4945-1
Posted May 12, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4945-1 - It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28660, CVE-2021-29265, CVE-2021-29650, CVE-2021-30002
SHA-256 | 5a76cc7c1c429c2a4eb7effc9105b11c6e36caf111681662c6bd8c168d7e4181
Ubuntu Security Notice USN-4911-1
Posted Apr 13, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4911-1 - It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions in some situations. A local attacker could use this to cause a denial of service. Jan Beulich discovered that the Xen netback backend in the Linux kernel did not properly handle certain error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25639, CVE-2021-28038, CVE-2021-28375, CVE-2021-28950
SHA-256 | 8336eec26b1ad2dee9cca3cab244616269d1178541a9747ac362e10bfbac9d8c
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