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CVE-2021-4159

Status Candidate

Overview

A vulnerability was found in the Linux kernel's EBPF verifier when handling internal data structures. Internal memory locations could be returned to userspace. A local attacker with the permissions to insert eBPF code to the kernel can use this to leak internal kernel memory details defeating some of the exploit mitigations in place for the kernel.

Related Files

Ubuntu Security Notice USN-5790-1
Posted Jan 9, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5790-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that a race condition existed in the Android Binder IPC subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-4159, CVE-2022-20421, CVE-2022-3061, CVE-2022-3586, CVE-2022-39188, CVE-2022-40307, CVE-2022-4095
SHA-256 | 1d9560d5aef2cc859cd9a37a38fc80172a6ac7361f6977f86ca4cee9c00d13a5
Ubuntu Security Notice USN-5706-1
Posted Oct 28, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5706-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-4159, CVE-2022-20369, CVE-2022-2318, CVE-2022-26365, CVE-2022-26373, CVE-2022-3176, CVE-2022-33740, CVE-2022-33742, CVE-2022-33744, CVE-2022-36879
SHA-256 | 7aaa31ceef76ec8bdfbe0b205ddec2f0fbf8452e3b09e76f3ff397adbff1ccef
Ubuntu Security Notice USN-5682-1
Posted Oct 17, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5682-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-4159, CVE-2022-20369, CVE-2022-2318, CVE-2022-26365, CVE-2022-26373, CVE-2022-3176, CVE-2022-33740, CVE-2022-33742, CVE-2022-33744, CVE-2022-36879
SHA-256 | 290d766370dff052f65510abe2bf8c1d9c4f1ae1e64f9589a9ec5f7dbb24a319
Ubuntu Security Notice USN-5677-1
Posted Oct 17, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5677-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-4159, CVE-2022-20369, CVE-2022-2318, CVE-2022-26365, CVE-2022-26373, CVE-2022-3176, CVE-2022-33740, CVE-2022-33742, CVE-2022-33744, CVE-2022-36879
SHA-256 | e2097990121803abdb83158d31fa16df3ba989a051c33b0cb6a47ce4a369c82a
Ubuntu Security Notice USN-5668-1
Posted Oct 11, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5668-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-4159, CVE-2022-20369, CVE-2022-2318, CVE-2022-26365, CVE-2022-26373, CVE-2022-3176, CVE-2022-33740, CVE-2022-33742, CVE-2022-33744, CVE-2022-36879
SHA-256 | aea4081e796ea4318e67523ffea3d182af837e95e646bf0b90c845b1763c2f0d
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