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CVE-2024-26800

Status Candidate

Overview

In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.

Related Files

Ubuntu Security Notice USN-7123-1
Posted Nov 20, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7123-1 - It was discovered that the CIFS network file system implementation in the Linux kernel did not properly validate certain SMB messages, leading to an out-of-bounds read vulnerability. An attacker could use this to cause a denial of service or possibly expose sensitive information. Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and Shweta Shinde discovered that the Confidential Computing framework in the Linux kernel for x86 platforms did not properly handle 32-bit emulation on TDX and SEV. An attacker with access to the VMM could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, x86, kernel
systems | linux, ubuntu
advisories | CVE-2022-48666, CVE-2023-52757, CVE-2023-52889, CVE-2023-6610, CVE-2024-25744, CVE-2024-26661, CVE-2024-26669, CVE-2024-26800, CVE-2024-38577, CVE-2024-38602, CVE-2024-38611, CVE-2024-40915, CVE-2024-41011, CVE-2024-41012
SHA-256 | 0f33e2b0d9d4e9003aac62a268df3eec34205925efe7c3aefc683aecc1fe44d6
Ubuntu Security Notice USN-7100-1
Posted Nov 11, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 7100-1 - Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and Shweta Shinde discovered that the Confidential Computing framework in the Linux kernel for x86 platforms did not properly handle 32-bit emulation on TDX and SEV. An attacker with access to the VMM could use this to cause a denial of service or possibly execute arbitrary code. Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, denial of service, arbitrary, x86, kernel
systems | linux, ubuntu
advisories | CVE-2022-48666, CVE-2024-25744, CVE-2024-26607, CVE-2024-26800, CVE-2024-26893, CVE-2024-36484, CVE-2024-38577, CVE-2024-38602, CVE-2024-38611, CVE-2024-39472, CVE-2024-40915, CVE-2024-41012, CVE-2024-41015, CVE-2024-41020
SHA-256 | 149202c681713c94c011a6f610cf658675b27f1348643a377029ea858ada57be
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