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Ubuntu Security Notice USN-6248-1
Ubuntu Security Notice 6248-1 - It was discovered that the network queuing discipline implementation in the Linux kernel contained a null pointer dereference in some situations. A local attacker could use this to cause a denial of service. It was discovered that a race condition existed in Adreno GPU DRM driver in the Linux kernel, leading to a double-free vulnerability. A local attacker could use this to cause a denial of service.
==========================================================================Ubuntu Security Notice USN-6248-1July 25, 2023linux-oem-6.0 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 22.04 LTSSummary:Several security issues were fixed in the Linux kernel.Software Description:- linux-oem-6.0: Linux kernel for OEM systemsDetails:It was discovered that the network queuing discipline implementation in theLinux kernel contained a null pointer dereference in some situations. Alocal attacker could use this to cause a denial of service (system crash).(CVE-2022-47929)It was discovered that a race condition existed in Adreno GPU DRM driver inthe Linux kernel, leading to a double-free vulnerability. A local attackercould use this to cause a denial of service (system crash).(CVE-2023-21106)Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFSimplementation in the Ubuntu Linux kernel did not properly performpermission checks in certain situations. A local attacker could possiblyuse this to gain elevated privileges. (CVE-2023-2640)Mingi Cho discovered that the netfilter subsystem in the Linux kernel didnot properly validate the status of a nft chain while performing a lookupby id, leading to a use-after-free vulnerability. An attacker could usethis to cause a denial of service (system crash) or possibly executearbitrary code. (CVE-2023-31248)Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation inthe Ubuntu Linux kernel did not properly perform permission checks incertain situations. A local attacker could possibly use this to gainelevated privileges. (CVE-2023-32629)Querijn Voet discovered that a race condition existed in the io_uringsubsystem in the Linux kernel, leading to a use-after-free vulnerability. Alocal attacker could use this to cause a denial of service (system crash)or possibly execute arbitrary code. (CVE-2023-3389)Tanguy Dubroca discovered that the netfilter subsystem in the Linux kerneldid not properly handle certain pointer data type, leading to an out-of-bounds write vulnerability. A privileged attacker could use this to cause adenial of service (system crash) or possibly execute arbitrary code.(CVE-2023-35001)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 22.04 LTS: linux-image-6.0.0-1020-oem 6.0.0-1020.20 linux-image-oem-22.04b 6.0.0.1020.20After a standard system update you need to reboot your computer to makeall the necessary changes.ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall all third party kernel modules you might have installed.Unless you manually uninstalled the standard kernel metapackages(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,linux-powerpc), a standard system upgrade will automatically performthis as well.References: https://ubuntu.com/security/notices/USN-6248-1 CVE-2022-47929, CVE-2023-21106, CVE-2023-2640, CVE-2023-31248, CVE-2023-32629, CVE-2023-3389, CVE-2023-35001Package Information: https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1020.20
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Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels
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