CVE-2024-42271 — net/iucv: fix use after free in iucv_sock_close()

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

net/iucv: fix use after free in iucv_sock_close()

iucv_sever_path() is called from process context and from bh context. iucv->path is used as indicator whether somebody else is taking care of severing the path (or it is already removed / never existed). This needs to be done with atomic compare and swap, otherwise there is a small window where iucv_sock_close() will try to work with a path that has already been severed and freed by iucv_callback_connrej() called by iucv_tasklet_fn().

Example: [452744.123844] Call Trace: [452744.123845] ([<0000001e87f03880>] 0x1e87f03880) [452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138 [452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv] [452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv] [452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv] [452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8 [452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48 [452744.124820] [<00000000d5421642>] __fput+0xba/0x268 [452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0 [452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90 [452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8 [452744.125319] Last Breaking-Event-Address: [452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138 [452744.125324] [452744.125325] Kernel panic - not syncing: Fatal exception in inter…

USN-7069-1 — linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulner…

Affected: Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:Pro:16.04:LTS: linux-oracle, Ubuntu:Pro:18.04:LTS: linux, Ubuntu:Pro:18.04:LTS: linux-aws, Ubuntu:Pro:18.04:LTS: linux-azure-4.15, Ubuntu:Pro:18.04:LTS: linux-gcp-4.15, Ubuntu:Pro:18.04:LTS: linux-kvm, Ubuntu:Pro:18.04:LTS: linux-oracle

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - Cryptographic API; - CPU frequency scaling framework; - HW tracing; - ISDN/mISDN subsystem; - Media drivers; - Network drivers; - NVME drivers; - S/390 drivers; - SCSI drivers; - USB subsystem; - VFIO drivers; - Watchdog drivers; - JFS file system; - IRQ subsystem; - Core kernel; - Memory management; - Amateur Radio drivers; - IPv4 networking; - IPv6 networking; - IUCV driver; - Network traffic control; - TIPC protocol; - XFRM subsystem; - Integrity Measurement Architecture(IMA) framework; - SoC Audio for Freescale CPUs drivers; - USB sound devices; (CVE-2024-36971, CVE-2024-42271, CVE-2024-38630, CVE-2024-38602, CVE-2024-42223, CVE-2024-44940, CVE-2023-52528, CVE-2024-41097, CVE-2024-27051, CVE-2024-42157, CVE-2024-46673, CVE-2024-39494, CVE-2024-42089, CVE-2024-41073, CVE-2024-26810, CVE-2024-26960, CVE-2024-38611, CVE-2024-31076, CVE-2024-26754, CVE-2023-52510, CVE-2024-40941, CVE-2024-45016, CVE-2024-38627, CVE-2024-38621, CVE-2024-39487, CVE-2024-27436, CVE-2024-40901, CVE-2024-26812, CVE-2024-42244, CVE-2024-42229, CVE-2024-43858, CVE-2024-42280, CVE-2024-26641, CVE-2024-42284, CVE-2024-26602)

Most recent entries from all

CVE-2024-42271 — net/iucv: fix use after free in iucv_sock_close()

USN-7069-1 — linux, linux-aws, linux-aws-hwe, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle vulner…