In the Linux kernel, the following vulnerability has been resolved: can: bcm: Fix UAF in bcm_proc_show() BUG: KASAN: slab-use-after-free in bcm_proc_show+0x969/0xa80 Read of size 8 at addr ffff888155846230 by task cat/7862 CPU: 1 PID: 7862 Comm: cat Not tainted 6.5.0-rc1-00153-gc8746099c197 #230 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0xd5/0x150 print_report+0xc1/0x5e0 kasan_report+0xba/0xf0 bcm_proc_show+0x969/0xa80 seq_read_iter+0x4f6/0x1260 seq_read+0x165/0x210 proc_reg_read+0x227/0x300 vfs_read+0x1d5/0x8d0 ksys_read+0x11e/0x240 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Allocated by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x9e/0xa0 bcm_sendmsg+0x264b/0x44e0 sock_sendmsg+0xda/0x180 ____sys_sendmsg+0x735/0x920 ___sys_sendmsg+0x11d/0x1b0 __sys_sendmsg+0xfa/0x1d0 do_syscall_64+0x35/0xb0 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7846: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x27/0x40 ____kasan_slab_free+0x161/0x1c0 slab_free_freelist_hook+0x119/0x220 __kmem_cache_free+0xb4/0x2e0 rcu_core+0x809/0x1bd0 bcm_op is freed before procfs entry be removed in bcm_release(), this lead to bcm_proc_show() may read the freed bcm_op.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024112856-CVE-2023-52922-39e1@gregkh/T
It's fairly easy to replicate on a debug kernel with a "vcan" device and something that creates and destroys "broadcast manager" (BCM) sockets. I've pulled a few different things together into https://gitlab.com/iwienand/cve-2023-52922 for a simple test & replicator
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2025:2488 https://access.redhat.com/errata/RHSA-2025:2488
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat Enterprise Linux 8.6 Telecommunications Update Service Via RHSA-2025:2489 https://access.redhat.com/errata/RHSA-2025:2489
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2025:2490 https://access.redhat.com/errata/RHSA-2025:2490
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2025:2501 https://access.redhat.com/errata/RHSA-2025:2501
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2025:2510 https://access.redhat.com/errata/RHSA-2025:2510
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2025:2512 https://access.redhat.com/errata/RHSA-2025:2512
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Advanced Update Support Via RHSA-2025:2514 https://access.redhat.com/errata/RHSA-2025:2514
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION Via RHSA-2025:2517 https://access.redhat.com/errata/RHSA-2025:2517
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Telecommunications Update Service Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Via RHSA-2025:2524 https://access.redhat.com/errata/RHSA-2025:2524
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2025:2525 https://access.redhat.com/errata/RHSA-2025:2525
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Telecommunications Update Service Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Via RHSA-2025:2528 https://access.redhat.com/errata/RHSA-2025:2528
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:2627 https://access.redhat.com/errata/RHSA-2025:2627
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Via RHSA-2025:2646 https://access.redhat.com/errata/RHSA-2025:2646
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2025:3024 https://access.redhat.com/errata/RHSA-2025:3024
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:3027 https://access.redhat.com/errata/RHSA-2025:3027
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2025:3025 https://access.redhat.com/errata/RHSA-2025:3025
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:3026 https://access.redhat.com/errata/RHSA-2025:3026
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:3048 https://access.redhat.com/errata/RHSA-2025:3048
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:3049 https://access.redhat.com/errata/RHSA-2025:3049
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Via RHSA-2025:3093 https://access.redhat.com/errata/RHSA-2025:3093
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Via RHSA-2025:3095 https://access.redhat.com/errata/RHSA-2025:3095
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2025:3096 https://access.redhat.com/errata/RHSA-2025:3096
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2025:3094 https://access.redhat.com/errata/RHSA-2025:3094
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2025:3097 https://access.redhat.com/errata/RHSA-2025:3097
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2025:3112 https://access.redhat.com/errata/RHSA-2025:3112