Ubuntu: (Multiple Advisories) (CVE-2023-52698): Linux kernel vulnerabilities

Ubuntu: (Multiple Advisories) (CVE-2023-52698): Linux kernel vulnerabilities

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

05/17/2024

Created

06/27/2024

Added

06/26/2024

Modified

01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: calipso: fix memory leak in netlbl_calipso_add_pass() If IPv6 support is disabled at boot (ipv6.disable=1), the calipso_init() -> netlbl_calipso_ops_register() function isn't called, and the netlbl_calipso_ops_get() function always returns NULL. In this case, the netlbl_calipso_add_pass() function allocates memory for the doi_def variable but doesn't free it with the calipso_doi_free(). BUG: memory leak unreferenced object 0xffff888011d68180 (size 64): comm "syz-executor.1", pid 10746, jiffies 4295410986 (age 17.928s) hex dump (first 32 bytes): 00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00................ backtrace: [<...>] kmalloc include/linux/slab.h:552 [inline] [<...>] netlbl_calipso_add_pass net/netlabel/netlabel_calipso.c:76 [inline] [<...>] netlbl_calipso_add+0x22e/0x4f0 net/netlabel/netlabel_calipso.c:111 [<...>] genl_family_rcv_msg_doit+0x22f/0x330 net/netlink/genetlink.c:739 [<...>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [<...>] genl_rcv_msg+0x341/0x5a0 net/netlink/genetlink.c:800 [<...>] netlink_rcv_skb+0x14d/0x440 net/netlink/af_netlink.c:2515 [<...>] genl_rcv+0x29/0x40 net/netlink/genetlink.c:811 [<...>] netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] [<...>] netlink_unicast+0x54b/0x800 net/netlink/af_netlink.c:1339 [<...>] netlink_sendmsg+0x90a/0xdf0 net/netlink/af_netlink.c:1934 [<...>] sock_sendmsg_nosec net/socket.c:651 [inline] [<...>] sock_sendmsg+0x157/0x190 net/socket.c:671 [<...>] ____sys_sendmsg+0x712/0x870 net/socket.c:2342 [<...>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2396 [<...>] __sys_sendmsg+0xea/0x1b0 net/socket.c:2429 [<...>] do_syscall_64+0x30/0x40 arch/x86/entry/common.c:46 [<...>] entry_SYSCALL_64_after_hwframe+0x61/0xc6 Found by InfoTeCS on behalf of Linux Verification Center (linuxtesting.org) with Syzkaller [PM: merged via the LSM tree at Jakub Kicinski request]

Solution(s)

• ubuntu-upgrade-linux-image-6-5-0-1015-starfive
• ubuntu-upgrade-linux-image-6-5-0-1017-laptop
• ubuntu-upgrade-linux-image-6-5-0-1018-raspi
• ubuntu-upgrade-linux-image-6-5-0-1021-aws
• ubuntu-upgrade-linux-image-6-5-0-1021-nvidia
• ubuntu-upgrade-linux-image-6-5-0-1021-nvidia-64k
• ubuntu-upgrade-linux-image-6-5-0-1022-azure
• ubuntu-upgrade-linux-image-6-5-0-1022-azure-fde
• ubuntu-upgrade-linux-image-6-5-0-1022-gcp
• ubuntu-upgrade-linux-image-6-5-0-1024-oem
• ubuntu-upgrade-linux-image-6-5-0-1024-oracle
• ubuntu-upgrade-linux-image-6-5-0-1024-oracle-64k
• ubuntu-upgrade-linux-image-6-5-0-41-generic
• ubuntu-upgrade-linux-image-6-5-0-41-generic-64k
• ubuntu-upgrade-linux-image-6-5-0-41-lowlatency
• ubuntu-upgrade-linux-image-6-5-0-41-lowlatency-64k
• ubuntu-upgrade-linux-image-aws
• ubuntu-upgrade-linux-image-azure
• ubuntu-upgrade-linux-image-azure-fde
• ubuntu-upgrade-linux-image-gcp
• ubuntu-upgrade-linux-image-generic
• ubuntu-upgrade-linux-image-generic-64k
• ubuntu-upgrade-linux-image-generic-64k-hwe-22-04
• ubuntu-upgrade-linux-image-generic-hwe-22-04
• ubuntu-upgrade-linux-image-generic-lpae
• ubuntu-upgrade-linux-image-kvm
• ubuntu-upgrade-linux-image-laptop-23-10
• ubuntu-upgrade-linux-image-lowlatency
• ubuntu-upgrade-linux-image-lowlatency-64k
• ubuntu-upgrade-linux-image-lowlatency-64k-hwe-22-04
• ubuntu-upgrade-linux-image-lowlatency-hwe-22-04
• ubuntu-upgrade-linux-image-nvidia-6-5
• ubuntu-upgrade-linux-image-nvidia-64k-6-5
• ubuntu-upgrade-linux-image-nvidia-64k-hwe-22-04
• ubuntu-upgrade-linux-image-nvidia-hwe-22-04
• ubuntu-upgrade-linux-image-oem-22-04
• ubuntu-upgrade-linux-image-oem-22-04a
• ubuntu-upgrade-linux-image-oem-22-04b
• ubuntu-upgrade-linux-image-oem-22-04c
• ubuntu-upgrade-linux-image-oem-22-04d
• ubuntu-upgrade-linux-image-oracle
• ubuntu-upgrade-linux-image-oracle-64k
• ubuntu-upgrade-linux-image-raspi
• ubuntu-upgrade-linux-image-raspi-nolpae
• ubuntu-upgrade-linux-image-starfive
• ubuntu-upgrade-linux-image-virtual
• ubuntu-upgrade-linux-image-virtual-hwe-22-04

References

• https://attackerkb.com/topics/cve-2023-52698
• CVE - 2023-52698
• USN-6818-1
• USN-6818-2
• USN-6818-3
• USN-6818-4
• USN-6819-1
• USN-6819-2
• USN-6819-3
• USN-6819-4

View more