CVE-2023-52698

Summary

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]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < 9a8f811a146aa2a0230f8edb2e9f4b6609aab8daaffected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < 36e19f84634aaa94f543fedc0a07588949638d53affected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < 44a88650ba55e6a7f2ec485d2c2413ba7e216f01affected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < a4529a08d3704c17ea9c7277d180e46b99250dedaffected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < 321b3a5592c8a9d6b654c7c64833ea67dbb33149affected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < 408bbd1e1746fe33e51f4c81c2febd7d3841d031affected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < f14d36e6e97fe935a20e0ceb159c100f90b6627caffected
LinuxLinuxcb72d38211eacda2dd90b09540542b6582da614e < ec4e9d630a64df500641892f4e259e8149594a99affected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux4.19.306 <= 4.19.*unaffected
LinuxLinux5.4.268 <= 5.4.*unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References