CVE-2023-52698 calipso: fix memory leak in netlbl_calipso_add_pass()

2024-05-1714:27:29

Linux

www.cve.org

linux kernel vulnerability

calipso

memory leak

netlbl_calipso_add_pass

cve-2023-52698

infotecs

linux verification center

7.5 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.0%

JSON

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]

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netlabel/netlabel_calipso.c"
    ],
    "versions": [
      {
        "version": "cb72d38211ea",
        "lessThan": "9a8f811a146a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "36e19f84634a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "44a88650ba55",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "a4529a08d370",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "321b3a5592c8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "408bbd1e1746",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "f14d36e6e97f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "cb72d38211ea",
        "lessThan": "ec4e9d630a64",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netlabel/netlabel_calipso.c"
    ],
    "versions": [
      {
        "version": "4.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.306",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.268",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.209",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.148",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.75",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.14",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.2",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]