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In the Linux kernel, the following vulnerability has been resolved:
net: ipv4: fix memory leak in netlbl_cipsov4_add_std
Reported by syzkaller: BUG: memory leak unreferenced object 0xffff888105df7000 (size 64): comm "syz-executor842", pid 360, jiffies 4294824824 (age 22.546s) hex dump (first 32 bytes): 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 00 00 00 00 00 ................ backtrace: [<00000000e67ed558>] kmalloc include/linux/slab.h:590 [inline] [<00000000e67ed558>] kzalloc include/linux/slab.h:720 [inline] [<00000000e67ed558>] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [inline] [<00000000e67ed558>] netlbl_cipsov4_add+0x390/0x2340 net/netlabel/netlabel_cipso_v4.c:416 [<0000000006040154>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320 net/netlink/genetlink.c:739 [<00000000204d7a1c>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] [<00000000204d7a1c>] genl_rcv_msg+0x2bf/0x4f0 net/netlink/genetlink.c:800 [<00000000c0d6a995>] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504 [<00000000d78b9d2c>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 [<000000009733081b>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] [<000000009733081b>] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340 [<00000000d5fd43b8>] netlink_sendmsg+0x789/0xc70 net/netlink/af_netlink.c:1929 [<000000000a2d1e40>] sock_sendmsg_nosec net/socket.c:654 [inline] [<000000000a2d1e40>] sock_sendmsg+0x139/0x170 net/socket.c:674 [<00000000321d1969>] ____sys_sendmsg+0x658/0x7d0 net/socket.c:2350 [<00000000964e16bc>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404 [<000000001615e288>] __sys_sendmsg+0xd3/0x190 net/socket.c:2433 [<000000004ee8b6a5>] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:47 [<00000000171c7cee>] entry_SYSCALL_64_after_hwframe+0x44/0xae
The memory of doi_def->map.std pointing is allocated in netlbl_cipsov4_add_std, but no place has freed it. It should be freed in cipso_v4_doi_free which frees the cipso DOI resource.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade python-perfUpgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade perfUpgrade kernelUpgrade kernel-tools-develUpgrade kernel-livepatch-4.14.238-182.421 | May 21, 2025 | May 21, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | May 21, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernel-toolsUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel | Oct 8, 2024 | May 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 21, 2024 |
| Suse | — | Upgrade kernel-develUpgrade kernel-docsUpgrade kernel-default-baseUpgrade kernel-symsUpgrade kernel-default-develUpgrade kernel-defaultUpgrade kernel-macrosUpgrade kernel-obs-buildUpgrade kernel-devel-azureUpgrade kernel-syms-azureUpgrade kernel-azureUpgrade kernel-default-extraUpgrade kernel-azure-develUpgrade kernel-source-azureUpgrade kernel-sourceUpgrade kernel-azure-baseUpgrade kernel-default-man | Aug 9, 2024 | May 21, 2024 |
| Ubuntu | — | Upgrade linux-aws-fipsUpgrade linux-gcp-4.15Upgrade linux-azure-4.15Upgrade linux-kvmUpgrade linux-hweUpgrade linux-gkeopUpgrade linux-azure-5.4Upgrade linux-azureUpgrade linux-gcp-fipsUpgrade linux-gcp-5.4Upgrade linux-hwe-5.4Upgrade linux-oracleUpgrade linux-azure-fipsUpgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-raspi-5.4Upgrade linux-bluefieldUpgrade linux-aws-hweUpgrade linux-raspiUpgrade linux-gcpUpgrade linux-awsUpgrade linuxUpgrade linux-aws-5.4 | Nov 19, 2024 | May 21, 2024 |
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