Vulnerabilities > Improper Release of Memory Before Removing Last Reference ('Memory Leak')
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2024-06-19 | CVE-2021-47585 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory leak in __add_inode_ref() Line 1169 (#3) allocates a memory chunk for victim_name by kmalloc(), but when the function returns in line 1184 (#4) victim_name allocated by line 1169 (#3) is not freed, which will lead to a memory leak. There is a similar snippet of code in this function as allocating a memory chunk for victim_name in line 1104 (#1) as well as releasing the memory in line 1116 (#2). We should kfree() victim_name when the return value of backref_in_log() is less than zero and before the function returns in line 1184 (#4). 1057 static inline int __add_inode_ref(struct btrfs_trans_handle *trans, 1058 struct btrfs_root *root, 1059 struct btrfs_path *path, 1060 struct btrfs_root *log_root, 1061 struct btrfs_inode *dir, 1062 struct btrfs_inode *inode, 1063 u64 inode_objectid, u64 parent_objectid, 1064 u64 ref_index, char *name, int namelen, 1065 int *search_done) 1066 { 1104 victim_name = kmalloc(victim_name_len, GFP_NOFS); // #1: kmalloc (victim_name-1) 1105 if (!victim_name) 1106 return -ENOMEM; 1112 ret = backref_in_log(log_root, &search_key, 1113 parent_objectid, victim_name, 1114 victim_name_len); 1115 if (ret < 0) { 1116 kfree(victim_name); // #2: kfree (victim_name-1) 1117 return ret; 1118 } else if (!ret) { 1169 victim_name = kmalloc(victim_name_len, GFP_NOFS); // #3: kmalloc (victim_name-2) 1170 if (!victim_name) 1171 return -ENOMEM; 1180 ret = backref_in_log(log_root, &search_key, 1181 parent_objectid, victim_name, 1182 victim_name_len); 1183 if (ret < 0) { 1184 return ret; // #4: missing kfree (victim_name-2) 1185 } else if (!ret) { 1241 return 0; 1242 } | 5.5 |
| 2024-06-19 | CVE-2024-38539 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Fix kmemleak in rdma_core observed during blktests nvme/rdma use siw When running blktests nvme/rdma, the following kmemleak issue will appear. kmemleak: Kernel memory leak detector initialized (mempool available:36041) kmemleak: Automatic memory scanning thread started kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) kmemleak: 8 new suspected memory leaks (see /sys/kernel/debug/kmemleak) kmemleak: 17 new suspected memory leaks (see /sys/kernel/debug/kmemleak) kmemleak: 4 new suspected memory leaks (see /sys/kernel/debug/kmemleak) unreferenced object 0xffff88855da53400 (size 192): comm "rdma", pid 10630, jiffies 4296575922 hex dump (first 32 bytes): 37 00 00 00 00 00 00 00 c0 ff ff ff 1f 00 00 00 7............... 10 34 a5 5d 85 88 ff ff 10 34 a5 5d 85 88 ff ff .4.].....4.].... backtrace (crc 47f66721): [<ffffffff911251bd>] kmalloc_trace+0x30d/0x3b0 [<ffffffffc2640ff7>] alloc_gid_entry+0x47/0x380 [ib_core] [<ffffffffc2642206>] add_modify_gid+0x166/0x930 [ib_core] [<ffffffffc2643468>] ib_cache_update.part.0+0x6d8/0x910 [ib_core] [<ffffffffc2644e1a>] ib_cache_setup_one+0x24a/0x350 [ib_core] [<ffffffffc263949e>] ib_register_device+0x9e/0x3a0 [ib_core] [<ffffffffc2a3d389>] 0xffffffffc2a3d389 [<ffffffffc2688cd8>] nldev_newlink+0x2b8/0x520 [ib_core] [<ffffffffc2645fe3>] rdma_nl_rcv_msg+0x2c3/0x520 [ib_core] [<ffffffffc264648c>] rdma_nl_rcv_skb.constprop.0.isra.0+0x23c/0x3a0 [ib_core] [<ffffffff9270e7b5>] netlink_unicast+0x445/0x710 [<ffffffff9270f1f1>] netlink_sendmsg+0x761/0xc40 [<ffffffff9249db29>] __sys_sendto+0x3a9/0x420 [<ffffffff9249dc8c>] __x64_sys_sendto+0xdc/0x1b0 [<ffffffff92db0ad3>] do_syscall_64+0x93/0x180 [<ffffffff92e00126>] entry_SYSCALL_64_after_hwframe+0x71/0x79 The root cause: rdma_put_gid_attr is not called when sgid_attr is set to ERR_PTR(-ENODEV). | 5.5 |
| 2024-06-19 | CVE-2024-38563 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: fix potential memory leakage when reading chip temperature Without this commit, reading chip temperature will cause memory leakage. | 5.5 |
| 2024-06-19 | CVE-2024-38603 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: drivers/perf: hisi: hns3: Actually use devm_add_action_or_reset() pci_alloc_irq_vectors() allocates an irq vector. | 5.5 |
| 2024-06-08 | CVE-2024-36967 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix memory leak in tpm2_key_encode() 'scratch' is never freed. | 5.5 |
| 2024-05-24 | CVE-2021-47513 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: net: dsa: felix: Fix memory leak in felix_setup_mmio_filtering Avoid a memory leak if there is not a CPU port defined. Addresses-Coverity-ID: 1492897 ("Resource leak") Addresses-Coverity-ID: 1492899 ("Resource leak") | 5.5 |
| 2024-05-24 | CVE-2021-47516 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: nfp: Fix memory leak in nfp_cpp_area_cache_add() In line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a CPP area structure. | 5.5 |
| 2024-05-24 | CVE-2021-47519 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: can: m_can: m_can_read_fifo: fix memory leak in error branch In m_can_read_fifo(), if the second call to m_can_fifo_read() fails, the function jump to the out_fail label and returns without calling m_can_receive_skb(). | 5.5 |
| 2024-05-24 | CVE-2021-47529 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: iwlwifi: Fix memory leaks in error handling path Should an error occur (invalid TLV len or memory allocation failure), the memory already allocated in 'reduce_power_data' should be freed before returning, otherwise it is leaking. | 5.5 |
| 2024-05-24 | CVE-2021-47537 | Memory Leak vulnerability in Linux Kernel In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix a memleak bug in rvu_mbox_init() In rvu_mbox_init(), mbox_regions is not freed or passed out under the switch-default region, which could lead to a memory leak. Fix this bug by changing 'return err' to 'goto free_regions'. This bug was found by a static analyzer. | 5.5 |