CVE-2022-49878— bpf, verifier: Fix memory leak in array reallocation for stack state
Affected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c69431aab67a912836e5831f03d99a819c14c9c3< 06615967d4889b08b19ff3dda96e8b131282f73d | affected |
c69431aab67a912836e5831f03d99a819c14c9c3< 3e210891c4a4c2d858cd6f9f61d5809af251d4df | affected | ||
c69431aab67a912836e5831f03d99a819c14c9c3< 42378a9ca55347102bbf86708776061d8fe3ece2 | affected | ||
5.14 | affected | ||
< 5.14 | unaffected | ||
5.15.79≤ 5.15.* | unaffected | ||
6.0.9≤ 6.0.* | unaffected | ||
6.1≤ * | unaffected |
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I. Basic Information for CVE-2022-49878
Vulnerability Information
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Vulnerability Title
bpf, verifier: Fix memory leak in array reallocation for stack state
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf, verifier: Fix memory leak in array reallocation for stack state If an error (NULL) is returned by krealloc(), callers of realloc_array() were setting their allocation pointers to NULL, but on error krealloc() does not touch the original allocation. This would result in a memory resource leak. Instead, free the old allocation on the error handling path. The memory leak information is as follows as also reported by Zhengchao: unreferenced object 0xffff888019801800 (size 256): comm "bpf_repo", pid 6490, jiffies 4294959200 (age 17.170s) 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: [<00000000b211474b>] __kmalloc_node_track_caller+0x45/0xc0 [<0000000086712a0b>] krealloc+0x83/0xd0 [<00000000139aab02>] realloc_array+0x82/0xe2 [<00000000b1ca41d1>] grow_stack_state+0xfb/0x186 [<00000000cd6f36d2>] check_mem_access.cold+0x141/0x1341 [<0000000081780455>] do_check_common+0x5358/0xb350 [<0000000015f6b091>] bpf_check.cold+0xc3/0x29d [<000000002973c690>] bpf_prog_load+0x13db/0x2240 [<00000000028d1644>] __sys_bpf+0x1605/0x4ce0 [<00000000053f29bd>] __x64_sys_bpf+0x75/0xb0 [<0000000056fedaf5>] do_syscall_64+0x35/0x80 [<000000002bd58261>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于realloc_array未正确处理krealloc失败情况，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2022-49878
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|---|
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Patches & Fixes for CVE-2022-49878 (3)
Same Patch Batch · Linux · 2025-05-01 · 245 CVEs total
| CVE-2022-49852 | riscv: process: fix kernel info leakage | |
| CVE-2022-49836 | siox: fix possible memory leak in siox_device_add() | |
| CVE-2022-49837 | bpf: Fix memory leaks in __check_func_call | |
| CVE-2022-49838 | sctp: clear out_curr if all frag chunks of current msg are pruned | |
| CVE-2022-49840 | bpf, test_run: Fix alignment problem in bpf_prog_test_run_skb() | |
| CVE-2022-49839 | scsi: scsi_transport_sas: Fix error handling in sas_phy_add() | |
| CVE-2022-49841 | serial: imx: Add missing .thaw_noirq hook | |
| CVE-2022-49842 | ASoC: core: Fix use-after-free in snd_soc_exit() | |
| CVE-2022-49844 | can: dev: fix skb drop check | |
| CVE-2022-49845 | can: j1939: j1939_send_one(): fix missing CAN header initialization | |
| CVE-2022-49846 | udf: Fix a slab-out-of-bounds write bug in udf_find_entry() | |
| CVE-2022-49847 | net: ethernet: ti: am65-cpsw: Fix segmentation fault at module unload | |
| CVE-2022-49849 | btrfs: fix match incorrectly in dev_args_match_device | |
| CVE-2022-49848 | phy: qcom-qmp-combo: fix NULL-deref on runtime resume | |
| CVE-2022-49850 | nilfs2: fix deadlock in nilfs_count_free_blocks() | |
| CVE-2022-49851 | riscv: fix reserved memory setup | |
| CVE-2022-49863 | can: af_can: fix NULL pointer dereference in can_rx_register() | |
| CVE-2022-49862 | tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header | |
| CVE-2022-49864 | drm/amdkfd: Fix NULL pointer dereference in svm_migrate_to_ram() | |
| CVE-2022-49861 | dmaengine: mv_xor_v2: Fix a resource leak in mv_xor_v2_remove() |
Showing top 20 of 245 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
Same vendor: Linux
- CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans - CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects
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