cbcvebase.
CVE-2022-49871
published 2025-05-01

CVE-2022-49871: In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix memory leaks of napi_get_frags kmemleak reports after running test_progs…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
10.6th percentile
In the Linux kernel, the following vulnerability has been resolved: net: tun: Fix memory leaks of napi_get_frags kmemleak reports after running test_progs: unreferenced object 0xffff8881b1672dc0 (size 232): comm "test_progs", pid 394388, jiffies 4354712116 (age 841.975s) hex dump (first 32 bytes): e0 84 d7 a8 81 88 ff ff 80 2c 67 b1 81 88 ff ff .........,g..... 00 40 c5 9b 81 88 ff ff 00 00 00 00 00 00 00 00 .@.............. backtrace: [] napi_skb_cache_get+0xd4/0x150 [] __napi_build_skb+0x15/0x50 [] __napi_alloc_skb+0x26e/0x540 [] napi_get_frags+0x59/0x140 [] tun_get_user+0x183d/0x3bb0 [tun] [] tun_chr_write_iter+0xc0/0x1b1 [tun] [] do_iter_readv_writev+0x19f/0x320 [] do_iter_write+0x135/0x630 [] vfs_writev+0x12e/0x440 [] do_writev+0x104/0x280 [] do_syscall_64+0x3b/0x90 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd The issue occurs in the following scenarios: tun_get_user() napi_gro_frags() napi_frags_finish() case GRO_NORMAL: gro_normal_one() list_add_tail(&skb->list, &napi->rx_list); rx_count rx_list is not empty rx_list is not empty, which caused memory leaks To fix, add napi_complete() after napi_gro_frags().

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.10-1 (bookworm)linux 6.0.10-1 (bookworm)
linuxlinux——
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < 223ef6a94e52331a6a7ef31e59921e0e82d2d40a223ef6a94e52331a6a7ef31e59921e0e82d2d40a
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < a4f73f6adc53fd7a3f9771cbc89a03ef39b0b755a4f73f6adc53fd7a3f9771cbc89a03ef39b0b755
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < 3401f964028ac941425b9b2c8ff8a022539ef44a3401f964028ac941425b9b2c8ff8a022539ef44a
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < d7569302a7a52a9305d2fb054df908ff985553bbd7569302a7a52a9305d2fb054df908ff985553bb
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < 8b12a020b20a78f62bedc50f26db3bf4fadf8cb98b12a020b20a78f62bedc50f26db3bf4fadf8cb9
linuxlinux>= 90e33d45940793def6f773b2d528e9f3c84ffdc7 < 1118b2049d77ca0b505775fc1a8d1909cf19a7ec1118b2049d77ca0b505775fc1a8d1909cf19a7ec
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.158-15.10.158-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 0 < 6.0.10-16.0.10-1
linuxlinux_kernel>= 4.15 < 4.19.2674.19.267
linuxlinux_kernel>= 4.20 < 5.4.2255.4.225
linuxlinux_kernel>= 5.11 < 5.15.795.15.79
linuxlinux_kernel>= 5.16 < 6.0.96.0.9
linuxlinux_kernel>= 5.5 < 5.10.1555.10.155

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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