{"cve":"CVE-2022-50817","nvd":{"published":"2025-12-30T13:15:56.087","modified":"2026-06-17T05:24:14.413","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: avoid possible NULL deref in skb_clone()\n\nsyzbot got a crash [1] in skb_clone(), caused by a bug\nin hsr_get_untagged_frame().\n\nWhen/if create_stripped_skb_hsr() returns NULL, we must\nnot attempt to call skb_clone().\n\nWhile we are at it, replace a WARN_ONCE() by netdev_warn_once().\n\n[1]\ngeneral protection fault, probably for non-canonical address 0xdffffc000000000f: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000078-0x000000000000007f]\nCPU: 1 PID: 754 Comm: syz-executor.0 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\nRIP: 0010:skb_clone+0x108/0x3c0 net/core/skbuff.c:1641\nCode: 93 02 00 00 49 83 7c 24 28 00 0f 85 e9 00 00 00 e8 5d 4a 29 fa 4c 8d 75 7e 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 04 02 4c 89 f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 9e 01 00 00\nRSP: 0018:ffffc90003ccf4e0 EFLAGS: 00010207\n\nRAX: dffffc0000000000 RBX: ffffc90003ccf5f8 RCX: ffffc9000c24b000\nRDX: 000000000000000f RSI: ffffffff8751cb13 RDI: 0000000000000000\nRBP: 0000000000000000 R08: 00000000000000f0 R09: 0000000000000140\nR10: fffffbfff181d972 R11: 0000000000000000 R12: ffff888161fc3640\nR13: 0000000000000a20 R14: 000000000000007e R15: ffffffff8dc5f620\nFS: 00007feb621e4700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007feb621e3ff8 CR3: 00000001643a9000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n<TASK>\nhsr_get_untagged_frame+0x4e/0x610 net/hsr/hsr_forward.c:164\nhsr_forward_do net/hsr/hsr_forward.c:461 [inline]\nhsr_forward_skb+0xcca/0x1d50 net/hsr/hsr_forward.c:623\nhsr_handle_frame+0x588/0x7c0 net/hsr/hsr_slave.c:69\n__netif_receive_skb_core+0x9fe/0x38f0 net/core/dev.c:5379\n__netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5483\n__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5599\nnetif_receive_skb_internal net/core/dev.c:5685 [inline]\nnetif_receive_skb+0x12f/0x8d0 net/core/dev.c:5744\ntun_rx_batched+0x4ab/0x7a0 drivers/net/tun.c:1544\ntun_get_user+0x2686/0x3a00 drivers/net/tun.c:1995\ntun_chr_write_iter+0xdb/0x200 drivers/net/tun.c:2025\ncall_write_iter include/linux/fs.h:2187 [inline]\nnew_sync_write fs/read_write.c:491 [inline]\nvfs_write+0x9e9/0xdd0 fs/read_write.c:584\nksys_write+0x127/0x250 fs/read_write.c:637\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/35ece858660eae13ee0242496a1956c39d29418e","https://git.kernel.org/stable/c/c46f2e0fcd1ecfc6046e5cf785ff89f0572f94e4","https://git.kernel.org/stable/c/d8b57135fd9ffe9a5b445350a686442a531c5339","https://git.kernel.org/stable/c/ff7ba766758313129794f150bbc4d351b5e17a53"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:18:08.089039631+00:00"},"epss":{"cve":"CVE-2022-50817","score":0.00238,"percentile":0.14857,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}