{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53679","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-10-07T15:16:59.664Z","datePublished":"2025-10-07T15:21:33.926Z","dateUpdated":"2026-05-11T19:49:49.210Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:49:49.210Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt7601u: fix an integer underflow\n\nFix an integer underflow that leads to a null pointer dereference in\n'mt7601u_rx_skb_from_seg()'. The variable 'dma_len' in the URB packet\ncould be manipulated, which could trigger an integer underflow of\n'seg_len' in 'mt7601u_rx_process_seg()'. This underflow subsequently\ncauses the 'bad_frame' checks in 'mt7601u_rx_skb_from_seg()' to be\nbypassed, eventually leading to a dereference of the pointer 'p', which\nis a null pointer.\n\nEnsure that 'dma_len' is greater than 'min_seg_len'.\n\nFound by a modified version of syzkaller.\n\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G        W  O      5.14.0+\n#139\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\nRIP: 0010:skb_add_rx_frag+0x143/0x370\nCode: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44\n89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02\n00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00\nRSP: 0018:ffffc900000cfc90 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000\nRDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8\nRBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010\nR10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000\nR13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008\nFS:  0000000000000000(0000) GS:ffff88811a800000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n mt7601u_rx_tasklet+0xc73/0x1270\n ? mt7601u_submit_rx_buf.isra.0+0x510/0x510\n ? tasklet_action_common.isra.0+0x79/0x2f0\n tasklet_action_common.isra.0+0x206/0x2f0\n __do_softirq+0x1b5/0x880\n ? tasklet_unlock+0x30/0x30\n run_ksoftirqd+0x26/0x50\n smpboot_thread_fn+0x34f/0x7d0\n ? smpboot_register_percpu_thread+0x370/0x370\n kthread+0x3a1/0x480\n ? set_kthread_struct+0x120/0x120\n ret_from_fork+0x1f/0x30\nModules linked in: 88XXau(O) 88x2bu(O)\n---[ end trace 57f34f93b4da0f9b ]---\nRIP: 0010:skb_add_rx_frag+0x143/0x370\nCode: e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 86 01 00 00 4c 8d 7d 08 44\n89 68 08 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 <80> 3c 02\n00 0f 85 cd 01 00 00 48 8b 45 08 a8 01 0f 85 3d 01 00 00\nRSP: 0018:ffffc900000cfc90 EFLAGS: 00010202\nRAX: dffffc0000000000 RBX: ffff888115520dc0 RCX: 0000000000000000\nRDX: 0000000000000001 RSI: ffff8881118430c0 RDI: ffff8881118430f8\nRBP: 0000000000000000 R08: 0000000000000e09 R09: 0000000000000010\nR10: ffff888111843017 R11: ffffed1022308602 R12: 0000000000000000\nR13: 0000000000000e09 R14: 0000000000000010 R15: 0000000000000008\nFS:  0000000000000000(0000) GS:ffff88811a800000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000004035af40 CR3: 00000001157f2000 CR4: 0000000000750ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt7601u/dma.c"],"versions":[{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"67e4519afba215199b6dfa39ce5d7ea673ee4138","status":"affected","versionType":"git"},{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"47dc1f425af57b71111d7b01ebd24e04e8d967ef","status":"affected","versionType":"git"},{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"1a1f43059afae5cc9409e0c3bc63bfc09bc8facb","status":"affected","versionType":"git"},{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"61d0163e2be7a439cf6f82e9ad7de563ecf41e7a","status":"affected","versionType":"git"},{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"d0db59e2f718d1e2f1d2a2d8092168fdd2f3add0","status":"affected","versionType":"git"},{"version":"c869f77d6abb5d5f9f2f1a661d5c53862a9cad34","lessThan":"803f3176c5df3b5582c27ea690f204abb60b19b9","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt7601u/dma.c"],"versions":[{"version":"4.2","status":"affected"},{"version":"0","lessThan":"4.2","status":"unaffected","versionType":"semver"},{"version":"5.4.235","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.173","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.99","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.16","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.3","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.4.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.173"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.99"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/67e4519afba215199b6dfa39ce5d7ea673ee4138"},{"url":"https://git.kernel.org/stable/c/47dc1f425af57b71111d7b01ebd24e04e8d967ef"},{"url":"https://git.kernel.org/stable/c/1a1f43059afae5cc9409e0c3bc63bfc09bc8facb"},{"url":"https://git.kernel.org/stable/c/61d0163e2be7a439cf6f82e9ad7de563ecf41e7a"},{"url":"https://git.kernel.org/stable/c/d0db59e2f718d1e2f1d2a2d8092168fdd2f3add0"},{"url":"https://git.kernel.org/stable/c/803f3176c5df3b5582c27ea690f204abb60b19b9"}],"title":"wifi: mt7601u: fix an integer underflow","x_generator":{"engine":"bippy-1.2.0"}}}}