{"id":"CVE-2023-53679","title":"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()'","summary":"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…","severity":"high","cvss":8.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","cwe":["CWE-191"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.2, < 5.4.235","linux_kernel >= 5.5, < 5.10.173","linux_kernel >= 5.11, < 5.15.99","linux_kernel >= 5.16, < 6.1.16","linux_kernel >= 6.2, < 6.2.3"],"patched":["linux_kernel 6.2.3"],"published":"2025-10-07","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:17:46.143","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-53679","references":[{"url":"https://git.kernel.org/stable/c/1a1f43059afae5cc9409e0c3bc63bfc09bc8facb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47dc1f425af57b71111d7b01ebd24e04e8d967ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/61d0163e2be7a439cf6f82e9ad7de563ecf41e7a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/67e4519afba215199b6dfa39ce5d7ea673ee4138","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/803f3176c5df3b5582c27ea690f204abb60b19b9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d0db59e2f718d1e2f1d2a2d8092168fdd2f3add0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53679.json"},{"url":"https://access.redhat.com/security/cve/CVE-2023-53679"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2402215"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-53679"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53679"},{"url":"https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53679-929a@gregkh/T"},{"url":"https://access.redhat.com/errata/RHSA-2023:7077"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00241,"epssPercentile":0.1514,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-15T21:36:26.186264Z"},"scores":{"nvd":8.3,"vendor":6.5,"cna":8.3},"ingestedAt":"2026-10-15T22:48:25.415Z","slug":"CVE-2023-53679","body":"## Overview\n\nIn 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\n\n## Affected\n\n- `linux_kernel >= 4.2, < 5.4.235`\n- `linux_kernel >= 5.5, < 5.10.173`\n- `linux_kernel >= 5.11, < 5.15.99`\n- `linux_kernel >= 5.16, < 6.1.16`\n- `linux_kernel >= 6.2, < 6.2.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.2.3`\n\n## Vendor advisories\n\n- **RHSA-2023:7077** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat CodeReady Linux Builder (v. 8) · released 2023-11-14 · [advisory](https://access.redhat.com/errata/RHSA-2023:7077)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53679.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230083,"id":"CVE-2023-53679","ts":1793124781603,"field":"cvss","old":"6.5","new":"8.3"},{"seq":230082,"id":"CVE-2023-53679","ts":1793124781603,"field":"severity","old":"medium","new":"high"},{"seq":223751,"id":"CVE-2023-53679","ts":1792238387997,"field":"cvss","old":"8.3","new":"6.5"},{"seq":223750,"id":"CVE-2023-53679","ts":1792238387997,"field":"severity","old":"high","new":"medium"}]}