{"id":"CVE-2024-39502","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nionic: fix use after netif_napi_del()\n\nWhen queues are started, netif_napi_add() and napi_enable() are called.\nIf there are 4 queues and only 3 queues are used for the …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nionic: fix use after netif_napi_del()\n\nWhen queues are started, netif_napi_add() and napi_enable() are called.\nIf there are 4 queues and only 3 queues are used for the …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.4, < 5.4.279","linux_kernel >= 5.5, < 5.10.221","linux_kernel >= 5.11, < 5.15.162","linux_kernel >= 5.16, < 6.1.95","linux_kernel >= 6.2, < 6.6.35","linux_kernel >= 6.7, < 6.9.6","linux_kernel = 6.10"],"patched":["linux_kernel 6.9.6"],"published":"2024-07-12","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:18:34.700","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-39502","references":[{"url":"https://git.kernel.org/stable/c/0d19267cb150e8f76ade210e16ee820a77f684e7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/183ebc167a8a19e916b885d4bb61a3491991bfa5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60cd714871cd5a683353a355cbb17a685245cf84","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/79f18a41dd056115d685f3b0a419c7cd40055e13","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8edd18dab443863e9e48f084e7f123fca3065e4e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a87d72b37b9ec2c1e18fe36b09241d8b30334a2e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff9c2a9426ecf5b9631e9fd74993b357262387d6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0d19267cb150e8f76ade210e16ee820a77f684e7","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/183ebc167a8a19e916b885d4bb61a3491991bfa5","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/60cd714871cd5a683353a355cbb17a685245cf84","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/79f18a41dd056115d685f3b0a419c7cd40055e13","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/8edd18dab443863e9e48f084e7f123fca3065e4e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/a87d72b37b9ec2c1e18fe36b09241d8b30334a2e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/ff9c2a9426ecf5b9631e9fd74993b357262387d6","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-355557.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-613116.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00307,"epssPercentile":0.23399,"ingestedAt":"2026-10-15T03:30:12.718Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T17:07:07.252622Z"},"slug":"CVE-2024-39502","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nionic: fix use after netif_napi_del()\n\nWhen queues are started, netif_napi_add() and napi_enable() are called.\nIf there are 4 queues and only 3 queues are used for the current\nconfiguration, only 3 queues' napi should be registered and enabled.\nThe ionic_qcq_enable() checks whether the .poll pointer is not NULL for\nenabling only the using queue' napi. Unused queues' napi will not be\nregistered by netif_napi_add(), so the .poll pointer indicates NULL.\nBut it couldn't distinguish whether the napi was unregistered or not\nbecause netif_napi_del() doesn't reset the .poll pointer to NULL.\nSo, ionic_qcq_enable() calls napi_enable() for the queue, which was\nunregistered by netif_napi_del().\n\nReproducer:\n   ethtool -L <interface name> rx 1 tx 1 combined 0\n   ethtool -L <interface name> rx 0 tx 0 combined 1\n   ethtool -L <interface name> rx 0 tx 0 combined 4\n\nSplat looks like:\nkernel BUG at net/core/dev.c:6666!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 3 PID: 1057 Comm: kworker/3:3 Not tainted 6.10.0-rc2+ #16\nWorkqueue: events ionic_lif_deferred_work [ionic]\nRIP: 0010:napi_enable+0x3b/0x40\nCode: 48 89 c2 48 83 e2 f6 80 b9 61 09 00 00 00 74 0d 48 83 bf 60 01 00 00 00 74 03 80 ce 01 f0 4f\nRSP: 0018:ffffb6ed83227d48 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: ffff97560cda0828 RCX: 0000000000000029\nRDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff97560cda0a28\nRBP: ffffb6ed83227d50 R08: 0000000000000400 R09: 0000000000000001\nR10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000\nR13: ffff97560ce3c1a0 R14: 0000000000000000 R15: ffff975613ba0a20\nFS:  0000000000000000(0000) GS:ffff975d5f780000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f8f734ee200 CR3: 0000000103e50000 CR4: 00000000007506f0\nPKRU: 55555554\nCall Trace:\n <TASK>\n ? die+0x33/0x90\n ? do_trap+0xd9/0x100\n ? napi_enable+0x3b/0x40\n ? do_error_trap+0x83/0xb0\n ? napi_enable+0x3b/0x40\n ? napi_enable+0x3b/0x40\n ? exc_invalid_op+0x4e/0x70\n ? napi_enable+0x3b/0x40\n ? asm_exc_invalid_op+0x16/0x20\n ? napi_enable+0x3b/0x40\n ionic_qcq_enable+0xb7/0x180 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8]\n ionic_start_queues+0xc4/0x290 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8]\n ionic_link_status_check+0x11c/0x170 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8]\n ionic_lif_deferred_work+0x129/0x280 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8]\n process_one_work+0x145/0x360\n worker_thread+0x2bb/0x3d0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xcc/0x100\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x2d/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n\n## Affected\n\n- `linux_kernel >= 5.4, < 5.4.279`\n- `linux_kernel >= 5.5, < 5.10.221`\n- `linux_kernel >= 5.11, < 5.15.162`\n- `linux_kernel >= 5.16, < 6.1.95`\n- `linux_kernel >= 6.2, < 6.6.35`\n- `linux_kernel >= 6.7, < 6.9.6`\n- `linux_kernel = 6.10`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.9.6`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}