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HIGHCVE-2026-31563Published Modified CNA Linux

CVE-2026-31563: net: macb: Use dev_consume_skb_any() to free TX SKBs

In the Linux kernel, the following vulnerability has been resolved: net: macb: Use dev_consume_skb_any() to free TX SKBs The napi_consume_skb() function is not intended to be called in an IRQ disabled context. However, after commit 6bc8a5098bf4 ("net: macb: Fix tx_ptr_lock locking"), the freeing of TX SKBs is performed with IRQs disabled. To resolve the following call trace, use dev_consume_skb_any() for freeing TX SKBs: WARNING: kernel/softirq.c:430 at __local_bh_enable_ip+0x174/0x188, CPU#0: ksoftirqd/0/15 Modules linked in: CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 7.0.0-rc4-next-20260319-yocto-standard-dirty #37 PREEMPT Hardware name: ZynqMP ZCU102 Rev1.1 (DT) pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __local_bh_enable_ip+0x174/0x188 lr : local_bh_enable+0x24/0x38 sp : ffff800082b3bb10 x29: ffff800082b3bb10 x28: ffff0008031f3c00 x27: 000000000011ede0 x26: ffff000800a7ff00 x25: ffff800083937ce8 x24: 0000000000017a80 x23: ffff000803243a78 x22: 0000000000000040 x21: 0000000000000000 x20: ffff000800394c80 x19: 0000000000000200 x18: 0000000000000001 x17: 0000000000000001 x16: ffff000803240000 x15: 0000000000000000 x14: ffffffffffffffff x13: 0000000000000028 x12: ffff000800395650 x11: ffff8000821d1528 x10: ffff800081c2bc08 x9 : ffff800081c1e258 x8 : 0000000100000301 x7 : ffff8000810426ec x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000008 x1 : 0000000000000200 x0 : ffff8000810428dc Call trace: __local_bh_enable_ip+0x174/0x188 (P) local_bh_enable+0x24/0x38 skb_attempt_defer_free+0x190/0x1d8 napi_consume_skb+0x58/0x108 macb_tx_poll+0x1a4/0x558 __napi_poll+0x50/0x198 net_rx_action+0x1f4/0x3d8 handle_softirqs+0x16c/0x560 run_ksoftirqd+0x44/0x80 smpboot_thread_fn+0x1d8/0x338 kthread+0x120/0x150 ret_from_fork+0x10/0x20 irq event stamp: 29751 hardirqs last enabled at (29750): [<ffff8000813be184>] _raw_spin_unlock_irqrestore+0x44/0x88 hardirqs last disabled at (29751): [<ffff8000813bdf60>] _raw_spin_lock_irqsave+0x38/0x98 softirqs last enabled at (29150): [<ffff8000800f1aec>] handle_softirqs+0x504/0x560 softirqs last disabled at (29153): [<ffff8000800f2fec>] run_ksoftirqd+0x44/0x80

Metrics

CVSS v3.1
7.5
Severity
HIGH
Fixed in
0
Affected Products
2

Fix available

06.1.1686.6.1316.12.806.176.18.216.19.11647b8a2fe474474704110db6bd07f7a139e621eb7.078c8b090a3d5c1689dc989861b0163180db2b3f892e7081f0c79d9073087e54bab745bb184192c2e984350b37372f79f71d4f0a5264c640e40daf9ceca4d05afb4683d685bb2c6fccae4386c478f524af4bc91398b579730284328322365afa77a9d568f
Affected packages
  • Linux / Linux
    < 92e7081f0c79d9073087e54bab745bb184192c2e (from aeeafeb29b1b270302a9a85a13f7d70a68a3b9e6) · < 78c8b090a3d5c1689dc989861b0163180db2b3f8 (from 5430388a81113e62a2d48b5d7dc1e76231908ebf) · < 984350b37372f79f71d4f0a5264c640e40daf9ce (from 7db8aa3fc4ed0a2928246747b2514b0741a8187e) · < f4bc91398b579730284328322365afa77a9d568f (from 6bc8a5098bf4a365c4086a4a4130bfab10a58260) · < ca4d05afb4683d685bb2c6fccae4386c478f524a (from 6bc8a5098bf4a365c4086a4a4130bfab10a58260) · < 647b8a2fe474474704110db6bd07f7a139e621eb (from 6bc8a5098bf4a365c4086a4a4130bfab10a58260)
  • Linux / Linux
    6.17
    Fixed in 0, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11, 7.0
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H