--- id: CVE-2026-31563 title: |- 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 summary: |- 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 6bc… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' vendor: linux product: linux_kernel affected: - 'linux_kernel >= 6.1.151, < 6.1.168' - 'linux_kernel >= 6.6.105, < 6.6.131' - 'linux_kernel >= 6.12.46, < 6.12.80' - 'linux_kernel >= 6.16.6, < 6.17' - 'linux_kernel >= 6.17.1, < 6.18.21' - 'linux_kernel >= 6.19, < 6.19.11' - linux_kernel = 6.17 - linux_kernel = 7.0 patched: - linux_kernel 6.19.11 published: '2026-04-24' updated: '2026-10-15' sourceUpdated: '2026-10-15T02:19:11.283' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31563' references: - url: 'https://git.kernel.org/stable/c/647b8a2fe474474704110db6bd07f7a139e621eb' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/78c8b090a3d5c1689dc989861b0163180db2b3f8' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/92e7081f0c79d9073087e54bab745bb184192c2e' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/984350b37372f79f71d4f0a5264c640e40daf9ce' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/ca4d05afb4683d685bb2c6fccae4386c478f524a' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/f4bc91398b579730284328322365afa77a9d568f' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-082556.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31563.json - url: 'https://access.redhat.com/security/cve/CVE-2026-31563' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2461479' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-31563' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31563' - url: >- https://lore.kernel.org/linux-cve-announce/2026042459-CVE-2026-31563-ae94@gregkh/T tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00564 epssPercentile: 0.46678 ingestedAt: '2026-09-08T15:33:26.990Z' cwe: - CWE-821 --- ## Overview 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): [] _raw_spin_unlock_irqrestore+0x44/0x88 hardirqs last disabled at (29751): [] _raw_spin_lock_irqsave+0x38/0x98 softirqs last enabled at (29150): [] handle_softirqs+0x504/0x560 softirqs last disabled at (29153): [] run_ksoftirqd+0x44/0x80 ## Affected - `linux_kernel >= 6.1.151, < 6.1.168` - `linux_kernel >= 6.6.105, < 6.6.131` - `linux_kernel >= 6.12.46, < 6.12.80` - `linux_kernel >= 6.16.6, < 6.17` - `linux_kernel >= 6.17.1, < 6.18.21` - `linux_kernel >= 6.19, < 6.19.11` - `linux_kernel = 6.17` - `linux_kernel = 7.0` ## Remediation Upgrade past the affected range: - `linux_kernel 6.19.11` ## Vendor advisories - **Red Hat VEX** · Low · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31563.json)