CVE-2025-39911

i40e: fix IRQ freeing in i40e_vsi_request_irq_msix error path

HIGH

7.8

CVSS Score

Published: October 1, 2025 at 07:44 AM UTC

Updated: October 19, 2026 at 09:10 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

HIGH7.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: i40e: fix IRQ freeing in i40e_vsi_request_irq_msix error path If request_irq() in i40e_vsi_request_irq_msix() fails in an iteration later than the first, the error path wants to free the IRQs requested so far. However, it uses the wrong dev_id argument for free_irq(), so it does not free the IRQs correctly and instead triggers the warning: Trying to free already-free IRQ 173 WARNING: CPU: 25 PID: 1091 at kernel/irq/manage.c:1829 __free_irq+0x192/0x2c0 Modules linked in: i40e(+) [...] CPU: 25 UID: 0 PID: 1091 Comm: NetworkManager Not tainted 6.17.0-rc1+ #1 PREEMPT(lazy) Hardware name: [...] RIP: 0010:__free_irq+0x192/0x2c0 [...] Call Trace: <TASK> free_irq+0x32/0x70 i40e_vsi_request_irq_msix.cold+0x63/0x8b [i40e] i40e_vsi_request_irq+0x79/0x80 [i40e] i40e_vsi_open+0x21f/0x2f0 [i40e] i40e_open+0x63/0x130 [i40e] __dev_open+0xfc/0x210 __dev_change_flags+0x1fc/0x240 netif_change_flags+0x27/0x70 do_setlink.isra.0+0x341/0xc70 rtnl_newlink+0x468/0x860 rtnetlink_rcv_msg+0x375/0x450 netlink_rcv_skb+0x5c/0x110 netlink_unicast+0x288/0x3c0 netlink_sendmsg+0x20d/0x430 ____sys_sendmsg+0x3a2/0x3d0 ___sys_sendmsg+0x99/0xe0 __sys_sendmsg+0x8a/0xf0 do_syscall_64+0x82/0x2c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]--- Use the same dev_id for free_irq() as for request_irq(). I tested this with inserting code to fail intentionally.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

3.13 ≤ v < 5.4.3005.11 ≤ v < 5.15.1945.16 ≤ v < 6.1.1535.5 ≤ v < 5.10.2456.13 ≤ v < 6.16.86.2 ≤ v < 6.6.1076.7 ≤ v < 6.12.483.13493fb30011b3ab5173cef96f1d1ce126da0517926.17 6.17 rc1 6.17 rc2 6.17 rc3 6.17 rc4 6.17 rc5

Vendor states this is fixed in 13ab9adef3cd386511c930a9660ae06595007f89 (fixed)

Vendor states this is fixed in 23431998a37764c464737b855c71a81d50992e98 (fixed)

Vendor states this is fixed in 6e4016c0dca53afc71e3b99e24252b63417395df (fixed)

Vendor states this is fixed in 915470e1b44e71d1dd07ee067276f003c3521ee3 (fixed)

Vendor states this is fixed in a30afd6617c30aaa338d1dbcb1e34e7a1890085c (fixed)

Vendor states this is fixed in b905b2acb3a0bbb08ad9be9984d8cdabdf827315 (fixed)

Vendor states this is fixed in b9721a023df38cf44a88f2739b4cf51efd051f85 (fixed)

Vendor states this is fixed in c62580674ce5feb1be4f90b5873ff3ce50e0a1db (fixed)

Vendor states this is fixed in 3.13 (unaffected)

Vendor states this is fixed in 5.10.245 (unaffected)

Vendor states this is fixed in 5.15.194 (unaffected)

Vendor states this is fixed in 5.4.300 (unaffected)