CVE-2025-38532: net: libwx: properly reset Rx ring descriptor
In the Linux kernel, the following vulnerability has been resolved:
net: libwx: properly reset Rx ring descriptor
When device reset is triggered by feature changes such as toggling Rx VLAN offload, wx->doreset() is called to reinitialize Rx rings. The hardware descriptor ring may retain stale values from previous sessions. And only set the length to 0 in rxdesc[0] would result in building malformed SKBs. Fix it to ensure a clean slate after device reset.
[ 549.186435] [ C16] ------------[ cut here ]------------ [ 549.186457] [ C16] kernel BUG at net/core/skbuff.c:2814! [ 549.186468] [ C16] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 549.186472] [ C16] CPU: 16 UID: 0 PID: 0 Comm: swapper/16 Kdump: loaded Not tainted 6.16.0-rc4+ #23 PREEMPT(voluntary) [ 549.186476] [ C16] Hardware name: Micro-Star International Co., Ltd. MS-7E16/X670E GAMING PLUS WIFI (MS-7E16), BIOS 1.90 12/31/2024 [ 549.186478] [ C16] RIP: 0010:pskbpulltail+0x3ff/0x510 [ 549.186484] [ C16] Code: 06 f0 ff 4f 34 74 7b 4d 8b 8c 24 c8 00 00 00 45 8b 84 24 c0 00 00 00 e9 c8 fd ff ff 48 c7 44 24 08 00 00 00 00 e9 5e fe ff ff <0f> 0b 31 c0 e9 23 90 5b ff 41 f7 c6 ff 0f 00 00 75 bf 49 8b 06 a8 [ 549.186487] [ C16] RSP: 0018:ffffb391c0640d70 EFLAGS: 00010282 [ 549.186490] [ C16] RAX: 00000000fffffff2 RBX: ffff8fe7e4d40200 RCX: 00000000fffffff2 [ 549.186492] [ C16] RDX: ffff8fe7c3a4bf8e RSI: 0000000000000180 RDI: ffff8fe7c3a4bf40 [ 549.186494] [ C16] RBP: ffffb391c0640da8 R08: ffff8fe7c3a4c0c0 R09: 000000000000000e [ 549.186496] [ C16] R10: ffffb391c0640d88 R11: 000000000000000e R12: ffff8fe7e4d40200 [ 549.186497] [ C16] R13: 00000000fffffff2 R14: ffff8fe7fa01a000 R15: 00000000fffffff2 [ 549.186499] [ C16] FS: 0000000000000000(0000) GS:ffff8fef5ae40000(0000) knlGS:0000000000000000 [ 549.186502] [ C16] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 549.186503] [ C16] CR2: 00007f77d81d6000 CR3: 000000051a032000 CR4: 0000000000750ef0 [ 549.186505] [ C16] PKRU: 55555554 [ 549.186507] [ C16] Call Trace: [ 549.186510] [ C16] <IRQ> [ 549.186513] [ C16] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 549.186517] [ C16] skbpad+0xc7/0xf0 [ 549.186523] [ C16] wxcleanrxirq+0x355/0x3b0 [libwx] [ 549.186533] [ C16] wxpoll+0x92/0x120 [libwx] [ 549.186540] [ C16] napipoll+0x28/0x190 [ 549.186544] [ C16] netrxaction+0x301/0x3f0 [ 549.186548] [ C16] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 549.186551] [ C16] ? rawspinlockirqsave+0x1e/0x50 [ 549.186554] [ C16] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 549.186557] [ C16] ? wakeupnohzcpu+0x35/0x160 [ 549.186559] [ C16] ? srsoaliasreturnthunk+0x5/0xfbef5 [ 549.186563] [ C16] handlesoftirqs+0xf9/0x2c0 [ 549.186568] [ C16] irqexitrcu+0xc7/0x130 [ 549.186572] [ C16] commoninterrupt+0xb8/0xd0 [ 549.186576] [ C16] </IRQ> [ 549.186577] [ C16] <TASK> [ 549.186579] [ C16] asmcommoninterrupt+0x22/0x40 [ 549.186582] [ C16] RIP: 0010:cpuidleenterstate+0xc2/0x420 [ 549.186585] [ C16] Code: 00 00 e8 11 0e 5e ff e8 ac f0 ff ff 49 89 c5 0f 1f 44 00 00 31 ff e8 0d ed 5c ff 45 84 ff 0f 85 40 02 00 00 fb 0f 1f 44 00 00 <45> 85 f6 0f 88 84 01 00 00 49 63 d6 48 8d 04 52 48 8d 04 82 49 8d [ 549.186587] [ C16] RSP: 0018:ffffb391c0277e78 EFLAGS: 00000246 [ 549.186590] [ C16] RAX: ffff8fef5ae40000 RBX: 0000000000000003 RCX: 0000000000000000 [ 549.186591] [ C16] RDX: 0000007fde0faac5 RSI: ffffffff826e53f6 RDI: ffffffff826fa9b3 [ 549.186593] [ C16] RBP: ffff8fe7c3a20800 R08: 0000000000000002 R09: 0000000000000000 [ 549.186595] [ C16] R10: 0000000000000000 R11: 000000000000ffff R12: ffffffff82ed7a40 [ 549.186596] [ C16] R13: 0000007fde0faac5 R14: 0000000000000003 R15: 0000000000000000 [ 549.186601] [ C16] ? cpuidleenterstate+0xb3/0x420 [ 549.186605] [ C16] cpuidleen ---truncated---
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
MS-7E16/X670E GAMING PLUS WIFI (MS-7E16)to a version that resolves this vulnerability.Fixed in BIOS 1.90 12/31/2024 - Configuration
Ensure a clean slate after device reset by properly resetting the net: libwx Rx ring descriptor; specifically set the length to 0 in rx_desc[0] during Rx ring reinitialization to avoid stale values and malformed SKBs after VLAN offload / device reset.
net: libwx Rx ring descriptor reset/length (rx_desc[0]) = 0
Event History
Frequently Asked Questions
What is the severity of CVE-2025-38532?
CVE-2025-38532 is considered a moderate severity vulnerability due to its potential impact on device functionality.
How do I fix CVE-2025-38532?
To fix CVE-2025-38532, update your Linux kernel to the latest version where this vulnerability has been addressed.
What impact does CVE-2025-38532 have on system security?
CVE-2025-38532 allows for improper handling of Rx ring descriptors, which could lead to data loss or degraded performance.
Which versions of the Linux kernel are affected by CVE-2025-38532?
CVE-2025-38532 affects multiple versions of the Linux kernel prior to the fix being implemented.
Is there a workaround for CVE-2025-38532 if I cannot update the kernel?
Currently, there are no official workarounds for CVE-2025-38532; an update is strongly recommended.