High 7.8Published Apr 22, 2026

CVE-2026-31494net: macb: use the current queue number for stats

Updated under an hour ago (2026-10-19 07:23 UTC)

Does this affect you?

It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net: macb: use the current queue number for stats There's a potential mismatch between the memory reserved for statistics and the amount of memory written. gem_get_sset_count() correctly computes the number of stats based on the active queues, whereas gem_get_ethtool_stats() indiscriminately copies data using the maximum number of queues, and in the case the number of active queues is less than MACB_MAX_QUEUES, this results in a OOB write as observed in the KASAN splat. ================================================================== BUG: KASAN: vmalloc-out-of-bounds in gem_get_ethtool_stats+0x54/0x78 [macb] Write of size 760 at addr ffff80008080b000 by task ethtool/1027 CPU: [...] Tainted: [E]=UNSIGNED_MODULE Hardware name: raspberrypi rpi/rpi, BIOS 2025.10 10/01/2025 Call trace: show_stack+0x20/0x38 (C) dump_stack_lvl+0x80/0xf8 print_report+0x384/0x5e0 kasan_report+0xa0/0xf0 kasan_check_range+0xe8/0x190 __asan_memcpy+0x54/0x98 gem_get_ethtool_stats+0x54/0x78 [macb 926c13f3af83b0c6fe64badb21ec87d5e93fcf65] dev_ethtool+0x1220/0x38c0 dev_ioctl+0x4ac/0xca8 sock_do_ioctl+0x170/0x1d8 sock_ioctl+0x484/0x5d8 __arm64_sys_ioctl+0x12c/0x1b8 invoke_syscall+0xd4/0x258 el0_svc_common.constprop.0+0xb4/0x240 do_el0_svc+0x48/0x68 el0_svc+0x40/0xf8 el0t_64_sync_handler+0xa0/0xe8 el0t_64_sync+0x1b0/0x1b8 The buggy address belongs to a 1-page vmalloc region starting at 0xffff80008080b000 allocated at dev_ethtool+0x11f0/0x38c0 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff00000a333000 pfn:0xa333 flags: 0x7fffc000000000(node=0|zone=0|lastcpupid=0x1ffff) raw: 007fffc000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff00000a333000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff80008080b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff80008080b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff80008080b180: 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffff80008080b200: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffff80008080b280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== Fix it by making sure the copied size only considers the active number of queues.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd builds before 9738be665544281aa624842812c2fbfed6f88226; 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd builds before 240c5302eed83e34e98db18f6795ee5f40814024; from 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd before 9596759a84e1dbf2670518d85e969208960041f9; from 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd before 95246341945163ad9a250a87ca5bd1c1252777ae; 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd builds before 9d74d10e4e26672e139a8bcf8bf95957bf2d160f; 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd builds before 7ff87da099210856cbfe2f2f7f52ddfa57af4f0c; from 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd before e182fe273cdf5a8931592228196ef514ffac392b; 512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd builds before 72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.16.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 4.16; and 7 more ranges	NVD

References

https://git.kernel.org/stable/c/9738be665544281aa624842812c2fbfed6f88226patch
https://git.kernel.org/stable/c/240c5302eed83e34e98db18f6795ee5f40814024patch
https://git.kernel.org/stable/c/9596759a84e1dbf2670518d85e969208960041f9patch
https://git.kernel.org/stable/c/95246341945163ad9a250a87ca5bd1c1252777aepatch
https://git.kernel.org/stable/c/9d74d10e4e26672e139a8bcf8bf95957bf2d160fpatch
https://git.kernel.org/stable/c/7ff87da099210856cbfe2f2f7f52ddfa57af4f0cpatch
https://git.kernel.org/stable/c/e182fe273cdf5a8931592228196ef514ffac392bpatch
https://git.kernel.org/stable/c/72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.