CVE-2026-68368

CVE CVE-2026-68368EUVD EUVD-2026-55469Published 2026-08-10T12:03:45.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: validate datagram bounds in ncm_unwrap_ntb() When unpacking host-supplied NTBs, ncm_unwrap_ntb() checks datagram length against frame_max but does not verify that the datagram fits within the declared block length. Additionally, when decoding multiple NTBs from a single socket buffer, subsequent block lengths are not checked against the actual remaining buffer data. With these checks missing, a malicious USB host can specify datagram offsets and lengths that point beyond the block, or supply secondary NTB headers declaring lengths larger than the buffer. skb_put_data() then copies adjacent kernel memory from skb_shared_info into the network skb. Fix this by verifying that sufficient buffer space remains for the NTB header before parsing, handling zero-length block declarations, ensuring that block lengths never exceed the remaining buffer space, and verifying that each datagram payload stays strictly within the block boundary.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 <41fd5f2fb0027d3773ae949e3247c2e0a2a7fe5c; e7ca00f35d8a17af1ae19d529193ebc21bfda164; patch: 7.1.6; ff3ba016263ee93a1c6209bf5ab1599de7ab1512; patch: 6.12.101; 4.14.328 <4.15; 4.19.143 <4.20; 4.19.297 <4.20; patch: 0; 4f529c4d1e436230d3af7c09a3239677a14d2b46; 5.8.6 <5.9; 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 <e07751d0527ccc2a1c32eb0b0b7da3b4b9b5381f; 5.9; 5.4.62 <5.5; 5bdf93a2f5459f944b416b188178ca4a92fd206f; patch: 6.18.42; ae6a5394d9fbe118bc95cfe376d6a9d91d7547e8; 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 <1febec7e47cdcd01f43fb0211094e3010474666e; 4.9.235 <4.10; 5.4.259 <5.5; patch: 6.6.148; 4.14.196 <4.15; patch: 7.2-rc5; 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 <fff1059d139ef798bab917990524faaf25854ca8; 471b23586387a32857778c511be60ab31c98dcfd; b88ad6e714284b33a47834f5f2a294c2b37c66aa; 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 <40c706a0224bde194667e3378c689b542fec4b44; f7e0611e207d8908c4f2858e244370529a76dbf7

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.