CVE-2026-74582

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: packet: use consistent hard_header_len in non-ring send paths packet_snd() reads dev->hard_header_len multiple times while allocating and constructing an skb. Device reconfiguration can change this value concurrently, for example through bonding device type changes. For SOCK_RAW, packet_snd() can save a larger value in reserve and later allocate headroom using a smaller value. Moving skb->data back by reserve then places it before skb->head, and the following copy from userspace can attempt an out-of-bounds write. packet_se...

Affected product and versions

Product

Linux

Affected versions

>= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < bcd4df60ac9481b1ceffdfe5ec38fe51dcaae812, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 78a47127e33c340bc6d38dcc4552a094b4f5cc77, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 142e287b3a25cfe909215177c23243e7fc5ae2b1, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 91f041451f967cd87ed722a8f43c0b767a64f1a0, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 9052756290962ffb9a661bcf319e92dedaaedfed, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 5bb10753d428aadfc356a2bfe9acea09c82a62ec, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < b06b6fce6d7deaf7238e09b48ce3b1125ff41acd, >= b84bbaf7a6c8cca24f8acf25a2c8e46913a947ba < 03390aa32e669cc4ecd7d34108e2e1afc13d689d, >= d9fb8cc230b2a4757e9fe4f81468f81212d4deaa, >= 6190cce26e40bf71c4d375b21eea74bb07b6a0f3, >= 01a658c1b9d4b5393c38d5a92d9112ab1425382a, >= 8809ae6747e760e6f1d2453ceb08c9bcc4939766, >= 4.4.133 < 4.5, >= 4.9.103 < 4.10, >= 4.14.44 < 4.15, >= 4.16.12 < 4.17, >= 4.17

Fixed versions

No verified fixed-version field is available yet

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

Not available