CVE-2026-74290

CVE CVE-2026-74290EUVD EUVD-2026-59437Published 2026-08-15T05:57:57.000ZLast changed 2026-08-17T05:16:36.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_flow: Dont expose folded kernel pointers The flow classifier falls back to addr_fold() for fields that are missing from packet headers. In map mode, userspace controls mask, xor, rshift, addend and divisor, and can observe the resulting classid through class statistics. This allows a tc classifier in a user/network namespace to recover the 32-bit folded value of skb->sk, skb_dst() or skb_nfct(). Align with standard kernel practices for pointer hashing and replace the XOR folding with a keyed siphash (which is cryptographically secure)

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 e5dfb815181fcb186d6080ac3a091eadff2d98fe <6151159618198675e01c391676e579738286c135; patch: 6.1.178; patch: 6.18.40; patch: 6.6.145; e5dfb815181fcb186d6080ac3a091eadff2d98fe <0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a; e5dfb815181fcb186d6080ac3a091eadff2d98fe <3d054001860270748405a3f9270c5fa0bf7ffc19; e5dfb815181fcb186d6080ac3a091eadff2d98fe <19f2ecf8ea564562c7e7a919cf38068dd9aa1c96; patch: 0; e5dfb815181fcb186d6080ac3a091eadff2d98fe <fb31fbe51c233f3bf47021121f63d2e42cac2d08; patch: 7.2; e5dfb815181fcb186d6080ac3a091eadff2d98fe <f294fc71c4a0fa4964f6428a1b4e7929c1d83125; patch: 6.12.97; patch: 7.1.5; 2.6.25

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

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Linux — Linux

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