CVE-2026-74290net/sched: cls_flow: Dont expose folded kernel pointers
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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)
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < 19f2ecf8ea564562c7e7a919cf38068dd9aa1c96
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < 3d054001860270748405a3f9270c5fa0bf7ffc19
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < fb31fbe51c233f3bf47021121f63d2e42cac2d08
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < 0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < 6151159618198675e01c391676e579738286c135
- affected e5dfb815181fcb186d6080ac3a091eadff2d98fe – < f294fc71c4a0fa4964f6428a1b4e7929c1d83125
- affected 2.6.25
- unaffected < 2.6.25
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/19f2ecf8ea564562c7e7a919cf38068dd9aa1c96 (opens in a new tab)
- https://git.kernel.org/stable/c/3d054001860270748405a3f9270c5fa0bf7ffc19 (opens in a new tab)
- https://git.kernel.org/stable/c/fb31fbe51c233f3bf47021121f63d2e42cac2d08 (opens in a new tab)
- https://git.kernel.org/stable/c/0a8b5b74f0e6b6b9ce453bcfa4baa502c4c7577a (opens in a new tab)
- https://git.kernel.org/stable/c/6151159618198675e01c391676e579738286c135 (opens in a new tab)
- https://git.kernel.org/stable/c/f294fc71c4a0fa4964f6428a1b4e7929c1d83125 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59437 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74290)Record last updated .