- —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: netlink: avoid hashing the network namespace pointer The netlink rhashtable key includes a raw struct net pointer and a user-controlled port ID. Both /proc/net/netlink and socket diagnostics expose the table's bucket order. By binding and rebinding chosen NETLINK_USERSOCK port IDs, an unprivileged reader can distinguish equal buckets and recover the low bits of the Jenkins hash. Its 32-bit seed and the limited set of kernel-image slides can then be searched offline to recover the address of init_net. Use the namespace's unique, non-address net_cookie in the comparison key instead. It is assigned before the per-net initializers run and remains unchanged for the namespace's lifetime. The lookup key and object hash are still built by netlink_compare_arg_init(), keeping lookup, insertion, removal and rehashing consistent while preserving namespace separation. Neither public table walker needs to change. Reading the socket's namespace cookie in netlink_compare() is safe under RCU, including during namespace teardown. netlink_release() removes the socket from the hash table and defers its final put with call_rcu(). cleanup_net() runs the per-net exit methods and waits for outstanding RCU callbacks with rcu_barrier() before freeing namespace storage. Unlike ns.ns_id, net_cookie is also available and initialized during setup_net() in older stable kernels, making the change straightforward to backport to v5.15 and later.
Timeline
ID reserved
By Linux
- 33 days later
· 33 days later
Published
- 2 days later
· 2 days 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 (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < c61431f3b8c9824e9848a0308054f92b27fa7794
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < f8d2690f3c5dfad1fc306f6d5d84a1d3176c3af9
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < c03fb9c4be3b2dd0996d91e54f65407f7f475238
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < 41a2f69f091b0765f17890d8ac04852c12f25cf6
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < 18edcb9945118beb7a1b64a31a7370ecab485a79
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < bdd55b8a8acbf6b4840ab420eb6a63774bf4593b
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < 078deff25f8a849ecd1c3fe17b1e473b1cf44f28
- affected c428ecd1a21f1457ca3beb4df71b8a079c410e41 – < f88bb3606e4bd11ee035b682cddc2999e604609a
- affected 4.1
- unaffected < 4.1
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.161 – ≤ 6.6.*
- unaffected 6.12.115 – ≤ 6.12.*
- unaffected 6.18.59 – ≤ 6.18.*
- unaffected 7.2.13 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/c61431f3b8c9824e9848a0308054f92b27fa7794 (opens in a new tab)
- https://git.kernel.org/stable/c/f8d2690f3c5dfad1fc306f6d5d84a1d3176c3af9 (opens in a new tab)
- https://git.kernel.org/stable/c/c03fb9c4be3b2dd0996d91e54f65407f7f475238 (opens in a new tab)
- https://git.kernel.org/stable/c/41a2f69f091b0765f17890d8ac04852c12f25cf6 (opens in a new tab)
- https://git.kernel.org/stable/c/18edcb9945118beb7a1b64a31a7370ecab485a79 (opens in a new tab)
- https://git.kernel.org/stable/c/bdd55b8a8acbf6b4840ab420eb6a63774bf4593b (opens in a new tab)
- https://git.kernel.org/stable/c/078deff25f8a849ecd1c3fe17b1e473b1cf44f28 (opens in a new tab)
- https://git.kernel.org/stable/c/f88bb3606e4bd11ee035b682cddc2999e604609a (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-2026-111953 (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-2026-99201)Record last updated .