- —Not scoredno CVSS score yet
- 0.20%Exploitation in 30 daysEPSS · top 90% 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: nbd: defer config unlock in nbd_genl_connect There is one use-after-free warning when running NBD_CMD_CONNECT and NBD_CLEAR_SOCK: nbd_genl_connect nbd_alloc_and_init_config // config_refs=1 nbd_start_device // config_refs=2 set NBD_RT_HAS_CONFIG_REF open nbd // config_refs=3 recv_work done // config_refs=2 NBD_CLEAR_SOCK // config_refs=1 close nbd // config_refs=0 refcount_inc -> uaf ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290 nbd_genl_connect+0x16d0/0x1ab0 genl_family_rcv_msg_doit+0x1f3/0x310 genl_rcv_msg+0x44a/0x790 The issue can be easily reproduced by adding a small delay before refcount_inc(&nbd->config_refs) in nbd_genl_connect(): mutex_unlock(&nbd->config_lock); if (!ret) { set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags); + printk("before sleep\n"); + mdelay(5 * 1000); + printk("after sleep\n"); refcount_inc(&nbd->config_refs); nbd_connect_reply(info, nbd->index); }
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 6 months later
· 6 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: Deferred.
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (11 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 e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < 330d688a5ca53857828081a3cf31b92ad1b0b3ed
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < cd93db1b1b4460e6ee77564024ea461e5940f69c
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < ae3e7bc1f4b393ae20e5c85583eb2c6977374716
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < 2e5e0665a594f076ef2b9439447bae8be293d09d
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < c9b99c948b4fb014812afe7b5ccf2db121d22e46
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < 9a38306643874566d20f7aba7dff9e6f657b51a9
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < c9e805f6a35d1dd189a9345595a5c20e87611942
- affected e46c7287b1c27683a8e30ca825fb98e2b97f1099 – < 1649714b930f9ea6233ce0810ba885999da3b5d4
- affected 4.12
- unaffected < 4.12
- unaffected 5.10.248 – ≤ 5.10.*
- unaffected 5.15.198 – ≤ 5.15.*
- unaffected 6.1.160 – ≤ 6.1.*
- unaffected 6.6.120 – ≤ 6.6.*
- unaffected 6.12.63 – ≤ 6.12.*
- unaffected 6.17.13 – ≤ 6.17.*
- unaffected 6.18.2 – ≤ 6.18.*
- unaffected 6.19 – ≤ *
References
References8
- https://git.kernel.org/stable/c/330d688a5ca53857828081a3cf31b92ad1b0b3ed (opens in a new tab)
- https://git.kernel.org/stable/c/cd93db1b1b4460e6ee77564024ea461e5940f69c (opens in a new tab)
- https://git.kernel.org/stable/c/ae3e7bc1f4b393ae20e5c85583eb2c6977374716 (opens in a new tab)
- https://git.kernel.org/stable/c/2e5e0665a594f076ef2b9439447bae8be293d09d (opens in a new tab)
- https://git.kernel.org/stable/c/c9b99c948b4fb014812afe7b5ccf2db121d22e46 (opens in a new tab)
- https://git.kernel.org/stable/c/9a38306643874566d20f7aba7dff9e6f657b51a9 (opens in a new tab)
- https://git.kernel.org/stable/c/c9e805f6a35d1dd189a9345595a5c20e87611942 (opens in a new tab)
- https://git.kernel.org/stable/c/1649714b930f9ea6233ce0810ba885999da3b5d4 (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-2025-205088 (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-2025-68366)Record last updated .