CVE-2026-80982net/smc: fix use-after-free in smc_rx_pipe_buf_release()
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% 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/smc: fix use-after-free in smc_rx_pipe_buf_release() smc_rx_splice() hands RMB pages to a pipe and takes a socket reference per entry so the smc_sock stays alive until the reader finishes. The connection does not: a concurrent close runs smc_conn_free(), which releases the receive buffer back to the link group pool. smc_rx_pipe_buf_release() tests sk_state before taking the socket lock. The state can change between the test and the lock, and smc_rx_update_cons() then dereferences conn->rmb_desc and walks conn->lgr, which smc_conn_free() has already released. On the is_reg_err path smcr_buf_unuse() frees the descriptor outright, so this is a use-after-free. Take the socket lock first and test conn->freed instead. smc_conn_free() sets that flag before releasing anything, and every caller holds the socket lock. The two paths exclude each other: either the pipe release runs first with everything valid, or it sees the flag and skips the update.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 38 days later
· 38 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < dadd97c8296b23aa816e91ed70041820ae087baa
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < df441f3efbb50eb0f120b8de4bf441c31fb0551d
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < 6a644a7340df978785f3109d1e0726a982ce2c6f
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < 0761e49aa78c2f1362511054c6e9670653858837
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < 0926f59ca0f94120895b92180c636a48d0ed3a6d
- affected 9014db202cb764b8e14c53e7bacc81f9a1a2ba7f – < c924884743e948e25625b7fbf3ee2a9325a204a7
- affected 4.18
- unaffected < 4.18
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/dadd97c8296b23aa816e91ed70041820ae087baa (opens in a new tab)
- https://git.kernel.org/stable/c/df441f3efbb50eb0f120b8de4bf441c31fb0551d (opens in a new tab)
- https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f (opens in a new tab)
- https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837 (opens in a new tab)
- https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d (opens in a new tab)
- https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7 (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-2026-76305 (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-2026-80982)Record last updated .