CVE-2026-80555s390/vfio_ccw: Free all memory if cp_init() fails
- 7.1HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% 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: s390/vfio_ccw: Free all memory if cp_init() fails The routine cp_free() is called to unpin/free any memory once an I/O is completed successfully, or if cp_prefetch() fails. But if cp_init() fails, and cp->initialized is not enabled, the same routine cannot be used to free all the memory. An attempt to address this exists in ccwchain_handle_ccw(), where a single call to ccwchain_free() is made for the currently-processed CCW segment. But this will leak other segments (created as a result of a Transfer in Channel) that had been allocated as part of the same channel program. Address this by performing the cleanup outside of the recursive ccwchain_handle_ccw()/ccwchain_loop_tic() logic.
Timeline
ID reserved
By Linux
Published
- 1 day later
· 1 day 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 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Received | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 276bd7ed34d56c48c65c43c0b08f2ee77029b2fa
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < f9bcff265556796834122f95de16d52a8375206c
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 17e01e342af74de12899c206dcc9ec90684703aa
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 152fcb74a26804b70909381c6acc90595a0ae1c1
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 6a917199aaf97904f5619afe3dfdacb155b03e8c
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 32e3d364a7b8295120d37e6a6bd433d2de26f748
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 4699b54fada156534cbb39834d47fc9374d7a1f5
- affected 8b515be512a2435bb8aedc6390cbe140167f9eb9 – < 74186c2968f8f756ac3226b545b598457c910c75
- affected 5.3
- unaffected < 5.3
- unaffected 5.10.267 – ≤ 5.10.*
- unaffected 5.15.218 – ≤ 5.15.*
- unaffected 6.1.185 – ≤ 6.1.*
- unaffected 6.6.154 – ≤ 6.6.*
- unaffected 6.12.105 – ≤ 6.12.*
- unaffected 6.18.46 – ≤ 6.18.*
- unaffected 7.1.10 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2fa (opens in a new tab)
- https://git.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c (opens in a new tab)
- https://git.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aa (opens in a new tab)
- https://git.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1 (opens in a new tab)
- https://git.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8c (opens in a new tab)
- https://git.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748 (opens in a new tab)
- https://git.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5 (opens in a new tab)
- https://git.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75 (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-2026-66470 (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-2026-80555)Record last updated .