- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 87% 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: HID: picolcd: clamp eeprom debugfs read to bytes actually received picolcd_debug_eeprom_read() trusts resp->raw_data[2] -- a length byte supplied by the device in its REPORT_EE_DATA reply -- clamped only to the caller's read() count: ret = resp->raw_data[2]; if (ret > s) ret = s; if (copy_to_user(u, resp->raw_data+3, ret)) It never checks resp->raw_size, the number of bytes picolcd_raw_event() actually copied into the 64-byte raw_data[] of the kmalloc'd struct picolcd_pending. A device (or a spoofed picoLCD) returning a length byte of 0xff, read with a count >= 255, makes copy_to_user() read past raw_data[] into adjacent slab memory and return it to userspace through the debugfs "eeprom" file: BUG: KASAN: slab-out-of-bounds in _copy_to_user Read of size 255 ... picolcd_debug_eeprom_read+0x214/0x2f0 [hid_picolcd] The debug-dump path in the same file already validates the device length byte against the received size before trusting it; this read does not. The file is created S_IRUSR (root-only) and a crafted device is needed, so it is neither unprivileged- nor remotely-triggerable. Clamp the copy length to resp->raw_size - 3 (the payload actually received, minus the 3-byte header), floored at 0 for short replies.
Timeline
ID reserved
By Linux
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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 87% 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 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 1a02056c2bf7ef9b5fd05ee6913aeeadb703c443
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 65daa322f1021d8206f8032c4cd4c0cb2d26c7c3
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 8dc662af019158690c470edd2e2857657f700abb
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 4daf432c94a42e7be6aa10b012b33af5ed9bc118
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < a3e6e8d7198a9f3861861520a38b673684a1062b
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 471f4a939c66d1d44aece2321807abf609fc9098
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < 699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84
- affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba – < e9c667395ac1f8024f623250b32bae4c7af9caa0
- affected 2.6.35
- unaffected < 2.6.35
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- 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
References8
- https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443 (opens in a new tab)
- https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3 (opens in a new tab)
- https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb (opens in a new tab)
- https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118 (opens in a new tab)
- https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b (opens in a new tab)
- https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098 (opens in a new tab)
- https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84 (opens in a new tab)
- https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0 (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-2026-76540 (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)
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[](https://cveledger.app/cve/CVE-2026-89628)Record last updated .