CVE-2025-39967
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
fbcon: fix integer overflow in fbcon_do_set_font
In the Linux kernel, the following vulnerability has been resolved: fbcon: fix integer overflow in fbcon_do_set_font Fix integer overflow vulnerabilities in fbcon_do_set_font() where font size calculations could overflow when handling user-controlled font parameters. The vulnerabilities occur when: 1. CALC_FONTSZ(h, pitch, charcount) performs h * pith * charcount multiplication with user-controlled values that can overflow. 2. FONT_EXTRA_WORDS * sizeof(int) + size addition can also overflow 3. This results in smaller allocations than expected, leading to buffer overflows during font data copying. Add explicit overflow checking using check_mul_overflow() and check_add_overflow() kernel helpers to safety validate all size calculations before allocation.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 96e41fc29e8af5c5085fb8a79cab8d0d00bab86c | affected | git | 994bdc2d23c79087fbf7dcd9544454e8ebcef877 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | 9c8ec14075c5317edd6b242f1be8167aa1e4e333 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | b8a6e85328aeb9881531dbe89bcd2637a06c3c95 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | a6eb9f423b3db000aaedf83367b8539f6b72dcfc | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | adac90bb1aaf45ca66f9db8ac100be16750ace78 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | 4a4bac869560f943edbe3c2b032062f6673b13d3 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7 | Unavailable | None listed |
| 39b3cffb8cf3111738ea993e2757ab382253d86a | affected | git | 1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe | Unavailable | None listed |
| ae021a904ac82d9fc81c25329d3c465c5a7d5686 | affected | git | Unavailable | Unavailable | None listed |
| 451bffa366f2cc0e5314807cb847f31c0226efed | affected | git | Unavailable | Unavailable | None listed |
| 2c455e9c5865861f5ce09c5f596909495ed7657c | affected | git | Unavailable | Unavailable | None listed |
| 72f099805dbc907fbe8fa19bccdc31d3e2ee6e9e | affected | git | Unavailable | Unavailable | None listed |
| 34cf1aff169dc6dedad8d79da7bf1b4de2773dbc | affected | git | Unavailable | Unavailable | None listed |
| 5.4.62 | affected | semver | 5.4.300 | Unavailable | None listed |
| 4.4.235 | affected | semver | 4.5 | Unavailable | None listed |
| 4.9.235 | affected | semver | 4.10 | Unavailable | None listed |
| 4.14.196 | affected | semver | 4.15 | Unavailable | None listed |
| 4.19.143 | affected | semver | 4.20 | Unavailable | None listed |
| 5.8.6 | affected | semver | 5.9 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 5.4.300 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.245 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.194 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.155 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.109 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.50 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.16.10 | unaffected | semver | Unavailable | 6.16.* | None listed |
| 6.17 | unaffected | original_commit_for_fix | Unavailable | * | None listed |