Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 96e41fc29e8af5c5085fb8a79cab8d0d00bab86c before 994bdc2d23c79087fbf7dcd9544454e8ebcef877; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before 9c8ec14075c5317edd6b242f1be8167aa1e4e333; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before b8a6e85328aeb9881531dbe89bcd2637a06c3c95; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before a6eb9f423b3db000aaedf83367b8539f6b72dcfc; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before adac90bb1aaf45ca66f9db8ac100be16750ace78; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before 4a4bac869560f943edbe3c2b032062f6673b13d3; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7; affected 39b3cffb8cf3111738ea993e2757ab382253d86a before 1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe; affected ae021a904ac82d9fc81c25329d3c465c5a7d5686; affected 451bffa366f2cc0e5314807cb847f31c0226efed; affected 2c455e9c5865861f5ce09c5f596909495ed7657c; affected 72f099805dbc907fbe8fa19bccdc31d3e2ee6e9e; affected 34cf1aff169dc6dedad8d79da7bf1b4de2773dbc; affected 5.4.62 before 5.4.300; affected 4.4.235 before 4.5; affected 4.9.235 before 4.10; affected 4.14.196 before 4.15; affected 4.19.143 before 4.20; affected 5.8.6 before 5.9 |
| Linux / Linux | affected 5.9; unaffected 0 before 5.9; unaffected 5.4.300 through 5.4.*; unaffected 5.10.245 through 5.10.*; unaffected 5.15.194 through 5.15.*; unaffected 6.1.155 through 6.1.*; unaffected 6.6.109 through 6.6.*; unaffected 6.12.50 through 6.12.*; unaffected 6.16.10 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/994bdc2d23c79087fbf7dcd9544454e8ebcef877
- https://git.kernel.org/stable/c/9c8ec14075c5317edd6b242f1be8167aa1e4e333
- https://git.kernel.org/stable/c/b8a6e85328aeb9881531dbe89bcd2637a06c3c95
- https://git.kernel.org/stable/c/a6eb9f423b3db000aaedf83367b8539f6b72dcfc
- https://git.kernel.org/stable/c/adac90bb1aaf45ca66f9db8ac100be16750ace78
- https://git.kernel.org/stable/c/4a4bac869560f943edbe3c2b032062f6673b13d3
- https://git.kernel.org/stable/c/c0c01f9aa08c8e10e10e8c9ebb5be01a4eff6eb7
- https://git.kernel.org/stable/c/1a194e6c8e1ee745e914b0b7f50fa86c89ed13fe
ADP enrichment
No English description supplied.
No references supplied.