5.5

CVE-2025-39967

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.
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Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.4.235 < 4.5
Linux ≫ Linux Kernel Version >= 4.9.235 < 4.10
Linux ≫ Linux Kernel Version >= 4.14.196 < 4.15
Linux ≫ Linux Kernel Version >= 4.19.143 < 4.20
Linux ≫ Linux Kernel Version >= 5.4.62 < 5.4.300
Linux ≫ Linux Kernel Version >= 5.8.6 < 5.9
Linux ≫ Linux Kernel Version >= 5.9.1 < 5.10.245
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.194
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.155
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.109
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.50
Linux ≫ Linux Kernel Version >= 6.13 < 6.16.10
Linux ≫ Linux Kernel Version5.9 Update-
Linux ≫ Linux Kernel Version5.9 Updaterc3
Linux ≫ Linux Kernel Version5.9 Updaterc4
Linux ≫ Linux Kernel Version5.9 Updaterc5
Linux ≫ Linux Kernel Version5.9 Updaterc6
Linux ≫ Linux Kernel Version5.9 Updaterc7
Linux ≫ Linux Kernel Version5.9 Updaterc8
Linux ≫ Linux Kernel Version6.17 Updaterc1
Linux ≫ Linux Kernel Version6.17 Updaterc2
Linux ≫ Linux Kernel Version6.17 Updaterc3
Linux ≫ Linux Kernel Version6.17 Updaterc4
Linux ≫ Linux Kernel Version6.17 Updaterc5
Linux ≫ Linux Kernel Version6.17 Updaterc6
Linux ≫ Linux Kernel Version6.17 Updaterc7
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.085
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.