EUVD-2025-201623Lifecycle Timeline
4DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
fbdev: bitblit: bound-check glyph index in bit_putcs*
bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address.
This fixes a global out-of-bounds read reported by syzbot.
Analysis
In the Linux kernel, the following vulnerability has been resolved:
fbdev: bitblit: bound-check glyph index in bit_putcs*
bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address.
This fixes a global out-of-bounds read reported by syzbot.
Technical ContextAI
An out-of-bounds memory access occurs when code reads from or writes to memory locations outside the intended buffer boundaries.
RemediationAI
Implement proper bounds checking on all array and buffer accesses. Use memory-safe languages or static analysis tools to detect OOB issues.
More in Linux Kernel
View allLinux kernel contains a flaw known as 'Dirty Pipe' where improper pipe buffer flag initialization allows unprivileged lo
The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does no
The packet_set_ring function in net/packet/af_packet.c in the Linux kernel through 4.10.6 does not properly validate cer
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial
Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. Rated high severity (CVSS 7.0). Public ex
The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr op
The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when
The compat_sys_recvmmsg function in net/compat.c in the Linux kernel before 3.13.2, when CONFIG_X86_X32 is enabled, allo
Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cau
The join_session_keyring function in security/keys/process_keys.c in the Linux kernel before 4.4.1 mishandles object ref
A remote code execution vulnerability in the Broadcom Wi-Fi firmware could enable a remote attacker to execute arbitrary
It was discovered that the cls_route filter implementation in the Linux kernel would not remove an old filter from the h
Same technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today