CVE-2025-40323 — Use After Free in Linux

CWE-416 — Use After Free33 documents7 sources
Severity
3.2LOWOSV
No vector
EPSS
0.1%
top 79.07%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
LinuxLinux KernelDebian Linux+2 more
Timeline
PublishedDec 8
Latest updateApr 9

Description

In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fb_display[i]->mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fb_mode_is_equal+0x285/0x2f0 Read of size 4 at addr ff11000001b3c69c by task syz.xxx ... Call Trace: dump_stack_lvl+0xab/0xe0 print_address_description.constprop.0+0x2c/0x390 print_report+0xb9/0x280 kasan_report+0xb8/0xf0 fb_mode_is_equal+0x285/0x2f0 fbcon_mode_del…

Affected Packages7 packages

▶Linuxlinux/linux_kernel2.6.12 — 6.1.159+3
▶Debianlinux/linux_kernel< 6.1.159-1+2
▶Ubuntulinux/linux_kernel< 6.8.0-106.106+1
▶CVEListV5linux/linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 — 4ac18f0e6a6d599ca751c4cd98e522afc8e3d4eb+5

🔴Vulnerability Details

16
OSV
linux-raspi, linux-raspi-realtime vulnerabilities↗2026-04-01
▶
OSV
linux-azure-6.8 vulnerabilities↗2026-03-25
▶
OSV
linux-azure vulnerabilities↗2026-03-25
▶
OSV
linux-aws-6.8 vulnerabilities↗2026-03-23
▶
OSV
linux-realtime, linux-realtime-6.8 vulnerabilities↗2026-03-17
▶

📋Vendor Advisories

16
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2026-04-09
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-04-01
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-25
▶
Ubuntu
Linux kernel (Azure) vulnerabilities↗2026-03-25
▶
Ubuntu
Linux kernel (AWS) vulnerabilities↗2026-03-23
▶