In the Linux kernel, the following vulnerability has been resolved:
tty: vt: initialize unicode screen buffer
syzbot reports kernel infoleak at vcs_read() [1], for buffer can be read immediately after resize operation. Initialize buffer using kzalloc().
---------- #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #include <linux/fb.h>
int main(int argc, char *argv[]) { struct fb_var_screeninfo var = { }; const int fb_fd = open("/dev/fb0", 3); ioctl(fb_fd, FBIOGET_VSCREENINFO, &var); var.yres = 0x21; ioctl(fb_fd, FBIOPUT_VSCREENINFO, &var); return read(open("/dev/vcsu", O_RDONLY), &var, sizeof(var)) == -1; } ----------
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.10.144-127.601Upgrade perfUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade bpftoolUpgrade kernel-livepatch-5.15.69-37.134Upgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade python-perf | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade python3-perf | Sep 15, 2025 | Sep 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libs | Oct 24, 2025 | Sep 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-gcp-5.4Upgrade linuxUpgrade linux-aws-5.4Upgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-gkeUpgrade linux-raspiUpgrade linux-hwe-5.15Upgrade linux-ibm-5.4Upgrade linux-intel-iotgUpgrade linux-riscv-5.15Upgrade linux-kvmUpgrade linux-oracleUpgrade linux-nvidiaUpgrade linux-aws-5.15Upgrade linux-aws-fipsUpgrade linux-hwe-5.4Upgrade linux-azure-fde-5.15Upgrade linux-gkeopUpgrade linux-azure-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-iotUpgrade linux-gcp-5.15Upgrade linux-gcp-fipsUpgrade linux-bluefieldUpgrade linux-azure-5.4Upgrade linux-realtimeUpgrade linux-raspi-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-awsUpgrade linux-gcp | Jun 26, 2025 | Jun 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 18, 2025 |
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