Описание
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | code not present |
| esm-infra-legacy/xenial | not-affected | code not present |
| esm-infra/bionic | not-affected | code not present |
| esm-infra/focal | not-affected | code not present |
| jammy | not-affected | code not present |
| noble | not-affected | code not present |
| questing | not-affected | code not present |
| resolute | not-affected | code not present |
| upstream | not-affected |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | DNE | |
| esm-infra-legacy/xenial | not-affected | code not present |
| jammy | DNE | |
| noble | DNE | |
| questing | DNE | |
| resolute | DNE | |
| upstream | not-affected |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | DNE | |
| esm-infra/bionic | not-affected | code not present |
| jammy | DNE | |
| noble | DNE | |
| questing | DNE | |
| resolute | DNE | |
| upstream | not-affected |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | needs-triage | |
| esm-infra-legacy/trusty | needs-triage | |
| esm-infra-legacy/xenial | needs-triage | |
| esm-infra/bionic | needs-triage | |
| esm-infra/focal | needs-triage | |
| jammy | needs-triage | |
| noble | needs-triage | |
| questing | needs-triage | |
| resolute | needs-triage | |
| upstream | needs-triage |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | DNE | |
| esm-infra-legacy/xenial | needs-triage | |
| jammy | DNE | |
| noble | DNE | |
| questing | DNE | |
| resolute | DNE | |
| upstream | needs-triage |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | DNE | |
| esm-infra/bionic | needs-triage | |
| jammy | DNE | |
| noble | DNE | |
| questing | DNE | |
| resolute | DNE | |
| upstream | needs-triage |
Показывать по
| Релиз | Статус | Примечание |
|---|---|---|
| devel | needs-triage | |
| jammy | needs-triage | |
| noble | needs-triage | |
| questing | needs-triage | |
| resolute | needs-triage | |
| upstream | released | 2:24.1.12-1 |
Показывать по
EPSS
7.8 High
CVSS3
Связанные уязвимости
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root.
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb key types due to unchecked shift levels
A stack-based buffer overflow flaw was found in the X.Org X server and ...
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root.
EPSS
7.8 High
CVSS3