Summary
[1.20.4-29.0.9]
- Security update for CVE-2026-50256 CVE-2026-50257 CVE-2026-50258
CVE-2026-50259 CVE-2026-50260 CVE-2026-50261 CVE-2026-50262
CVE-2026-50263 CVE-2026-50264 [Orabug: 39695293]
* Tue Jun 09 2026 Ronan Pigott 1.20.4-29.0.7
- Security update for CVE-2026-33999 CVE-2026-34000 CVE-2026-34001 CVE-2026-34002 CVE-2026-34003 [Orabug: 39440282]
[1.20.4-29.0.5]
- Security update for CVE-2025-62229 CVE-2025-62230 CVE-2025-62231 [Orabug: 38691191]
[1.20.4-29.0.3]
- Fix CVE-2025-49175, CVE-2025-49176, CVE-2025-49178, CVE-2025-49179, CVE-2025-49180 [Orabug: 38157695]
[1.20.4-29.0.1]
- Fixed CVE-2025-26594 CVE-2025-26595 CVE-2025-26596
- CVE-2025-26597 CVE-2025-26598 CVE-2025-26599 CVE-2025-26600
- CVE-2025-26601 [Orabug: 37712847]
Fixed packages 9
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 7 | xorg-x11-server-common | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-devel | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-source | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xdmx | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xephyr | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xnest | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xorg | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xvfb | 0:1.20.4-29.0.9.el7_9 |
| Oracle Linux · 7 | xorg-x11-server-Xwayland | 0:1.20.4-29.0.9.el7_9 |
Vulnerabilities 9
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The server allocates a 256 by…
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await…
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High 7.8
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 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 clien…
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb setmap request via mapwidths indexing
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. _XkbSetMapChecks() declares a fixed-size stack buffer mapWidths[256] indexed by key type index. The helper function CheckKeyTypes() writes to this buffer at a client-controlled o…
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()
A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may …
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()
A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. Th…
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High 7.8
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dri2 drigetbuffers/drigetbufferswithformat
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds heap write. This may be …
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Medium 5.5
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in glx changedrawableattributes
An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes(). A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to information disclosure. A wri…
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Medium 5.5
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.