CVE-2025-68802
- Source
- https://cve.org/CVERecord?id=CVE-2025-68802
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68802.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-68802
- Downstream
- Published
- 2026-01-13T15:29:11.079Z
- Modified
- 2026-02-09T19:36:45.012836Z
- Summary
- drm/xe: Limit num_syncs to prevent oversized allocations
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/xe: Limit num_syncs to prevent oversized allocations
The exec and vmbind ioctl allow userspace to specify an arbitrary numsyncs value. Without bounds checking, a very large num_syncs can force an excessively large allocation, leading to kernel warnings from the page allocator as below.
Introduce DRMXEMAX_SYNCS (set to 1024) and reject any request exceeding this limit.
" ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1217 at mm/pagealloc.c:5124 allocfrozenpagesnoprof+0x2f8/0x2180 mm/pagealloc.c:5124 ... Call Trace: <TASK> allocpagesmpol+0xe4/0x330 mm/mempolicy.c:2416 _kmalloclargenode+0xd8/0x110 mm/slub.c:4317 _kmalloclargenodenoprof+0x18/0xe0 mm/slub.c:4348 _dokmallocnode mm/slub.c:4364 [inline] _kmallocnoprof+0x3d4/0x4b0 mm/slub.c:4388 kmallocnoprof include/linux/slab.h:909 [inline] kmallocarraynoprof include/linux/slab.h:948 [inline] xeexecioctl+0xa47/0x1e70 drivers/gpu/drm/xe/xeexec.c:158 drmioctlkernel+0x1f1/0x3e0 drivers/gpu/drm/drmioctl.c:797 drmioctl+0x5e7/0xc50 drivers/gpu/drm/drmioctl.c:894 xedrmioctl+0x10b/0x170 drivers/gpu/drm/xe/xedevice.c:224 vfsioctl fs/ioctl.c:51 [inline] _dosysioctl fs/ioctl.c:598 [inline] _sesysioctl fs/ioctl.c:584 [inline] _x64sysioctl+0x18b/0x210 fs/ioctl.c:584 dosyscallx64 arch/x86/entry/syscall64.c:63 [inline] dosyscall64+0xbb/0x380 arch/x86/entry/syscall64.c:94 entrySYSCALL64afterhwframe+0x77/0x7f ... "
v2: Add "Reported-by" and Cc stable kernels. v3: Change XEMAXSYNCS from 64 to 1024. (Matt & Ashutosh) v4: s/XEMAXSYNCS/DRMXEMAX_SYNCS/ (Matt) v5: Do the check at the top of the exec func. (Matt)
(cherry picked from commit b07bac9bd708ec468cd1b8a5fe70ae2ac9b0a11c)
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68802.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/1d200017f55f829b9e376093bd31dfbec92081de
- https://git.kernel.org/stable/c/8e461304009135270e9ccf2d7e2dfe29daec9b60
- https://git.kernel.org/stable/c/e281d1fd6903a081ef023c341145ae92258e38d2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68802.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-68802
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd08ebf6c3525a7ea2186e636df064ea47281987Fixede281d1fd6903a081ef023c341145ae92258e38d2Fixed1d200017f55f829b9e376093bd31dfbec92081deFixed8e461304009135270e9ccf2d7e2dfe29daec9b60