{"id":"DEBIAN-CVE-2023-54278","details":"In the Linux kernel, the following vulnerability has been resolved:  s390/vmem: split pages when debug pagealloc is enabled  Since commit bb1520d581a3 (\"s390/mm: start kernel with DAT enabled\") the kernel crashes early during boot when debug pagealloc is enabled:  mem auto-init: stack:off, heap alloc:off, heap free:off addressing exception: 0005 ilc:2 [#1] SMP DEBUG_PAGEALLOC Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0-rc3-09759-gc5666c912155 #630 [..] Krnl Code: 00000000001325f6: ec5600248064 cgrj %r5,%r6,8,000000000013263e            00000000001325fc: eb880002000c srlg %r8,%r8,2           #0000000000132602: b2210051     ipte %r5,%r1,%r0,0           \u003e0000000000132606: b90400d1     lgr %r13,%r1            000000000013260a: 41605008     la %r6,8(%r5)            000000000013260e: a7db1000     aghi %r13,4096            0000000000132612: b221006d     ipte %r6,%r13,%r0,0            0000000000132616: e3d0d0000171 lay %r13,4096(%r13)  Call Trace:  __kernel_map_pages+0x14e/0x320  __free_pages_ok+0x23a/0x5a8)  free_low_memory_core_early+0x214/0x2c8  memblock_free_all+0x28/0x58  mem_init+0xb6/0x228  mm_core_init+0xb6/0x3b0  start_kernel+0x1d2/0x5a8  startup_continue+0x36/0x40 Kernel panic - not syncing: Fatal exception: panic_on_oops  This is caused by using large mappings on machines with EDAT1/EDAT2. Add the code to split the mappings into 4k pages if debug pagealloc is enabled by CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT or the debug_pagealloc kernel command line option.","modified":"2026-09-15T08:47:36.036945586Z","published":"2025-12-30T13:16:16.757Z","upstream":["CVE-2023-54278"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-54278"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54278.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.4.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54278.json"}}],"schema_version":"1.9.0"}