{"id":"DEBIAN-CVE-2024-35995","details":"In the Linux kernel, the following vulnerability has been resolved:  ACPI: CPPC: Use access_width over bit_width for system memory accesses  To align with ACPI 6.3+, since bit_width can be any 8-bit value, it cannot be depended on to be always on a clean 8b boundary. This was uncovered on the Cobalt 100 platform.  SError Interrupt on CPU26, code 0xbe000011 -- SError  CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted 5.15.2.1-13 #1  Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION  pstate: 62400009 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)  pc : cppc_get_perf_caps+0xec/0x410  lr : cppc_get_perf_caps+0xe8/0x410  sp : ffff8000155ab730  x29: ffff8000155ab730 x28: ffff0080139d0038 x27: ffff0080139d0078  x26: 0000000000000000 x25: ffff0080139d0058 x24: 00000000ffffffff  x23: ffff0080139d0298 x22: ffff0080139d0278 x21: 0000000000000000  x20: ffff00802b251910 x19: ffff0080139d0000 x18: ffffffffffffffff  x17: 0000000000000000 x16: ffffdc7e111bad04 x15: ffff00802b251008  x14: ffffffffffffffff x13: ffff013f1fd63300 x12: 0000000000000006  x11: ffffdc7e128f4420 x10: 0000000000000000 x9 : ffffdc7e111badec  x8 : ffff00802b251980 x7 : 0000000000000000 x6 : ffff0080139d0028  x5 : 0000000000000000 x4 : ffff0080139d0018 x3 : 00000000ffffffff  x2 : 0000000000000008 x1 : ffff8000155ab7a0 x0 : 0000000000000000  Kernel panic - not syncing: Asynchronous SError Interrupt  CPU: 26 PID: 1510 Comm: systemd-udevd Not tainted 5.15.2.1-13 #1  Hardware name: MICROSOFT CORPORATION, BIOS MICROSOFT CORPORATION  Call trace:   dump_backtrace+0x0/0x1e0   show_stack+0x24/0x30   dump_stack_lvl+0x8c/0xb8   dump_stack+0x18/0x34   panic+0x16c/0x384   add_taint+0x0/0xc0   arm64_serror_panic+0x7c/0x90   arm64_is_fatal_ras_serror+0x34/0xa4   do_serror+0x50/0x6c   el1h_64_error_handler+0x40/0x74   el1h_64_error+0x7c/0x80   cppc_get_perf_caps+0xec/0x410   cppc_cpufreq_cpu_init+0x74/0x400 [cppc_cpufreq]   cpufreq_online+0x2dc/0xa30   cpufreq_add_dev+0xc0/0xd4   subsys_interface_register+0x134/0x14c   cpufreq_register_driver+0x1b0/0x354   cppc_cpufreq_init+0x1a8/0x1000 [cppc_cpufreq]   do_one_initcall+0x50/0x250   do_init_module+0x60/0x27c   load_module+0x2300/0x2570   __do_sys_finit_module+0xa8/0x114   __arm64_sys_finit_module+0x2c/0x3c   invoke_syscall+0x78/0x100   el0_svc_common.constprop.0+0x180/0x1a0   do_el0_svc+0x84/0xa0   el0_svc+0x2c/0xc0   el0t_64_sync_handler+0xa4/0x12c   el0t_64_sync+0x1a4/0x1a8  Instead, use access_width to determine the size and use the offset and width to shift and mask the bits to read/write out. Make sure to add a check for system memory since pcc redefines the access_width to subspace id.  If access_width is not set, then fall back to using bit_width.  [ rjw: Subject and changelog edits, comment adjustments ]","modified":"2026-09-15T09:03:07.483675291Z","published":"2024-05-20T10:15:13.597Z","upstream":["CVE-2024-35995"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-35995"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.90-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35995.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35995.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35995.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}