{"id":"DEBIAN-CVE-2022-50159","details":"In the Linux kernel, the following vulnerability has been resolved:  of: check previous kernel's ima-kexec-buffer against memory bounds  Presently ima_get_kexec_buffer() doesn't check if the previous kernel's ima-kexec-buffer lies outside the addressable memory range. This can result in a kernel panic if the new kernel is booted with 'mem=X' arg and the ima-kexec-buffer was allocated beyond that range by the previous kernel. The panic is usually of the form below:  $ sudo kexec --initrd initrd vmlinux --append='mem=16G'  \u003csnip\u003e  BUG: Unable to handle kernel data access on read at 0xc000c01fff7f0000  Faulting instruction address: 0xc000000000837974  Oops: Kernel access of bad area, sig: 11 [#1] \u003csnip\u003e  NIP [c000000000837974] ima_restore_measurement_list+0x94/0x6c0  LR [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160  Call Trace:  [c00000000371fa80] [c00000000083b55c] ima_load_kexec_buffer+0xac/0x160  [c00000000371fb00] [c0000000020512c4] ima_init+0x80/0x108  [c00000000371fb70] [c0000000020514dc] init_ima+0x4c/0x120  [c00000000371fbf0] [c000000000012240] do_one_initcall+0x60/0x2c0  [c00000000371fcc0] [c000000002004ad0] kernel_init_freeable+0x344/0x3ec  [c00000000371fda0] [c0000000000128a4] kernel_init+0x34/0x1b0  [c00000000371fe10] [c00000000000ce64] ret_from_kernel_thread+0x5c/0x64  Instruction dump:  f92100b8 f92100c0 90e10090 910100a0 4182050c 282a0017 3bc00000 40810330  7c0802a6 fb610198 7c9b2378 f80101d0 \u003ca1240000\u003e 2c090001 40820614 e9240010  ---[ end trace 0000000000000000 ]---  Fix this issue by checking returned PFN range of previous kernel's ima-kexec-buffer with page_is_ram() to ensure correct memory bounds.","modified":"2026-09-01T16:05:34.727178916Z","published":"2025-06-18T11:15:46.090Z","upstream":["CVE-2022-50159"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50159"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50159.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50159.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50159.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"}]}