cbcvebase.
CVE-2024-38578
published 2024-06-19

CVE-2024-38578: In the Linux kernel, the following vulnerability has been resolved: ecryptfs: Fix buffer size for tag 66 packet The 'TAG 66 Packet Format' description is…

PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
18.1th percentile
In the Linux kernel, the following vulnerability has been resolved: ecryptfs: Fix buffer size for tag 66 packet The 'TAG 66 Packet Format' description is missing the cipher code and checksum fields that are packed into the message packet. As a result, the buffer allocated for the packet is 3 bytes too small and write_tag_66_packet() will write up to 3 bytes past the end of the buffer. Fix this by increasing the size of the allocation so the whole packet will always fit in the buffer. This fixes the below kasan slab-out-of-bounds bug: BUG: KASAN: slab-out-of-bounds in ecryptfs_generate_key_packet_set+0x7d6/0xde0 Write of size 1 at addr ffff88800afbb2a5 by task touch/181 CPU: 0 PID: 181 Comm: touch Not tainted 6.6.13-gnu #1 4c9534092be820851bb687b82d1f92a426598dc6 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2/GNU Guix 04/01/2014 Call Trace: dump_stack_lvl+0x4c/0x70 print_report+0xc5/0x610 ? ecryptfs_generate_key_packet_set+0x7d6/0xde0 ? kasan_complete_mode_report_info+0x44/0x210 ? ecryptfs_generate_key_packet_set+0x7d6/0xde0 kasan_report+0xc2/0x110 ? ecryptfs_generate_key_packet_set+0x7d6/0xde0 __asan_store1+0x62/0x80 ecryptfs_generate_key_packet_set+0x7d6/0xde0 ? __pfx_ecryptfs_generate_key_packet_set+0x10/0x10 ? __alloc_pages+0x2e2/0x540 ? __pfx_ovl_open+0x10/0x10 [overlay 30837f11141636a8e1793533a02e6e2e885dad1d] ? dentry_open+0x8f/0xd0 ecryptfs_write_metadata+0x30a/0x550 ? __pfx_ecryptfs_write_metadata+0x10/0x10 ? ecryptfs_get_lower_file+0x6b/0x190 ecryptfs_initialize_file+0x77/0x150 ecryptfs_create+0x1c2/0x2f0 path_openat+0x17cf/0x1ba0 ? __pfx_path_openat+0x10/0x10 do_filp_open+0x15e/0x290 ? __pfx_do_filp_open+0x10/0x10 ? __kasan_check_write+0x18/0x30 ? _raw_spin_lock+0x86/0xf0 ? __pfx__raw_spin_lock+0x10/0x10 ? __kasan_check_write+0x18/0x30 ? alloc_fd+0xf4/0x330 do_sys_openat2+0x122/0x160 ? __pfx_do_sys_openat2+0x10/0x10 __x64_sys_openat+0xef/0x170 ? __pfx___x64_sys_openat+0x10/0x10 do_syscall_64+0x60/0xd0 entry_SYSCALL_64_after_hwfra

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 1c125b9287e58f364d82174efb167414b92b11f11c125b9287e58f364d82174efb167414b92b11f1
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 235b85981051cd68fc215fd32a81c6f116bfc4df235b85981051cd68fc215fd32a81c6f116bfc4df
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < edbfc42ab080e78c6907d40a42c9d10b69e445c1edbfc42ab080e78c6907d40a42c9d10b69e445c1
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 12db25a54ce6bb22b0af28010fff53ef9cb3fe9312db25a54ce6bb22b0af28010fff53ef9cb3fe93
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 0d0f8ba042af16519f1ef7dd10463a33b21b677c0d0f8ba042af16519f1ef7dd10463a33b21b677c
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 2ed750b7ae1b5dc72896d7dd114c419afd3d19102ed750b7ae1b5dc72896d7dd114c419afd3d1910
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < a20f09452e2f58f761d11ad7b96b5c894c91030ea20f09452e2f58f761d11ad7b96b5c894c91030e
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < f6008487f1eeb8693f8d2a36a89c87d9122ddf74f6008487f1eeb8693f8d2a36a89c87d9122ddf74
linuxlinux>= dddfa461fc8951f9b5f951c13565b6cac678635a < 85a6a1aff08ec9f5b929d345d066e2830e8818e585a6a1aff08ec9f5b929d345d066e2830e8818e5
linuxlinux_kernel>= 0 < 5.10.221-15.10.221-1
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 6.8.12-16.8.12-1
linuxlinux_kernel>= 0 < 5.4.0-192.2125.4.0-192.212
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-40.406.8.0-40.40
linuxlinux_kernel>= 2.6.21 < 4.19.3164.19.316
linuxlinux_kernel>= 4.20 < 5.4.2785.4.278
linuxlinux_kernel>= 5.11 < 5.15.1615.15.161
linuxlinux_kernel>= 5.16 < 6.1.936.1.93
linuxlinux_kernel>= 5.5 < 5.10.2195.10.219
linuxlinux_kernel>= 6.2 < 6.6.336.6.33
linuxlinux_kernel>= 6.7 < 6.8.126.8.12

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu7.8HIGH
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.