cbcvebase.
CVE-2024-41065
published 2024-07-29

CVE-2024-41065: In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Whitelist dtl slub object for copying to userspace Reading the dispatch…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.22%
13.3th percentile
In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Whitelist dtl slub object for copying to userspace Reading the dispatch trace log from /sys/kernel/debug/powerpc/dtl/cpu-* results in a BUG() when the config CONFIG_HARDENED_USERCOPY is enabled as shown below. kernel BUG at mm/usercopy.c:102! Oops: Exception in kernel mode, sig: 5 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries Modules linked in: xfs libcrc32c dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth pseries_wdt dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse CPU: 27 PID: 1815 Comm: python3 Not tainted 6.10.0-rc3 #85 Hardware name: IBM,9040-MRX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NM1060_042) hv:phyp pSeries NIP: c0000000005d23d4 LR: c0000000005d23d0 CTR: 00000000006ee6f8 REGS: c000000120c078c0 TRAP: 0700 Not tainted (6.10.0-rc3) MSR: 8000000000029033 CR: 2828220f XER: 0000000e CFAR: c0000000001fdc80 IRQMASK: 0 [ ... GPRs omitted ... ] NIP [c0000000005d23d4] usercopy_abort+0x78/0xb0 LR [c0000000005d23d0] usercopy_abort+0x74/0xb0 Call Trace: usercopy_abort+0x74/0xb0 (unreliable) __check_heap_object+0xf8/0x120 check_heap_object+0x218/0x240 __check_object_size+0x84/0x1a4 dtl_file_read+0x17c/0x2c4 full_proxy_read+0x8c/0x110 vfs_read+0xdc/0x3a0 ksys_read+0x84/0x144 system_call_exception+0x124/0x330 system_call_vectored_common+0x15c/0x2ec --- interrupt: 3000 at 0x7fff81f3ab34 Commit 6d07d1cd300f ("usercopy: Restrict non-usercopy caches to size 0") requires that only whitelisted areas in slab/slub objects can be copied to userspace when usercopy hardening is enabled using CONFIG_HARDENED_USERCOPY. Dtl contains hypervisor dispatch events which are expected to be read by privileged users. Hence mark this safe for user access. Specify useroffset=0 and usersize=DISPATCH_LOG_BYTES to whitelist the entire object.

Affected

24 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.106-1 (bookworm)linux 6.1.106-1 (bookworm)
debianlinux-6.1< linux 6.1.106-1 (bookworm)linux 6.1.106-1 (bookworm)
linuxlinux
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < a7b952941ce07e1e7a2cafd08c64a98e14f553e6a7b952941ce07e1e7a2cafd08c64a98e14f553e6
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < 6b16098148ea58a67430d90e20476be2377c3acd6b16098148ea58a67430d90e20476be2377c3acd
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < e59822f9d700349cd17968d22c979db23a2d347fe59822f9d700349cd17968d22c979db23a2d347f
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < 1ee68686d1e2a5da35d5650be0be1ce06fe2ceb21ee68686d1e2a5da35d5650be0be1ce06fe2ceb2
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < e512a59b472684d8585125101ab03b86c2c1348ae512a59b472684d8585125101ab03b86c2c1348a
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < 0f5892212c27be31792ef1daa89c8dac1b3047e40f5892212c27be31792ef1daa89c8dac1b3047e4
linuxlinux>= af442a1baa6d00117cc7e7377ce7e6a545268684 < 1a14150e1656f7a332a943154fc486504db4d5861a14150e1656f7a332a943154fc486504db4d586
linuxlinux_kernel< 5.4.2815.4.281
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.223-15.10.223-1
linuxlinux_kernel>= 0 < 6.1.106-16.1.106-1
linuxlinux_kernel>= 0 < 6.9.11-16.9.11-1
linuxlinux_kernel>= 0 < 6.9.11-16.9.11-1
linuxlinux_kernel>= 0 < 5.4.0-200.2205.4.0-200.220
linuxlinux_kernel>= 0 < 5.15.0-125.1355.15.0-125.135
linuxlinux_kernel>= 0 < 6.8.0-48.486.8.0-48.48
linuxlinux_kernel>= 5.11 < 5.15.1645.15.164
linuxlinux_kernel>= 5.16 < 6.1.1016.1.101
linuxlinux_kernel>= 5.5 < 5.10.2235.10.223
linuxlinux_kernel>= 6.2 < 6.6.426.6.42
linuxlinux_kernel>= 6.7 < 6.9.116.9.11

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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.