CVE-2024-41065 Affecting kernel-headers package, versions <0:4.18.0-553.22.1.el8_10
Threat Intelligence
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Test your applications- Snyk IDSNYK-ALMALINUX8-KERNELHEADERS-8094769
- published25 Sept 2024
- disclosed24 Sept 2024
Introduced: 24 Sep 2024
CVE-2024-41065 (opens in a new tab)How to fix?
Upgrade AlmaLinux:8 kernel-headers to version 0:4.18.0-553.22.1.el8_10 or higher.
This issue was patched in ALSA-2024:7000.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by AlmaLinux.
See How to fix? for AlmaLinux:8 relevant fixed versions and status.
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 <SF,EE,ME,IR,DR,RI,LE> 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.
References
- https://errata.almalinux.org/8/ALSA-2024-7000.html
- https://access.redhat.com/security/cve/CVE-2024-41065
- https://access.redhat.com/errata/RHSA-2024:7000
- https://git.kernel.org/stable/c/0f5892212c27be31792ef1daa89c8dac1b3047e4
- https://git.kernel.org/stable/c/1a14150e1656f7a332a943154fc486504db4d586
- https://git.kernel.org/stable/c/1ee68686d1e2a5da35d5650be0be1ce06fe2ceb2
- https://git.kernel.org/stable/c/6b16098148ea58a67430d90e20476be2377c3acd
- https://git.kernel.org/stable/c/a7b952941ce07e1e7a2cafd08c64a98e14f553e6
- https://git.kernel.org/stable/c/e512a59b472684d8585125101ab03b86c2c1348a
- https://git.kernel.org/stable/c/e59822f9d700349cd17968d22c979db23a2d347f