Access of Uninitialized Pointer Affecting kernel-rt-kvm package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-CENTOS10-KERNELRTKVM-18933433
- published19 Aug 2026
- disclosed15 Aug 2026
Introduced: 15 Aug 2026
NewCVE-2026-72441 (opens in a new tab)How to fix?
There is no fixed version for Centos:10 kernel-rt-kvm.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by Centos.
See How to fix? for Centos:10 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ieee802154: fix kernel-infoleak in dgram_recvmsg()
KMSAN reported a kernel-infoleak in move_addr_to_user():
BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:131 [inline] BUG: KMSAN: kernel-infoleak in _inline_copy_to_user include/linux/uaccess.h:205 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xcc/0x120 lib/usercopy.c:26 instrument_copy_to_user include/linux/instrumented.h:131 [inline] _inline_copy_to_user include/linux/uaccess.h:205 [inline] _copy_to_user+0xcc/0x120 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:236 [inline] move_addr_to_user+0x2e7/0x440 net/socket.c:302 ____sys_recvmsg+0x232/0x610 net/socket.c:2925 ... Uninit was stored to memory at: ieee802154_addr_to_sa include/net/ieee802154_netdev.h:369 [inline] dgram_recvmsg+0xa09/0xbe0 net/ieee802154/socket.c:739
The issue occurs because the pan_id field of struct ieee802154_addr
is left uninitialized when the address mode is IEEE802154_ADDR_NONE.
The execution flow is as follows:
__ieee802154_rx_handle_packet()declares a localstruct ieee802154_hdr hdron the stack.ieee802154_hdr_pull()callsieee802154_hdr_get_addr()to parse the source and destination addresses into this structure.- If the address mode is
IEEE802154_ADDR_NONE,ieee802154_hdr_get_addr()previously only set themodefield, leaving thepan_idfield containing uninitialized stack memory. - This uninitialized
pan_idis later copied into astruct sockaddr_ieee802154indgram_recvmsg()viaieee802154_addr_to_sa(). - Finally,
move_addr_to_user()copies the socket address structure to user space, leaking the uninitialized bytes.
Fix this by using memset to zero out the address structure in
ieee802154_hdr_get_addr() when the mode is IEEE802154_ADDR_NONE.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2516481
- https://access.redhat.com/security/cve/CVE-2026-72441
- https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368
- https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6
- https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6
- https://git.kernel.org/stable/c/a2ee1a038a16e286d084bc293a7522d010a59ec3
- https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204
- https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7
- https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1
- https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76