CVE-2022-50656
In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Clear nfc_target before being used Fix a slab-out-of-bounds read that occurs in nla_put() called from nfc_genl_send_target() when target->sensb_res_len, which is duplicated…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: nfc: pn533: Clear nfc_target before being used Fix a slab-out-of-bounds read that occurs in nla_put() called from nfc_genl_send_target() when target->sensb_res_len, which is duplicated from an nfc_target in pn533, is too large as the nfc_target is not properly initialized and retains garbage values. Clear nfc_targets with memset() before they are used. Found by a modified version of syzkaller. BUG: KASAN: slab-out-of-bounds in nla_put Call Trace: memcpy nla_put nfc_genl_dump_targets genl_lock_dumpit netlink_dump __netlink_dump_start genl_family_rcv_msg_dumpit genl_rcv_msg netlink_rcv_skb genl_rcv netlink_unicast netlink_sendmsg sock_sendmsg ____sys_sendmsg ___sys_sendmsg __sys_sendmsg do_syscall_64
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.34% probability · 27th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8
- https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3
- https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03
- https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc
- https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe
- https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6
- https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b
- https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be
- https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.