{"id":"CVE-2023-52907","state":"PUBLISHED","title":"nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()\n\nFix a use-after-free that occurs in hcd when in_urb sent from\npn533_usb_send_frame() is completed earlier than out_urb. Its callback\nfrees the skb data in pn533_send_async_complete() that is used as a\ntransfer buffer of out_urb. Wait before sending in_urb until the\ncallback of out_urb is called. To modify the callback of out_urb alone,\nseparate the complete function of out_urb and ack_urb.\n\nFound by a modified version of syzkaller.\n\nBUG: KASAN: use-after-free in dummy_timer\nCall Trace:\n memcpy (mm/kasan/shadow.c:65)\n dummy_perform_transfer (drivers/usb/gadget/udc/dummy_hcd.c:1352)\n transfer (drivers/usb/gadget/udc/dummy_hcd.c:1453)\n dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:1972)\n arch_static_branch (arch/x86/include/asm/jump_label.h:27)\n static_key_false (include/linux/jump_label.h:207)\n timer_expire_exit (include/trace/events/timer.h:127)\n call_timer_fn (kernel/time/timer.c:1475)\n expire_timers (kernel/time/timer.c:1519)\n __run_timers (kernel/time/timer.c:1790)\n run_timer_softirq (kernel/time/timer.c:1803)","publishedAt":"2024-08-21T06:10:48.171Z","updatedAt":"2026-08-05T09:11:54.905Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"35529d6b827eedb6bf7e81130e4b7e0aba9e58d2","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"321db5131c92983dac4f3338e8fbb6df214238c0","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"9424d2205fe94a095fb9365ec0c6137f0b394a2b","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"0ca78c99656f5c448567db1e148367aa3b01c80a","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"39ae73e581112cfe27ba50aecb1c891ce57cecb1","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"8998db5021a28ad67aa8d627bdb4226e4046ccc4","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"9dab880d675b9d0dd56c6428e4e8352a3339371d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/usb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.1","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.164","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.89","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.7","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/usb.c"]}],"references":["https://git.kernel.org/stable/c/35529d6b827eedb6bf7e81130e4b7e0aba9e58d2","https://git.kernel.org/stable/c/321db5131c92983dac4f3338e8fbb6df214238c0","https://git.kernel.org/stable/c/9424d2205fe94a095fb9365ec0c6137f0b394a2b","https://git.kernel.org/stable/c/0ca78c99656f5c448567db1e148367aa3b01c80a","https://git.kernel.org/stable/c/39ae73e581112cfe27ba50aecb1c891ce57cecb1","https://git.kernel.org/stable/c/8998db5021a28ad67aa8d627bdb4226e4046ccc4","https://git.kernel.org/stable/c/9dab880d675b9d0dd56c6428e4e8352a3339371d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52907.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52907","state":"PUBLISHED","datePublished":"2024-08-21T06:10:48.171Z","dateUpdated":"2026-08-05T09:11:54.905Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:07:11.015Z"},"containers":{"cna":{"title":"nfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: Wait for out_urb's completion in pn533_usb_send_frame()\n\nFix a use-after-free that occurs in hcd when in_urb sent from\npn533_usb_send_frame() is completed earlier than out_urb. Its callback\nfrees the skb data in pn533_send_async_complete() that is used as a\ntransfer buffer of out_urb. Wait before sending in_urb until the\ncallback of out_urb is called. To modify the callback of out_urb alone,\nseparate the complete function of out_urb and ack_urb.\n\nFound by a modified version of syzkaller.\n\nBUG: KASAN: use-after-free in dummy_timer\nCall Trace:\n memcpy (mm/kasan/shadow.c:65)\n dummy_perform_transfer (drivers/usb/gadget/udc/dummy_hcd.c:1352)\n transfer (drivers/usb/gadget/udc/dummy_hcd.c:1453)\n dummy_timer (drivers/usb/gadget/udc/dummy_hcd.c:1972)\n arch_static_branch (arch/x86/include/asm/jump_label.h:27)\n static_key_false (include/linux/jump_label.h:207)\n timer_expire_exit (include/trace/events/timer.h:127)\n call_timer_fn (kernel/time/timer.c:1475)\n expire_timers (kernel/time/timer.c:1519)\n __run_timers (kernel/time/timer.c:1790)\n run_timer_softirq (kernel/time/timer.c:1803)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"35529d6b827eedb6bf7e81130e4b7e0aba9e58d2","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"321db5131c92983dac4f3338e8fbb6df214238c0","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"9424d2205fe94a095fb9365ec0c6137f0b394a2b","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"0ca78c99656f5c448567db1e148367aa3b01c80a","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"39ae73e581112cfe27ba50aecb1c891ce57cecb1","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"8998db5021a28ad67aa8d627bdb4226e4046ccc4","versionType":"git"},{"version":"c46ee38620a2aa2b25b16bc9738ace80dbff76a4","status":"affected","lessThan":"9dab880d675b9d0dd56c6428e4e8352a3339371d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/usb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.1","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.164","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.89","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.7","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nfc/pn533/usb.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/35529d6b827eedb6bf7e81130e4b7e0aba9e58d2"},{"url":"https://git.kernel.org/stable/c/321db5131c92983dac4f3338e8fbb6df214238c0"},{"url":"https://git.kernel.org/stable/c/9424d2205fe94a095fb9365ec0c6137f0b394a2b"},{"url":"https://git.kernel.org/stable/c/0ca78c99656f5c448567db1e148367aa3b01c80a"},{"url":"https://git.kernel.org/stable/c/39ae73e581112cfe27ba50aecb1c891ce57cecb1"},{"url":"https://git.kernel.org/stable/c/8998db5021a28ad67aa8d627bdb4226e4046ccc4"},{"url":"https://git.kernel.org/stable/c/9dab880d675b9d0dd56c6428e4e8352a3339371d"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached via the local NFC control path (netlink GENL ops and AF_NFC sockets) that drives pn533_usb_send_frame() on an attached PN533 USB reader; a local attacker issues those host-side commands rather than exploiting a remote network service.\nAC:L - The race is between out_urb and in_urb completion that the attacker influences by submitting NFC/USB traffic (and fully controls with a USB gadget/dummy_hcd as in the syzkaller report), so success does not depend on conditions outside attacker influence.\nPR:L - Although NFC_CMD_DEV_UP/START_POLL require CAP_NET_ADMIN in the init user namespace, once a reader is up with targets an unprivileged AF_NFC SOCK_SEQPACKET client can connect, activate, and send data into pn533_transceive()/send_frame without further capabilities.\nUI:N - No separate victim action is required; exploitation proceeds by issuing NFC commands against an already-present PN533 USB device (or during automatic probe/setup traffic).\nS:U - This is a host-kernel UAF in the PN533 USB transport with impact confined to the same kernel authority; it is not a VM/IOMMU/sandbox boundary escape.\nC:H - The UAF frees the skb backing out_urb's transfer_buffer while the HCD still reads it, enabling heap-reuse disclosure of kernel memory (including to a colluding USB endpoint) per UAF scoring guidance.\nI:H - Use-after-free of the in-flight USB transfer buffer is memory corruption that can be leveraged via heap reuse for integrity compromise and control-flow hijacking under standard UAF exploitation.\nA:H - The same UAF triggers KASAN reports/oopses and unstable USB HCD access to freed memory, so availability impact is a kernel crash or hang."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T09:11:54.905Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"5.10.164"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"5.15.89"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.1.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.1","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-52907","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:03:08.481823Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:13.576Z"}}]}}}