CVE-2022-50656
nfc: pn533: Clear nfc_target before being used
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Deferred | 3.1 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.34% · top 72% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < 9da4a0411f3455e3885831d0758bee3e3d565bbc
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < 61a7e15d55fae329a245535c3bac494e401005b8
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < bef2f478513e7367ef3b05441f6afca981de29be
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < 8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < aea9e64dec2cc6cd742e07ecd4e6236fc76b389b
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < 755019e37815a66bb0a23893debbd3dd640ccbd3
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < e491285b4d08884b622638be8e4961eb43b0af64
- affected 361f3cb7f9cfdb82c80926d0e7843c098c034545 – < 9f28157778ede0d4f183f7ab3b46995bb400abbe
- affected 3.3
- unaffected < 3.3
- unaffected 4.9.337 – ≤ 4.9.*
- unaffected 4.14.303 – ≤ 4.14.*
- unaffected 4.19.270 – ≤ 4.19.*
- unaffected 5.4.229 – ≤ 5.4.*
- unaffected 5.10.163 – ≤ 5.10.*
- unaffected 5.15.86 – ≤ 5.15.*
- unaffected 6.0.16 – ≤ 6.0.*
- unaffected 6.1.2 – ≤ 6.1.*
- unaffected 6.2 – ≤ *
References (9)
- https://git.kernel.org/stable/c/9da4a0411f3455e3885831d0758bee3e3d565bbc (opens in a new tab)
- https://git.kernel.org/stable/c/61a7e15d55fae329a245535c3bac494e401005b8 (opens in a new tab)
- https://git.kernel.org/stable/c/bef2f478513e7367ef3b05441f6afca981de29be (opens in a new tab)
- https://git.kernel.org/stable/c/8bddef54cbe9ede5ac7478f1e1e968fcfe7e6f03 (opens in a new tab)
- https://git.kernel.org/stable/c/aea9e64dec2cc6cd742e07ecd4e6236fc76b389b (opens in a new tab)
- https://git.kernel.org/stable/c/aae9c24ebd901f482e6c88b6f9e0c80dc5b536d6 (opens in a new tab)
- https://git.kernel.org/stable/c/755019e37815a66bb0a23893debbd3dd640ccbd3 (opens in a new tab)
- https://git.kernel.org/stable/c/e491285b4d08884b622638be8e4961eb43b0af64 (opens in a new tab)
- https://git.kernel.org/stable/c/9f28157778ede0d4f183f7ab3b46995bb400abbe (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50656)Record last updated .