CVE-2026-53292net: phonet: do not BUG_ON() in pn_socket_autobind() on failed bind
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: net: phonet: do not BUG_ON() in pn_socket_autobind() on failed bind syzbot reported a kernel BUG triggered from pn_socket_sendmsg() via pn_socket_autobind(): kernel BUG at net/phonet/socket.c:213! RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline] RIP: 0010:pn_socket_sendmsg+0x240/0x250 net/phonet/socket.c:421 Call Trace: sock_sendmsg_nosec+0x112/0x150 net/socket.c:797 __sock_sendmsg net/socket.c:812 [inline] __sys_sendto+0x402/0x590 net/socket.c:2280 ... pn_socket_autobind() calls pn_socket_bind() with port 0 and, on -EINVAL, assumes the socket was already bound and asserts that the port is non-zero: err = pn_socket_bind(sock, ..., sizeof(struct sockaddr_pn)); if (err != -EINVAL) return err; BUG_ON(!pn_port(pn_sk(sock->sk)->sobject)); return 0; /* socket was already bound */ However pn_socket_bind() also returns -EINVAL when sk->sk_state is not TCP_CLOSE, even when the socket has never been bound and pn_port() is still 0. In that case the BUG_ON() fires and panics the kernel from a user-triggerable path. Treat the "bind returned -EINVAL but pn_port() is still 0" case as a regular error and propagate -EINVAL to the caller instead of crashing. Existing callers already translate a non-zero return from pn_socket_autobind() into -ENOBUFS/-EAGAIN, so returning -EINVAL here only changes behaviour from panic to a normal errno.
Timeline
ID reserved
By Linux
- 17 days later
· 17 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 6972021488e3142f30a89d8035eebeefbbe65656
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 4255c8f756b78d07800baf3320bdbdc130c54193
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 363c7fcac553dc2aa12fc90c6e5e6eba87500269
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 5459933a799aaf642cbeb35fdf7e78c59bf2fb9b
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 6db58ee730bf434d1afca91b91826e26688856ed
- affected ba113a94b7503ee23ffe819e7045134b0c1d31de – < 5b0c911bcdbd982f7748d11c0b39ec5808eae2de
- affected 2.6.28
- unaffected < 2.6.28
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/6972021488e3142f30a89d8035eebeefbbe65656 (opens in a new tab)
- https://git.kernel.org/stable/c/4255c8f756b78d07800baf3320bdbdc130c54193 (opens in a new tab)
- https://git.kernel.org/stable/c/363c7fcac553dc2aa12fc90c6e5e6eba87500269 (opens in a new tab)
- https://git.kernel.org/stable/c/5459933a799aaf642cbeb35fdf7e78c59bf2fb9b (opens in a new tab)
- https://git.kernel.org/stable/c/6db58ee730bf434d1afca91b91826e26688856ed (opens in a new tab)
- https://git.kernel.org/stable/c/5b0c911bcdbd982f7748d11c0b39ec5808eae2de (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)
- EUVD EUVD-2026-39897 (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://cveledger.app/cve/CVE-2026-53292)Record last updated .