CVE - CVE-2025-37756

CVE-ID
CVE-2025-37756	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: net: tls: explicitly disallow disconnect syzbot discovered that it can disconnect a TLS socket and then run into all sort of unexpected corner cases. I have a vague recollection of Eric pointing this out to us a long time ago. Supporting disconnect is really hard, for one thing if offload is enabled we'd need to wait for all packets to be _acked_. Disconnect is not commonly used, disallow it. The immediate problem syzbot run into is the warning in the strp, but that's just the easiest bug to trigger: WARNING: CPU: 0 PID: 5834 at net/tls/tls_strp.c:486 tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486 RIP: 0010:tls_strp_msg_load+0x72e/0xa80 net/tls/tls_strp.c:486 Call Trace: <TASK> tls_rx_rec_wait+0x280/0xa60 net/tls/tls_sw.c:1363 tls_sw_recvmsg+0x85c/0x1c30 net/tls/tls_sw.c:2043 inet6_recvmsg+0x2c9/0x730 net/ipv6/af_inet6.c:678 sock_recvmsg_nosec net/socket.c:1023 [inline] sock_recvmsg+0x109/0x280 net/socket.c:1045 __sys_recvfrom+0x202/0x380 net/socket.c:2237
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a URL:https://git.kernel.org/stable/c/2bcad8fefcecdd5f005d8c550b25d703c063c34a MISC:https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6 URL:https://git.kernel.org/stable/c/5071a1e606b30c0c11278d3c6620cd6a24724cf6 MISC:https://git.kernel.org/stable/c/7bdcf5bc35ae59fc4a0fa23276e84b4d1534a3cf URL:https://git.kernel.org/stable/c/7bdcf5bc35ae59fc4a0fa23276e84b4d1534a3cf MISC:https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86 URL:https://git.kernel.org/stable/c/8513411ec321942bd3cfed53d5bb700665c67d86 MISC:https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6 URL:https://git.kernel.org/stable/c/9fcbca0f801580cbb583e9cb274e2c7fbe766ca6 MISC:https://git.kernel.org/stable/c/ac91c6125468be720eafde9c973994cb45b61d44 URL:https://git.kernel.org/stable/c/ac91c6125468be720eafde9c973994cb45b61d44 MISC:https://git.kernel.org/stable/c/c665bef891e8972e1d3ce5bbc0d42a373346a2c3 URL:https://git.kernel.org/stable/c/c665bef891e8972e1d3ce5bbc0d42a373346a2c3 MISC:https://git.kernel.org/stable/c/f3ce4d3f874ab7919edca364c147ac735f9f1d04 URL:https://git.kernel.org/stable/c/f3ce4d3f874ab7919edca364c147ac735f9f1d04
Assigning CNA
kernel.org
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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