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Vulnerability record · CVE-2026-52917 · published 24 June 2026

CVE-2026-52917: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: sctp: diag: reject stale associations in dump_one path The SCTP exact sock_diag lookup can hold a transport reference, block on lock_sock(sk), and then resume after sctp_association_free() has marked the association dead and freed its bind address list. When that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting. In particular, inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a real sctp_sockaddr_entry and trigger an out-of-bounds read from unrelated association memory. Reject the association after taking the socket lock if it has been reaped or detached from the endpoint, and report the lookup as stale. This keeps the exact dump-one path from formatting torn association state.

7.1 CVSS 3.1 High EPSS 0.13% · top 98.1% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
8 Jul 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: diag: reject stale associations in dump_one path The SCTP exact sock_diag lookup can hold a transport reference, block on lock_sock(sk), and then resume after sctp_association_free() has marked the association dead and freed its bind address list. When that happens, inet_assoc_attr_size() and inet_diag_msg_sctpasoc_fill() can still dereference association state that is no longer valid for reporting. In particular, inet_diag_msg_sctpasoc_fill() may read an empty bind-address list as a real sctp_sockaddr_entry and trigger an out-of-bounds read from unrelated association memory. Reject the association after taking the socket lock if it has been reaped or detached from the endpoint, and report the lookup as stale. This keeps the exact dump-one path from formatting torn association state.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/480f754580b5686b928977d16a59f20cef83ff01 Patch
https://git.kernel.org/stable/c/5425de8bd6e9fe5bd67d158e3348171ae7510117 Patch
https://git.kernel.org/stable/c/5eba3e48d78edd7551b992cb7ba687019b3a78da Patch
https://git.kernel.org/stable/c/6657af827e21883ae90693e42e7f59a6aab690b5 Patch
https://git.kernel.org/stable/c/78c4f964b2f94e405721c093773f6250e1e676b2 Patch
https://git.kernel.org/stable/c/b2be72d401833194917e44fbd8d8144bb4f2db16 Patch
https://git.kernel.org/stable/c/e97c2a535e23ed0fdd2660993fb3f10d9535c9bc Patch
https://git.kernel.org/stable/c/f5af203dec6e0e7a6090fcc2130e9f3901bfc84d Patch

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Source: NIST National Vulnerability Database (record CVE-2026-52917), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.