9.8
CRITICAL CVSS 3.1
CVE-2026-68117
tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
Description

In the Linux kernel, the following vulnerability has been resolved: tipc: clear sock->sk on the failed-insert path in tipc_sk_create() When tipc_sk_create() fails to insert the new socket (tipc_sk_insert() returns non-zero), its error path frees the sk with sk_free() but leaves sock->sk pointing at the freed object: if (tipc_sk_insert(tsk)) { sk_free(sk); pr_warn("Socket create failed; port number exhausted\n"); return -EINVAL; } This is harmless for plain socket(): the syscall layer clears sock->ops before releasing, so tipc_release() is never called. It is not harmless on the accept() path. tipc_accept() creates the pre-allocated child socket with tipc_sk_create(net, new_sock, 0, kern); on failure it leaves new_sock->sk dangling and new_sock->ops non-NULL, and do_accept() then fput()s the new file, so __sock_release() -> tipc_release() runs lock_sock(new_sock->sk) on the freed sk -- a use-after-free write of the sk_lock spinlock. tipc_release() already guards this exact "failed accept() releases a pre-allocated child" case with "if (sk == NULL) return 0;", but the guard is bypassed because tipc_sk_create() left sock->sk non-NULL (dangling) rather than NULL. Clear sock->sk on the failed-insert path so the existing tipc_release() NULL check fires and the use-after-free is avoided. The tipc_sk_insert() failure is reached when the per-netns socket rhashtable hits its max_size (tsk_rht_params.max_size = 1048576, ~2M elements) -- i.e. once a netns holds ~2M TIPC sockets every insert returns -E2BIG. BUG: KASAN: slab-use-after-free in lock_sock_nested (net/core/sock.c:3839) Write of size 8 at addr ffff8880047cdc38 by task init/1 lock_sock_nested (net/core/sock.c:3839) tipc_release (net/tipc/socket.c:638) __sock_release (net/socket.c:710) sock_close (net/socket.c:1501) __fput (fs/file_table.c:512) Allocated by task 1: sk_alloc (net/core/sock.c:2308) tipc_sk_create (net/tipc/socket.c:487) tipc_accept (net/tipc/socket.c:2744) do_accept (net/socket.c:2034) Freed by task 1: __sk_destruct (net/core/sock.c:2391) tipc_sk_create (net/tipc/socket.c:504) tipc_accept (net/tipc/socket.c:2744) do_accept (net/socket.c:2034)

INFO

Published Date :

Aug. 10, 2026, 1:19 p.m.

Last Modified :

Aug. 17, 2026, 5:18 a.m.

Remotely Exploit :

Yes !

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2026-68117 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Clear the socket pointer after a failed insert to prevent use-after-free.
  • Set sock->sk to NULL on failed insert.
  • Review socket creation and release logic.
  • Apply kernel patches for TIPC module.
  • Test socket operations after patch.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-68117 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-68117 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-68117 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-68117 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'b07d87b31631edb6529e6cdcca790a7489d1250d', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': '5f5a41a48dbf9eda57b67ce23e548602cf7195a6', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'f9596b1566616a8be0592dbceccb6344a7c6f6bb', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'ba0533fc163f905fe817cfabdf8ed4058da44800', 'versionType': 'git'}, {'status': 'affected', 'version': '638fa20b618b2bbcf86da71231624cc82121a036', 'versionType': 'git'}, {'status': 'affected', 'version': '7bc9e7f70bc57d8f02ffea2a42094281effb15ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ef488669b2652bde5b6ee5a409a5b048a2a50db4', 'versionType': 'git'}, {'status': 'affected', 'version': '4919d82f7041157a421ca9bf39a78551d5ad8a1b', 'versionType': 'git'}, {'status': 'affected', 'version': 'efa78f2ae363428525fb4981bb63c555ee79f3c7', 'versionType': 'git'}, {'status': 'affected', 'version': '833ecd0eae76eadf81d6d747bb5bc992d1151867', 'versionType': 'git'}, {'status': 'affected', 'version': '3b2957fc09fe1ac7f07f40dd50dd5f93e3f3a7a2', 'versionType': 'git'}, {'status': 'affected', 'version': '4.9.324', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.289', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.253', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.207', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.132', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.56', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.13', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'b07d87b31631edb6529e6cdcca790a7489d1250d', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': '5f5a41a48dbf9eda57b67ce23e548602cf7195a6', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'f9596b1566616a8be0592dbceccb6344a7c6f6bb', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'ba0533fc163f905fe817cfabdf8ed4058da44800', 'versionType': 'git'}, {'status': 'affected', 'version': '638fa20b618b2bbcf86da71231624cc82121a036', 'versionType': 'git'}, {'status': 'affected', 'version': '7bc9e7f70bc57d8f02ffea2a42094281effb15ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ef488669b2652bde5b6ee5a409a5b048a2a50db4', 'versionType': 'git'}, {'status': 'affected', 'version': '4919d82f7041157a421ca9bf39a78551d5ad8a1b', 'versionType': 'git'}, {'status': 'affected', 'version': 'efa78f2ae363428525fb4981bb63c555ee79f3c7', 'versionType': 'git'}, {'status': 'affected', 'version': '833ecd0eae76eadf81d6d747bb5bc992d1151867', 'versionType': 'git'}, {'status': 'affected', 'version': '3b2957fc09fe1ac7f07f40dd50dd5f93e3f3a7a2', 'versionType': 'git'}, {'status': 'affected', 'version': '4.9.324', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.289', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.253', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.207', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.132', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.56', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.13', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 13, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 10, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'b07d87b31631edb6529e6cdcca790a7489d1250d', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': '5f5a41a48dbf9eda57b67ce23e548602cf7195a6', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'f9596b1566616a8be0592dbceccb6344a7c6f6bb', 'versionType': 'git'}, {'status': 'affected', 'version': '00aff3590fc0a73bddd3b743863c14e76fd35c0c', 'lessThan': 'ba0533fc163f905fe817cfabdf8ed4058da44800', 'versionType': 'git'}, {'status': 'affected', 'version': '638fa20b618b2bbcf86da71231624cc82121a036', 'versionType': 'git'}, {'status': 'affected', 'version': '7bc9e7f70bc57d8f02ffea2a42094281effb15ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ef488669b2652bde5b6ee5a409a5b048a2a50db4', 'versionType': 'git'}, {'status': 'affected', 'version': '4919d82f7041157a421ca9bf39a78551d5ad8a1b', 'versionType': 'git'}, {'status': 'affected', 'version': 'efa78f2ae363428525fb4981bb63c555ee79f3c7', 'versionType': 'git'}, {'status': 'affected', 'version': '833ecd0eae76eadf81d6d747bb5bc992d1151867', 'versionType': 'git'}, {'status': 'affected', 'version': '3b2957fc09fe1ac7f07f40dd50dd5f93e3f3a7a2', 'versionType': 'git'}, {'status': 'affected', 'version': '4.9.324', 'lessThan': '4.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.14.289', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.253', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.207', 'lessThan': '5.5', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.132', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.56', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.13', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/tipc/socket.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: tipc: clear sock->sk on the failed-insert path in tipc_sk_create() When tipc_sk_create() fails to insert the new socket (tipc_sk_insert() returns non-zero), its error path frees the sk with sk_free() but leaves sock->sk pointing at the freed object: if (tipc_sk_insert(tsk)) { sk_free(sk); pr_warn("Socket create failed; port number exhausted\n"); return -EINVAL; } This is harmless for plain socket(): the syscall layer clears sock->ops before releasing, so tipc_release() is never called. It is not harmless on the accept() path. tipc_accept() creates the pre-allocated child socket with tipc_sk_create(net, new_sock, 0, kern); on failure it leaves new_sock->sk dangling and new_sock->ops non-NULL, and do_accept() then fput()s the new file, so __sock_release() -> tipc_release() runs lock_sock(new_sock->sk) on the freed sk -- a use-after-free write of the sk_lock spinlock. tipc_release() already guards this exact "failed accept() releases a pre-allocated child" case with "if (sk == NULL) return 0;", but the guard is bypassed because tipc_sk_create() left sock->sk non-NULL (dangling) rather than NULL. Clear sock->sk on the failed-insert path so the existing tipc_release() NULL check fires and the use-after-free is avoided. The tipc_sk_insert() failure is reached when the per-netns socket rhashtable hits its max_size (tsk_rht_params.max_size = 1048576, ~2M elements) -- i.e. once a netns holds ~2M TIPC sockets every insert returns -E2BIG. BUG: KASAN: slab-use-after-free in lock_sock_nested (net/core/sock.c:3839) Write of size 8 at addr ffff8880047cdc38 by task init/1 lock_sock_nested (net/core/sock.c:3839) tipc_release (net/tipc/socket.c:638) __sock_release (net/socket.c:710) sock_close (net/socket.c:1501) __fput (fs/file_table.c:512) Allocated by task 1: sk_alloc (net/core/sock.c:2308) tipc_sk_create (net/tipc/socket.c:487) tipc_accept (net/tipc/socket.c:2744) do_accept (net/socket.c:2034) Freed by task 1: __sk_destruct (net/core/sock.c:2391) tipc_sk_create (net/tipc/socket.c:504) tipc_accept (net/tipc/socket.c:2744) do_accept (net/socket.c:2034)
    Added Reference https://git.kernel.org/stable/c/5f5a41a48dbf9eda57b67ce23e548602cf7195a6
    Added Reference https://git.kernel.org/stable/c/b07d87b31631edb6529e6cdcca790a7489d1250d
    Added Reference https://git.kernel.org/stable/c/ba0533fc163f905fe817cfabdf8ed4058da44800
    Added Reference https://git.kernel.org/stable/c/dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea
    Added Reference https://git.kernel.org/stable/c/f9596b1566616a8be0592dbceccb6344a7c6f6bb
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.