Kernel code execution via failed TIPC socket insertion
Published Aug 10, 2026 · Updated Aug 10, 2026
Use-after-free in Linux kernel TIPC allows remote attackers to crash the kernel or execute code through failed socket insertion during accept. tipc_sk_create() frees a socket after tipc_sk_insert() fails but leaves sock->sk dangling, so tipc_release() writes to the freed sk_lock. Reachability requires a listening TIPC service and exhaustion of the per-namespace socket hash table to roughly two million entries.
Summary
What happened
Use-after-free in Linux kernel TIPC allows remote attackers to crash the kernel or execute code through failed socket insertion during accept. tipc_sk_create() frees a socket after tipc_sk_insert() fails but leaves sock->sk dangling, so tipc_release() writes to the freed sk_lock. Reachability requires a listening TIPC service and exhaustion of the per-namespace socket hash table to roughly two million entries.
The record
- CVE
- CVE-2026-68117
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-825, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=00aff3590fc0a73bddd3b743863c14e76fd35c0c <5f5a41a48dbf9eda57b67ce23e548602cf7195a6
- Affected versionversion=00aff3590fc0a73bddd3b743863c14e76fd35c0c <b07d87b31631edb6529e6cdcca790a7489d1250d
- Affected versionversion=00aff3590fc0a73bddd3b743863c14e76fd35c0c <ba0533fc163f905fe817cfabdf8ed4058da44800
- Affected versionversion=00aff3590fc0a73bddd3b743863c14e76fd35c0c <dd29891ed840f6b8d020b759d0dc4a00b1d6e4ea
- Affected versionversion=00aff3590fc0a73bddd3b743863c14e76fd35c0c <f9596b1566616a8be0592dbceccb6344a7c6f6bb
- Affected versionversion=3b2957fc09fe1ac7f07f40dd50dd5f93e3f3a7a2
- Affected versionversion=4.14.289 <4.15
- Affected versionversion=4.19.253 <4.20
- Affected versionversion=4919d82f7041157a421ca9bf39a78551d5ad8a1b
- Affected versionversion=4.9.324 <4.10
- Affected versionversion=5.10.132 <5.11
- Affected versionversion=5.15.56 <5.16
- Affected versionversion=5.18.13 <5.19
- Affected versionversion=5.19
- Affected versionversion=5.4.207 <5.5
- Affected versionversion=638fa20b618b2bbcf86da71231624cc82121a036
- Affected versionversion=7bc9e7f70bc57d8f02ffea2a42094281effb15ef
- Affected versionversion=833ecd0eae76eadf81d6d747bb5bc992d1151867
- Affected versionversion=ef488669b2652bde5b6ee5a409a5b048a2a50db4
- Affected versionversion=efa78f2ae363428525fb4981bb63c555ee79f3c7
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What is affected?
Published CVSS scores
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Attacks
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