Kernel memory compromise via unlocked SCTP IPv6 lookup
Published Dec 4, 2024 · Updated Aug 5, 2026
Use-after-free in the Linux kernel SCTP IPv6 bind path allows local users to read or alter kernel memory or crash the system. The sctp_v6_available() function calls dev_get_by_index_rcu() and ipv6_chk_addr() without an RCU read-side lock, leaving managed network-device state exposed to reclamation while the bind lookup uses it. A low-privileged local user must open and bind an SCTP IPv6 socket; successful exploitation compromises kernel memory or interrupts the system.
Summary
What happened
Use-after-free in the Linux kernel SCTP IPv6 bind path allows local users to read or alter kernel memory or crash the system. The sctp_v6_available() function calls dev_get_by_index_rcu() and ipv6_chk_addr() without an RCU read-side lock, leaving managed network-device state exposed to reclamation while the bind lookup uses it. A low-privileged local user must open and bind an SCTP IPv6 socket; successful exploitation compromises kernel memory or interrupts the system.
The record
- CVE
- CVE-2024-53139
- Published
- Dec 4, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 4, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.2
- Affected versionversion=6fe1e52490a91cb23f6b3aafc93e7c5beb99f862 <05656a66592759242c74063616291b7274d11b2f
- Affected versionversion=6fe1e52490a91cb23f6b3aafc93e7c5beb99f862 <ad975697211f4f2c4ce61c3ba524fd14d88ceab8
- Affected versionversion=6fe1e52490a91cb23f6b3aafc93e7c5beb99f862 <eb72e7fcc83987d5d5595b43222f23b295d5de7f
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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