CVE-2026-68376
Detail
Received This CVE record has recently been published to the CVE List and has been included within the NVD dataset.
Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix auth_hmacs array size in struct sctp_cookie
The auth_hmacs array in struct sctp_cookie is supposed to store a complete
SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr
followed by N HMAC identifiers.
However, the array size was calculated using an extra 2 bytes instead of
sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers
are configured, the HMAC-ALGO parameter stored in the endpoint is larger
than the auth_hmacs buffer in the cookie.
As a result, sctp_association_init() copies beyond the end of auth_hmacs
when initializing the association, corrupting the adjacent auth_chunks
field. This can lead to an invalid HMAC identifier being accepted and later
cause an out-of-bounds read in sctp_auth_get_hmac().
Fix the array size calculation by including the full SCTP parameter header
size.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Change History
4 change records found show changes
CVE Modified by kernel.org
8/19/2026 1:20:46 PM
Action
Type
Old Value
New Value
Added
Reference
https://git.kernel.org/stable/c/0528485f27016a42804abe01aa61b39d85fa803e
Added
Reference
https://git.kernel.org/stable/c/317731d01b03c529809df36d3a7d149677a8729d
Added
Reference
https://git.kernel.org/stable/c/ee5e65964f456adfe14d526fba0bd055de98ecf3
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Record truncated, showing 2048 of 2469 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"317731d01b03c529809df36d3a7d149677a8729d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0528485f27016a42804abe01aa61b39d85fa803e","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"ee5e65964f456adfe14d526fba0bd055de98ecf3","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","versionType":"semver","status":"unaffected"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionT
CVE Modified by kernel.org
8/17/2026 2:17:45 AM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc4","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
CVE Modified by kernel.org
8/13/2026 7:17:32 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
New CVE Received from kernel.org
8/10/2026 9:20:30 AM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix auth_hmacs array size in struct sctp_cookie
The auth_hmacs array in struct sctp_cookie is supposed to store a complete
SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr
followed by N HMAC identifiers.
However, the array size was calculated using an extra 2 bytes instead of
sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers
are configured, the HMAC-ALGO parameter stored in the endpoint is larger
than the auth_hmacs buffer in the cookie.
As a result, sctp_association_init() copies beyond the end of auth_hmacs
when initializing the association, corrupting the adjacent auth_chunks
field. This can lead to an invalid HMAC identifier being accepted and later
cause an out-of-bounds read in sctp_auth_get_hmac().
Fix the array size calculation by including the full SCTP parameter header
size.
Added
Reference
https://git.kernel.org/stable/c/0b4414e43e0861d67276031cc21401d7e87de3da
Added
Reference
https://git.kernel.org/stable/c/3aa40c3bccac2312ea7cf97f329190637f972b5d
Added
Reference
https://git.kernel.org/stable/c/a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db
Added
Reference
https://git.kernel.org/stable/c/d0a59ba58578e2b330fff80a44fe519f3ba7d8c7
Added
Reference
https://git.kernel.org/stable/c/e0b5252a59383b77d1b8dbeda00b7184dd95f4d3
Added
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","versionType":"git","status":"affected"},{"version":"1f485649f52929d9937b346a920a522a7363e202","lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.24","status":"affected"},{"version":"0","lessThan":"2.6.24","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc4","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Quick Info
CVE Dictionary Entry: CVE-2026-68376 NVD
Published Date: 08/10/2026 NVD
Last Modified: 08/19/2026
Source: kernel.org
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