CVE-2026-63828
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
apparmor: mediate the implicit connect of TCP fast open sendmsg
In the Linux kernel, the following vulnerability has been resolved: apparmor: mediate the implicit connect of TCP fast open sendmsg sendmsg()/sendto() with MSG_FASTOPEN is a combination of connect(2) and write(2): it opens the connection in the SYN. apparmor_socket_sendmsg() only checks AA_MAY_SEND, so a profile that grants send but denies connect lets a confined task open an outbound TCP/MPTCP connection that connect(2) would have refused, bypassing connect mediation. Mediate the implicit connect when MSG_FASTOPEN is set and a destination is supplied. Add it to apparmor_socket_sendmsg() (not the shared aa_sock_msg_perm() helper, which recvmsg also uses) and call aa_sk_perm() directly, mirroring the selinux and tomoyo fixes. sk_is_tcp() does not cover MPTCP fast open, so the SOCK_STREAM/IPPROTO_MPTCP arm is explicit.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | a16714e7cf2baa98ba2efddd5d6cbac641f4e76b | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 20383429b56974507c465d016e5238b189f7a246 | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 7f57428ce00891d26b0f087ef754a4d820ec83aa | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | faea60deaa05c76f0772650f42eafde12bd39d93 | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 07b71c342382b854ab8030b244aeab6a7228ad7d | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 4a69b83045d3195d5b9a9b053ad840ddb2998b4e | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 45ebb934ea50b436ce49b2f159f090dab0d7fa28 | Unavailable | None listed |
| cf60af03ca4e71134206809ea892e49b92a88896 | affected | git | 4d587cd8a72155089a627130bbd4716ec0856e21 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.6 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.177 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.144 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.95 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.38 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.3 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |