Answer in brief
CVE-2026-53004 records a Unknown severity vulnerability in sctp: fix OOB write to userspace in sctp_getsockopt_peer_auth_chunks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <a132e199de69e2a45628aa8534df1bf5d44e1b6e || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <2b5a2c957c7769d40110f725cf23987fcef50d75 || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <d45c7e99caf915b0f6c716bd8ffe9d45b9685761 || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <d67fbc6dea5dbf7f46c618ebf65910a276078e20 || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <6849b995cda88a677bf08a05765d1db7905974fc || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <70a089cc9590aa347a61e84434116ab74619e3c3 || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <6bcf8fe4ef7967b22b814cbae9a57bbd3c853410 || >=65b07e5d0d09c77e98050b5f0146ead29e5add32 <0cf004ffb61cd32d140531c3a84afe975f9fc7ea | a132e199de69e2a45628aa8534df1bf5d44e1b6e, 2b5a2c957c7769d40110f725cf23987fcef50d75, d45c7e99caf915b0f6c716bd8ffe9d45b9685761, d67fbc6dea5dbf7f46c618ebf65910a276078e20, 6849b995cda88a677bf08a05765d1db7905974fc, 70a089cc9590aa347a61e84434116ab74619e3c3, 6bcf8fe4ef7967b22b814cbae9a57bbd3c853410, 0cf004ffb61cd32d140531c3a84afe975f9fc7ea |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: sctp: fix OOB write to userspace in sctp_getsockopt_peer_auth_chunks sctp_getsockopt_peer_auth_chunks() checks that the caller's optval buffer is large enough for the peer AUTH chunk list with if (len < num_chunks) return -EINVAL; but then writes num_chunks bytes to p->gauth_chunks, which lives at offset offsetof(struct sctp_authchunks, gauth_chunks) == 8 inside optval. The check is missing the sizeof(struct sctp_authchunks) = 8-byte header. When the caller supplies len == num_chunks (for any num_chunks > 0) the test passes but copy_to_user() writes sizeof(struct sctp_authchunks) = 8 bytes past the declared buffer. The sibling function sctp_getsockopt_local_auth_chunks() at the next line already has the correct check: if (len < sizeof(struct sctp_authchunks) + num_chunks) return -EINVAL; Align the peer variant with its sibling. Reproducer confirms on v7.0-13-generic: an unprivileged userspace caller that opens a loopback SCTP association with AUTH enabled, queries num_chunks with a short optval, then issues the real getsockopt with len == num_chunks and sentinel bytes painted past the buffer observes those sentinel bytes overwritten with the peer's AUTH chunk type. The bytes written are under the peer's control but land in the caller's own userspace; this is not a kernel memory corruption, but it is a kernel-side contract violation that can silently corrupt adjacent userspace data.
Quoted source text, attributed separately from HOL analysis.