In the Linux kernel, the following vulnerability has been resolved:
sctp: validate STALE_COOKIE cause length before reading staleness
When an ERROR chunk with a STALE_COOKIE cause is received in the
COOKIE_ECHOED state, sctp_sf_do_5_2_6_stale() reads the 4-byte Measure
of Staleness that follows the cause header:
err = (struct sctp_errhdr *)(chunk->skb->data);
stale = ntohl(*(__be32 *)((u8 *)err + sizeof(*err)));
err is the first cause in the chunk, not the STALE_COOKIE cause that
caused the dispatch, and nothing guarantees the staleness field is
present. sctp_walk_errors() only requires a cause to be as long as the
4-byte header, so for a STALE_COOKIE cause of length 4 the read runs
past the cause, and for a minimal ERROR chunk past skb->tail. The value
is echoed to the peer in the Cookie Preservative of the reply INIT,
leaking uninitialized memory.
sctp_sf_cookie_echoed_err() already walks to the STALE_COOKIE cause, so
check its length there and pass it to sctp_sf_do_5_2_6_stale(), which
reads that cause instead of the first one. A STALE_COOKIE cause too
short to hold the staleness field is discarded.
The read is reachable by any peer that can drive an association into
COOKIE_ECHOED, including an unprivileged process using a raw SCTP socket
in a user and network namespace.
References
Configurations
Configuration 1 (hide)
|
History
13 Nov 2026, 18:23
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/08a8f2d13f703924316e9aeac863a88ef50990c7 - Patch | |
| References | () https://git.kernel.org/stable/c/1cd23ca80784223fa2204e16203f754da4e821f8 - Patch | |
| References | () https://git.kernel.org/stable/c/588706ebaf8cdb4a4161602949eba365514b1db1 - Patch | |
| References | () https://git.kernel.org/stable/c/6022da37786701df1fc5dd946a6dcba59d5473b1 - Patch | |
| References | () https://git.kernel.org/stable/c/861f884f5471632c731cbbd612a1c072e391a624 - Patch | |
| References | () https://git.kernel.org/stable/c/a257b41ddfe9e327b26581ad2777f04b23ac73f5 - Patch | |
| References | () https://git.kernel.org/stable/c/bbd6b2ea966cf57b6ae095cf5a8dbc993cd197a0 - Patch | |
| References | () https://git.kernel.org/stable/c/ebe0a55d954fa8da383b6192edb8f763dcb002d5 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* |
19 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-125 |
Information
Published : 2026-07-27 21:17
Updated : 2026-11-13 18:23
NVD link : CVE-2026-64551
Mitre link : CVE-2026-64551
CVE.ORG link : CVE-2026-64551
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read