In the Linux kernel, the following vulnerability has been resolved:
xfrm: espintcp: do not reuse an in-progress partial send
espintcp keeps a single in-flight transmit in ctx->partial.
Before building a new sk_msg, espintcp_sendmsg() first tries to flush
that state through espintcp_push_msgs().
For blocking callers, espintcp_push_msgs() may return success even when
the previous partial send is still pending. espintcp_sendmsg() would
then reinitialize emsg->skmsg and reuse ctx->partial while the old
transfer still owns that state.
Do not rebuild the send message when ctx->partial is still in progress.
If espintcp_push_msgs() returns with emsg->len still set, fail the new
send instead of overwriting the live partial state.
This is a memory-safety fix: reusing the live partial-send state can
leave a stale offset attached to a new sk_msg and lead to an out-of-
bounds read in the send path.
tcp_sendmsg_locked() already handles waiting for send buffer memory, so
the fix here is just to preserve espintcp's one-message-at-a-time
transmit state.
References
Configurations
Configuration 1 (hide)
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History
08 Jul 2026, 20:35
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* |
|
| CWE | CWE-787 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/1777ceac4bea5e568a5ad44b7f9bb219c1db21b6 - Patch | |
| References | () https://git.kernel.org/stable/c/37487d55bf3300e3d2c1368da5c2bd3e3834ea4f - Patch | |
| References | () https://git.kernel.org/stable/c/6564e9c7af7e1dc7bfe7f3093b728abe484d7630 - Patch | |
| References | () https://git.kernel.org/stable/c/8c6c691bf062dc0753a139a4ab8cb92a70fcf8f3 - Patch | |
| References | () https://git.kernel.org/stable/c/aa82a078f70f7ff88ba7d1017134e79d1ac140f2 - Patch | |
| References | () https://git.kernel.org/stable/c/ba21439302db9a82fe4edbed1e38a97271529421 - Patch | |
| References | () https://git.kernel.org/stable/c/c381039ade2e161ab08c0eda73c4f8b9a7115928 - Patch | |
| References | () https://git.kernel.org/stable/c/f9b38a8fbfa07f1deaf7ee1eb38fa8b21ea13990 - Patch |
28 Jun 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
24 Jun 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-24 08:16
Updated : 2026-07-08 20:35
NVD link : CVE-2026-52935
Mitre link : CVE-2026-52935
CVE.ORG link : CVE-2026-52935
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-787
Out-of-bounds Write