CVE-2026-53294
In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel ca
CVSS
7.8
High
EPSS
0.1%
p3
KEV
—
Exploit Today
1
0-100
Published: Jun 26, 2026 · Last modified: Jul 8, 2026 · CWE-415
0.1%EPSS · 30 days0.2%
2026-06-302026-07-16
In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.
- git.kernel.orghttps://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4
- git.kernel.orghttps://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0
- git.kernel.orghttps://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060
- git.kernel.orghttps://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5
- git.kernel.orghttps://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d
- git.kernel.orghttps://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473
- git.kernel.orghttps://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6
- git.kernel.orghttps://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-239188.8 HIG98.7%
——30Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol.
This issue affects Apache HTTP Server: 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.2dCVE-2026-89259.8 CRI61.3%
——18The curl logic that works with SASL authentication could end up cleaning up
the GSASL context *twice* without clearing the pointer in between, making it
`free()` the same pointer twice.10dCVE-2026-338117.5 HIG52.9%
——16When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.1dCVE-2026-506857.5 HIG45.6%
——14Double free in Windows DHCP Server allows an authorized attacker to execute code over a network.2dCVE-2026-430119.8 CRI44.3%
——13In the Linux kernel, the following vulnerability has been resolved:
net/x25: Fix potential double free of skb
When alloc_skb fails in x25_queue_rx_frame it calls kfree_skb(skb) at
line 48 and returns 1 (error).
This error propagates back through the call chain:
x25_queue_rx_frame returns 1
|
v
x25_state3_machine receives the return value 1 and takes the else
branch at line 278, setting queued=0 and returning 0
|
v
x25_process_rx_frame returns queued=0
|
v
x25_backlog_rcv at line 452 sees queued=0 and calls kfree_skb(skb)
again
This would free the same skb twice. Looking at x25_backlog_rcv:
net/x25/x25_in.c:x25_backlog_rcv() {
...
queued = x25_process_rx_frame(sk, skb);
...
if (!queued)
kfree_skb(skb);
}3dCVE-2018-109027.8 HIG40.8%
——12It was found that the raw midi kernel driver does not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation.10d