CVE-2026-43178
In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user pr
CVSS
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Publicado: 6 may 2026 · Última mod.: 15 jul 2026 · CWE-415 · CWE-1341
0.1%EPSS · 30 días0.1%
2026-06-302026-07-16
In the Linux kernel, the following vulnerability has been resolved: procfs: fix possible double mmput() in do_procmap_query() When user provides incorrectly sized buffer for build ID for PROCMAP_QUERY we return with -ENAMETOOLONG error. After recent changes this condition happens later, after we unlocked mmap_lock/per-VMA lock and did mmput(), so original goto out is now wrong and will double-mmput() mm_struct. Fix by jumping further to clean up only vm_file and name_buf.
- git.kernel.orghttps://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3
- git.kernel.orghttps://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d
- git.kernel.orghttps://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f
- git.kernel.orghttps://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-43178
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2467227
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43178.json
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2026-239188.8 ALT98.7%
——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 CRÍ61.3%
——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 ALT52.9%
——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 ALT45.6%
——14Double free in Windows DHCP Server allows an authorized attacker to execute code over a network.2dCVE-2026-430119.8 CRÍ44.3%
——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 ALT40.8%
——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