CVE-2026-68397
Detail
Received This CVE record has recently been published to the CVE List and has been included within the NVD dataset.
Description
In the Linux kernel, the following vulnerability has been resolved:
net/iucv: take a reference on the socket found in afiucv_hs_rcv()
afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,
drops the lock, and then passes the socket to the afiucv_hs_callback_*()
handlers without holding a reference. AF_IUCV sockets are not
RCU-protected and are freed synchronously by iucv_sock_kill() ->
sock_put(), so a concurrent close can free the socket in the window
between read_unlock() and the handler, which then dereferences freed
memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()).
Take a reference with sock_hold() while the socket is still on the list
and release it with sock_put() once the handler has run.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Change History
4 change records found show changes
CVE Modified by kernel.org
8/19/2026 1:20:47 PM
Action
Type
Old Value
New Value
Added
Reference
https://git.kernel.org/stable/c/5739be5c19495d709d902a2912c9102ce78740d5
Added
Reference
https://git.kernel.org/stable/c/bc6c6e546ffff8865daaeb622ef348c2d481e80f
Added
Reference
https://git.kernel.org/stable/c/e3e0679fc950191aff8f27fa78abcfc2462cff4a
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4dc0e63abf8bc7ba8892e617c1fb8b204361e022","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"1801cb20a5025a787d6853e19c38db138344b4b4","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"c75a950e77356e526672cba4584080c6c8b793b6","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5595ea59cdf29182cf6a270cacc1426c57b603de","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4fa349156043dc119721d067329714179f501749","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Record truncated, showing 2048 of 2447 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5739be5c19495d709d902a2912c9102ce78740d5","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"bc6c6e546ffff8865daaeb622ef348c2d481e80f","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"e3e0679fc950191aff8f27fa78abcfc2462cff4a","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4dc0e63abf8bc7ba8892e617c1fb8b204361e022","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"1801cb20a5025a787d6853e19c38db138344b4b4","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"c75a950e77356e526672cba4584080c6c8b793b6","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5595ea59cdf29182cf6a270cacc1426c57b603de","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4fa349156043dc119721d067329714179f501749","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","versionType":"semver","status":"unaffected"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status"
CVE Modified by kernel.org
8/17/2026 2:17:48 AM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4dc0e63abf8bc7ba8892e617c1fb8b204361e022","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"1801cb20a5025a787d6853e19c38db138344b4b4","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"c75a950e77356e526672cba4584080c6c8b793b6","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5595ea59cdf29182cf6a270cacc1426c57b603de","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4fa349156043dc119721d067329714179f501749","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc4","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4dc0e63abf8bc7ba8892e617c1fb8b204361e022","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"1801cb20a5025a787d6853e19c38db138344b4b4","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"c75a950e77356e526672cba4584080c6c8b793b6","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5595ea59cdf29182cf6a270cacc1426c57b603de","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4fa349156043dc119721d067329714179f501749","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
CVE Modified by kernel.org
8/13/2026 7:17:35 PM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
New CVE Received from kernel.org
8/10/2026 9:20:33 AM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
net/iucv: take a reference on the socket found in afiucv_hs_rcv()
afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,
drops the lock, and then passes the socket to the afiucv_hs_callback_*()
handlers without holding a reference. AF_IUCV sockets are not
RCU-protected and are freed synchronously by iucv_sock_kill() ->
sock_put(), so a concurrent close can free the socket in the window
between read_unlock() and the handler, which then dereferences freed
memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()).
Take a reference with sock_hold() while the socket is still on the list
and release it with sock_put() once the handler has run.
Added
Reference
https://git.kernel.org/stable/c/1801cb20a5025a787d6853e19c38db138344b4b4
Added
Reference
https://git.kernel.org/stable/c/4dc0e63abf8bc7ba8892e617c1fb8b204361e022
Added
Reference
https://git.kernel.org/stable/c/4fa349156043dc119721d067329714179f501749
Added
Reference
https://git.kernel.org/stable/c/5595ea59cdf29182cf6a270cacc1426c57b603de
Added
Reference
https://git.kernel.org/stable/c/c75a950e77356e526672cba4584080c6c8b793b6
Added
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4dc0e63abf8bc7ba8892e617c1fb8b204361e022","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"1801cb20a5025a787d6853e19c38db138344b4b4","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"c75a950e77356e526672cba4584080c6c8b793b6","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"5595ea59cdf29182cf6a270cacc1426c57b603de","versionType":"git","status":"affected"},{"version":"3881ac441f642d56503818123446f7298442236b","lessThan":"4fa349156043dc119721d067329714179f501749","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/iucv/af_iucv.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.2","status":"affected"},{"version":"0","lessThan":"3.2","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc4","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Quick Info
CVE Dictionary Entry: CVE-2026-68397 NVD
Published Date: 08/10/2026 NVD
Last Modified: 08/19/2026
Source: kernel.org
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