The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2394.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




====================================================================
Red Hat Security Advisory

Synopsis:           Important: kernel security, bug fix, and enhancement update
Advisory ID:        RHSA-2024:2394-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:2394
Issue date:         2024-04-30
Revision:           03
CVE Names:          CVE-2020-26555
====================================================================

Summary: 

An update for kernel is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.




Description:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: GSM multiplexing race condition leads to privilege escalation (CVE-2023-6546)

* kernel: multiple use-after-free vulnerabilities (CVE-2024-1086, CVE-2023-3567, CVE-2023-4133, CVE-2023-6932, CVE-2023-39198, CVE-2023-51043, CVE-2023-51779, CVE-2023-51780, CVE-2024-1085, CVE-2024-26582)

* kernel: Bluetooth BR/EDR PIN Pairing procedure is vulnerable to an impersonation attack (CVE-2020-26555)

* kernel: memcg does not limit the number of POSIX file locks allowing memory exhaustion (CVE-2022-0480)

* kernel: multiple NULL pointer dereference vulnerabilities (CVE-2022-38096, CVE-2023-6622, CVE-2023-6915, CVE-2023-42754, CVE-2023-46862, CVE-2023-52574, CVE-2024-0841, CVE-2023-52448)

* kernel: integer overflow in l2cap_config_req() in net/bluetooth/l2cap_core.c (CVE-2022-45934)

* kernel: netfilter: nf_tables: out-of-bounds access in nf_tables_newtable() (CVE-2023-6040)

* kernel: GC's deletion of an SKB races with unix_stream_read_generic()  leading to UAF (CVE-2023-6531)

* kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size (CVE-2023-6931)

* kernel: Bluetooth Forward and Future Secrecy Attacks and Defenses (CVE-2023-24023)

* kernel: irdma: Improper access control (CVE-2023-25775)

* Kernel: double free in hci_conn_cleanup of the bluetooth subsystem (CVE-2023-28464)

* kernel: Bluetooth: HCI: global out-of-bounds access in net/bluetooth/hci_sync.c (CVE-2023-28866)

* kernel: race condition between HCIUARTSETPROTO and HCIUARTGETPROTO in hci_uart_tty_ioctl (CVE-2023-31083)

* kernel: multiple out-of-bounds read vulnerabilities (CVE-2023-37453, CVE-2023-39189, CVE-2023-39193, CVE-2023-6121, CVE-2023-39194)

* kernel: netfilter: race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP (CVE-2023-42756)

* kernel: lib/kobject.c vulnerable to fill_kobj_path out-of-bounds write (CVE-2023-45863)

* kernel: smb: client: fix potential OOBs in smb2_parse_contexts() (CVE-2023-52434)

* kernel: mm/sparsemem: fix race in accessing memory_section->usage (CVE-2023-52489)

* kernel: net: fix possible store tearing in neigh_periodic_work() (CVE-2023-52522)

* kernel: multiple memory leak vulnerabilities (CVE-2023-52529, CVE-2023-52581)

* kernel: net: bridge: data races indata-races in br_handle_frame_finish() (CVE-2023-52578)

* kernel: net/core: kernel crash in ETH_P_1588 flow dissector (CVE-2023-52580)

* kernel: net/sched: act_ct: fix skb leak and crash on ooo frags (CVE-2023-52610)

* kernel: CIFS Filesystem Decryption Improper Input Validation Remote Code Execution Vulnerability in function receive_encrypted_standard of client (CVE-2024-0565)

* kernel: tls: race between async notify and socket close (CVE-2024-26583)

* kernel: tls: handle backlogging of crypto requests (CVE-2024-26584)

* kernel: tls: race between tx work scheduling and socket close (CVE-2024-26585)

* kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption (CVE-2024-26586)

* kernel: i2c: i801: Fix block process call transactions (CVE-2024-26593)

* kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier (CVE-2024-26602)

* kernel: netfilter: nf_tables: reject QUEUE/DROP verdict parameters (CVE-2024-26609)

* kernel: local dos vulnerability in scatterwalk_copychunks (CVE-2023-6176)

* kernel: perf/x86/lbr: Filter vsyscall addresses (CVE-2023-52476)

* kernel: netfilter: nf_tables: disallow timeout for anonymous sets (CVE-2023-52620)

* kernel: ip6_tunnel: fix NEXTHDR_FRAGMENT handling in ip6_tnl_parse_tlv_enc_lim() (CVE-2024-26633)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.4 Release Notes linked from the References section.


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2020-26555

References:

https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.4_release_notes/index
https://bugzilla.redhat.com/show_bug.cgi?id=1918601
https://bugzilla.redhat.com/show_bug.cgi?id=2049700
https://bugzilla.redhat.com/show_bug.cgi?id=2133452
https://bugzilla.redhat.com/show_bug.cgi?id=2151959
https://bugzilla.redhat.com/show_bug.cgi?id=2177759
https://bugzilla.redhat.com/show_bug.cgi?id=2185519
https://bugzilla.redhat.com/show_bug.cgi?id=2188102
https://bugzilla.redhat.com/show_bug.cgi?id=2210024
https://bugzilla.redhat.com/show_bug.cgi?id=2213132
https://bugzilla.redhat.com/show_bug.cgi?id=2218332
https://bugzilla.redhat.com/show_bug.cgi?id=2219359
https://bugzilla.redhat.com/show_bug.cgi?id=2221039
https://bugzilla.redhat.com/show_bug.cgi?id=2221463
https://bugzilla.redhat.com/show_bug.cgi?id=2221702
https://bugzilla.redhat.com/show_bug.cgi?id=2226777
https://bugzilla.redhat.com/show_bug.cgi?id=2226787
https://bugzilla.redhat.com/show_bug.cgi?id=2226788
https://bugzilla.redhat.com/show_bug.cgi?id=2231410
https://bugzilla.redhat.com/show_bug.cgi?id=2239845
https://bugzilla.redhat.com/show_bug.cgi?id=2239848
https://bugzilla.redhat.com/show_bug.cgi?id=2244720
https://bugzilla.redhat.com/show_bug.cgi?id=2246980
https://bugzilla.redhat.com/show_bug.cgi?id=2250043
https://bugzilla.redhat.com/show_bug.cgi?id=2252731
https://bugzilla.redhat.com/show_bug.cgi?id=2253034
https://bugzilla.redhat.com/show_bug.cgi?id=2253632
https://bugzilla.redhat.com/show_bug.cgi?id=2254961
https://bugzilla.redhat.com/show_bug.cgi?id=2254982
https://bugzilla.redhat.com/show_bug.cgi?id=2255283
https://bugzilla.redhat.com/show_bug.cgi?id=2255498
https://bugzilla.redhat.com/show_bug.cgi?id=2256490
https://bugzilla.redhat.com/show_bug.cgi?id=2256822
https://bugzilla.redhat.com/show_bug.cgi?id=2257682
https://bugzilla.redhat.com/show_bug.cgi?id=2258013
https://bugzilla.redhat.com/show_bug.cgi?id=2258518
https://bugzilla.redhat.com/show_bug.cgi?id=2260005
https://bugzilla.redhat.com/show_bug.cgi?id=2262126
https://bugzilla.redhat.com/show_bug.cgi?id=2262127
https://bugzilla.redhat.com/show_bug.cgi?id=2265285
https://bugzilla.redhat.com/show_bug.cgi?id=2265517
https://bugzilla.redhat.com/show_bug.cgi?id=2265518
https://bugzilla.redhat.com/show_bug.cgi?id=2265519
https://bugzilla.redhat.com/show_bug.cgi?id=2265520
https://bugzilla.redhat.com/show_bug.cgi?id=2265645
https://bugzilla.redhat.com/show_bug.cgi?id=2265646
https://bugzilla.redhat.com/show_bug.cgi?id=2265653
https://bugzilla.redhat.com/show_bug.cgi?id=2267041
https://bugzilla.redhat.com/show_bug.cgi?id=2267695
https://bugzilla.redhat.com/show_bug.cgi?id=2267750
https://bugzilla.redhat.com/show_bug.cgi?id=2267758
https://bugzilla.redhat.com/show_bug.cgi?id=2267760
https://bugzilla.redhat.com/show_bug.cgi?id=2267761
https://bugzilla.redhat.com/show_bug.cgi?id=2267788
https://bugzilla.redhat.com/show_bug.cgi?id=2267795
https://bugzilla.redhat.com/show_bug.cgi?id=2269189
https://bugzilla.redhat.com/show_bug.cgi?id=2269217
https://bugzilla.redhat.com/show_bug.cgi?id=2270080
https://bugzilla.redhat.com/show_bug.cgi?id=2270118
https://bugzilla.redhat.com/show_bug.cgi?id=2270883
https://issues.redhat.com/browse/RHEL-15897
https://issues.redhat.com/browse/RHEL-15937
https://issues.redhat.com/browse/RHEL-16024
https://issues.redhat.com/browse/RHEL-17986
https://issues.redhat.com/browse/RHEL-19081
https://issues.redhat.com/browse/RHEL-2376
https://issues.redhat.com/browse/RHEL-2421
https://issues.redhat.com/browse/RHEL-2466
https://issues.redhat.com/browse/RHEL-2907
https://issues.redhat.com/browse/RHEL-3923
https://issues.redhat.com/browse/RHEL-5226
https://issues.redhat.com/browse/RHEL-5228
https://issues.redhat.com/browse/RHEL-6012
https://issues.redhat.com/browse/RHEL-7936
https://issues.redhat.com/browse/RHEL-9127