RHSA-2024:6268 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address (CVE-2024-26946)
• kernel: netfilter: bridge: replace physindev with physinif in nf_bridge_info (CVE-2024-35839)
• kernel: bpf, sockmap: Prevent lock inversion deadlock in map delete elem (CVE-2024-35895)
• kernel: x86/coco: Require seeding RNG with RDRAND on CoCo systems (CVE-2024-35875)
• kernel: gfs2: Fix potential glock use-after-free on unmount (CVE-2024-38570)
• kernel: bnxt_re: avoid shift undefined behavior in bnxt_qplib_alloc_init_hwq (CVE-2024-38540)
• kernel: ionic: fix use after netif_napi_del() (CVE-2024-39502)
• kernel: mm/huge_memory: don't unpoison huge_zero_folio (CVE-2024-40914)
• kernel: dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list (CVE-2024-40956)
• kernel: scsi: qedi: Fix crash while reading debugfs attribute (CVE-2024-40978)
• kernel: tipc: force a dst refcount before doing decryption (CVE-2024-40983)
• kernel: ppp: reject claimed-as-LCP but actually malformed packets (CVE-2024-41044)
• kernel: Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again" (CVE-2024-42102)
• kernel: mm: avoid overflows in dirty throttling logic (CVE-2024-42131)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.2 x86_64

Fixes

• BZ - 2278206 - CVE-2024-26946 kernel: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address
• BZ - 2281284 - CVE-2024-35839 kernel: netfilter: bridge: replace physindev with physinif in nf_bridge_info
• BZ - 2281677 - CVE-2024-35895 kernel: bpf, sockmap: Prevent lock inversion deadlock in map delete elem
• BZ - 2281727 - CVE-2024-35875 kernel: x86/coco: Require seeding RNG with RDRAND on CoCo systems
• BZ - 2293423 - CVE-2024-38570 kernel: gfs2: Fix potential glock use-after-free on unmount
• BZ - 2293459 - CVE-2024-38540 kernel: bnxt_re: avoid shift undefined behavior in bnxt_qplib_alloc_init_hwq
• BZ - 2297474 - CVE-2024-39502 kernel: ionic: fix use after netif_napi_del()
• BZ - 2297498 - CVE-2024-40914 kernel: mm/huge_memory: don't unpoison huge_zero_folio
• BZ - 2297540 - CVE-2024-40956 kernel: dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list
• BZ - 2297562 - CVE-2024-40978 kernel: scsi: qedi: Fix crash while reading debugfs attribute
• BZ - 2297567 - CVE-2024-40983 kernel: tipc: force a dst refcount before doing decryption
• BZ - 2300414 - CVE-2024-41044 kernel: ppp: reject claimed-as-LCP but actually malformed packets
• BZ - 2301465 - CVE-2024-42102 kernel: Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again"
• BZ - 2301496 - CVE-2024-42131 kernel: mm: avoid overflows in dirty throttling logic

CVEs

• CVE-2024-26946
• CVE-2024-35839
• CVE-2024-35875
• CVE-2024-35895
• CVE-2024-38540
• CVE-2024-38570
• CVE-2024-39502
• CVE-2024-40914
• CVE-2024-40956
• CVE-2024-40978
• CVE-2024-40983
• CVE-2024-41044
• CVE-2024-42102
• CVE-2024-42131

References

• https://access.redhat.com/security/updates/classification/#moderate