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TI-2026-52424 Aliases CVE-2026-74641GHSA-mrvc-mw2v-9ww4

ALSA: usx2y: bound the hwdep mmap fault offset

Priority LOW 35Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 40 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: bound the hwdep mmap fault offset snd_us428ctls_vm_fault() turns the faulting page offset into a kernel address with no bound of any kind: offset = vmf->pgoff << PAGE_SHIFT; vaddr = (char *)(...)->us428ctls_sharedmem + offset; page = virt_to_page(vaddr); get_page(page); vmf->page = page; return 0; snd_us428ctls_mmap() checks only the length of the mapping, never the offset, and us428ctls_sharedmem is a single page from alloc_pages_exact(). For a character device file_mmap_size_max() returns ULONG_MAX, so the mm layer imposes no ceiling either. Every page offset above zero resolves to a struct page outside the object, and the handler installs it into the caller's address space read-write; the vma is not marked read-only. The caller picks the page frame with a single mmap() argument and gets read-write access to a page of kernel memory it does not own; an offset that lands in an unpopulated vmemmap region oopses instead. A process that can open the hwdep node of an attached US-X2Y reaches this after loading the FPGA image through the same node; no capability check is involved. On 7.2.0-rc5 (arm64), mmap() with a large offset: Unable to handle kernel paging request at virtual address fffffdffc45d5ac8 pc : snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y] Call trace: snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y] __do_fault __handle_mm_fault handle_mm_fault el0_da Reject any offset outside the shared region. The pcm hwdep handler in usx2yhwdeppcm.c computes its address the same way and needs the same bound. Discovered by XBOW, triaged by Baul Lee <[email protected]>

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.266, 5.15.216, 6.1.183 +5Red Hat: 12 advisoriesRed Hat: 40 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux2.6.12 and later5.10.266, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9, 7.2Patch availableCNA
  • Linux VendorLinux Affected 2.6.12 and later Fixed in 5.10.266, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.266, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9, 7.2

Red Hat 12 advisories

  • RHSA-2026:94996 Released 2026-11-04 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.227.1.el8_6, kernel-4.18.0-372.227.1.el8_6, kernel-abi-stablelists-4.18.0-372.227.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.227.1.el8_6, kernel-4.18.0-372.227.1.el8_6, kernel-abi-stablelists-4.18.0-372.227.1.el8_6 +14
  • RHSA-2026:94596 Released 2026-11-03 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.217.1.el8_4, kernel-4.18.0-305.217.1.el8_4, kernel-abi-stablelists-4.18.0-305.217.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.217.1.el8_4, kernel-4.18.0-305.217.1.el8_4, kernel-abi-stablelists-4.18.0-305.217.1.el8_4 +14
  • RHSA-2026:93047 Released 2026-10-30 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-core-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-debug-5.14.0-284.200.1.rt14.485.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-core-5.14.0-284.200.1.rt14.485.el9_2, kernel-rt-debug-5.14.0-284.200.1.rt14.485.el9_2 +11
Show 9 more Red Hat advisories
  • RHSA-2026:92997 Released 2026-10-30 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.177.1.el8_8, kernel-4.18.0-477.177.1.el8_8, kernel-abi-stablelists-4.18.0-477.177.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.177.1.el8_8, kernel-4.18.0-477.177.1.el8_8, kernel-abi-stablelists-4.18.0-477.177.1.el8_8 +14
  • RHSA-2026:92993 Released 2026-10-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.200.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.200.1.el9_2, kernel-64k-devel-5.14.0-284.200.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.200.1.el9_2, kernel-5.14.0-284.200.1.el9_2, kernel-64k-5.14.0-284.200.1.el9_2 +29
  • RHSA-2026:91492 Released 2026-10-28 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.152.1.el9_6, libperf-5.14.0-570.152.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.152.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.152.1.el9_6, kernel-64k-devel-5.14.0-570.152.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.152.1.el9_6, kernel-64k-5.14.0-570.152.1.el9_6, kernel-64k-core-5.14.0-570.152.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.152.1.el9_6, kernel-rt-64k-5.14.0-570.152.1.el9_6, kernel-rt-64k-core-5.14.0-570.152.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.152.1.el9_6, kernel-rt-core-5.14.0-570.152.1.el9_6, kernel-rt-debug-5.14.0-570.152.1.el9_6 +11
  • RHSA-2026:91489 Released 2026-10-28 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.158.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.158.1.el9_4, kernel-64k-devel-5.14.0-427.158.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.158.1.el9_4, kernel-5.14.0-427.158.1.el9_4, kernel-64k-5.14.0-427.158.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.158.1.el9_4, kernel-rt-core-5.14.0-427.158.1.el9_4, kernel-rt-debug-5.14.0-427.158.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.158.1.el9_4, kernel-rt-core-5.14.0-427.158.1.el9_4, kernel-rt-debug-5.14.0-427.158.1.el9_4 +11
  • RHSA-2026:88687 Released 2026-10-23 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.113.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.113.1.el10_0, kernel-64k-devel-6.12.0-55.113.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.113.1.el10_0, kernel-64k-6.12.0-55.113.1.el10_0, kernel-64k-core-6.12.0-55.113.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.113.1.el10_0, libperf-6.12.0-55.113.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.113.1.el10_0, kernel-rt-64k-6.12.0-55.113.1.el10_0, kernel-rt-64k-core-6.12.0-55.113.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.113.1.el10_0, kernel-rt-core-6.12.0-55.113.1.el10_0, kernel-rt-debug-6.12.0-55.113.1.el10_0 +11
  • RHSA-2026:83207 Released 2026-10-15 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.66.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.66.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.66.1.el10_2, kernel-64k-devel-6.12.0-211.66.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.66.1.el10_2, kernel-64k-6.12.0-211.66.1.el10_2, kernel-64k-core-6.12.0-211.66.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.66.1.el10_2, libperf-6.12.0-211.66.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.66.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.66.1.el10_2, kernel-rt-64k-6.12.0-211.66.1.el10_2, kernel-rt-64k-core-6.12.0-211.66.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.66.1.el10_2, kernel-rt-core-6.12.0-211.66.1.el10_2, kernel-rt-debug-6.12.0-211.66.1.el10_2 +9
  • RHSA-2026:83156 Released 2026-10-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.58.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.58.1.el9_8, kernel-64k-devel-5.14.0-687.58.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.58.1.el9_8, kernel-64k-5.14.0-687.58.1.el9_8, kernel-64k-core-5.14.0-687.58.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.58.1.el9_8, libperf-5.14.0-687.58.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.58.1.el9_8, kernel-rt-64k-5.14.0-687.58.1.el9_8, kernel-rt-64k-core-5.14.0-687.58.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.58.1.el9_8, kernel-rt-core-5.14.0-687.58.1.el9_8, kernel-rt-debug-5.14.0-687.58.1.el9_8 +9
  • RHSA-2026:83157 Released 2026-10-14 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.174.1.el8_10, kernel-4.18.0-553.174.1.el8_10, kernel-abi-stablelists-4.18.0-553.174.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.174.1.el8_10
  • RHSA-2026:83159 Released 2026-10-14 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.174.1.rt7.515.el8_10, kernel-rt-core-4.18.0-553.174.1.rt7.515.el8_10, kernel-rt-debug-4.18.0-553.174.1.rt7.515.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.174.1.rt7.515.el8_10, kernel-rt-core-4.18.0-553.174.1.rt7.515.el8_10, kernel-rt-debug-4.18.0-553.174.1.rt7.515.el8_10 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:83207
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:83156
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:92993
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:83157
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:83156
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:94596
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:94996
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:92997
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:92993
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:94596
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:94996
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:92997
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:83157
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:83156
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:83159
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:83159
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:83156
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:93047
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:91492
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:83207
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:83156
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:93047
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:91489
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:88687
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:91492
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74641
  2. 2026-10-03 Alias added: GHSA-mrvc-mw2v-9ww4
  3. 2026-10-16 Fix available: RHSA-2026:83159 · Red Hat
  4. 2026-10-16 Fix available: RHSA-2026:83156 · Red Hat
  5. 2026-10-16 Fix available: RHSA-2026:83157 · Red Hat
  6. 2026-10-16 Fix available: RHSA-2026:83207 · Red Hat
  7. 2026-10-16 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) +13 · Red Hat
  8. 2026-10-18 CISA SSVC decision points changed
  9. 2026-10-24 Fix available: RHSA-2026:88687 · Red Hat
  10. 2026-10-24 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) +2 · Red Hat
  11. 2026-10-29 Fix available: RHSA-2026:91489 · Red Hat
  12. 2026-10-30 Fix available: RHSA-2026:91492 · Red Hat
  13. 2026-10-30 Fix available: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6) +6 · Red Hat
  14. 2026-10-30 Fix available: RHSA-2026:93047 · Red Hat
  15. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS E4S (v.9.2) +3 · Red Hat
  16. 2026-10-31 Fix available: RHSA-2026:92993 · Red Hat
  17. 2026-10-31 Fix available: RHSA-2026:92997 · Red Hat
  18. 2026-11-03 Fix available: RHSA-2026:94596 · Red Hat
  19. 2026-11-03 Fix available: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · Red Hat
  20. 2026-11-04 Fix available: RHSA-2026:94996 · Red Hat
  21. 2026-11-04 Fix available: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) · Red Hat

References

Other 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences