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TI-2025-26939 Aliases CVE-2025-40269GHSA-7g56-9fh3-wcxw

ALSA: usb-audio: Fix potential overflow of PCM transfer buffer

Priority LOW 33Published · 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: 44 fixed, 3 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: usb-audio: Fix potential overflow of PCM transfer buffer The PCM stream data in USB-audio driver is transferred over USB URB packet buffers, and each packet size is determined dynamically. The packet sizes are limited by some factors such as wMaxPacketSize USB descriptor. OTOH, in the current code, the actually used packet sizes are determined only by the rate and the PPS, which may be bigger than the size limit above. This results in a buffer overflow, as reported by syzbot. Basically when the limit is smaller than the calculated packet size, it implies that something is wrong, most likely a weird USB descriptor. So the best option would be just to return an error at the parameter setup time before doing any further operations. This patch introduces such a sanity check, and returns -EINVAL when the packet size is greater than maxpacksize. The comparison with ep->packsize[1] alone should suffice since it's always equal or greater than ep->packsize[0].

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0019 8th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.4.230, 4.9.230, 4.14.188 +10Red Hat: 14 advisoriesRed Hat: 44 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.4.229 to before 4.4.230; 4.9.229 to before 4.9.230; 4.14.186 to before 4.14.188; 4.19.130 to before 4.19.132; 5.4.49 to before 5.4.51; 5.7.6 to before 5.7.84.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8Patch availableCNA
LinuxLinux5.8 and later4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18Patch availableCNA
  • Linux VendorLinux Affected 4.4.229 to before 4.4.230; 4.9.229 to before 4.9.230; 4.14.186 to before 4.14.188; 4.19.130 to before 4.19.132; 5.4.49 to before 5.4.51; 5.7.6 to before 5.7.8 Fixed in 4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8 Patch available CNA
  • Linux VendorLinux Affected 5.8 and later Fixed in 4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18 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 4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8
  • Fix · CNA Linux (Linux) Fixed in 4.4.230, 4.9.230, 4.14.188, 4.19.132, 5.4.51, 5.7.8, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59, 6.17.9, 6.18

Red Hat 14 advisories

  • RHSA-2026:5821 Released 2026-03-25 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.187.1.el8_4, kernel-4.18.0-305.187.1.el8_4, kernel-abi-stablelists-4.18.0-305.187.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.187.1.el8_4, kernel-4.18.0-305.187.1.el8_4, kernel-abi-stablelists-4.18.0-305.187.1.el8_4 +14
  • RHSA-2026:4243 Released 2026-03-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.183.1.el8_6, kernel-4.18.0-372.183.1.el8_6, kernel-abi-stablelists-4.18.0-372.183.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.183.1.el8_6, kernel-4.18.0-372.183.1.el8_6, kernel-abi-stablelists-4.18.0-372.183.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.183.1.el8_6, kernel-4.18.0-372.183.1.el8_6, kernel-abi-stablelists-4.18.0-372.183.1.el8_6 +14
  • RHSA-2026:4242 Released 2026-03-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.132.1.el8_8, kernel-4.18.0-477.132.1.el8_8, kernel-abi-stablelists-4.18.0-477.132.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.132.1.el8_8, kernel-4.18.0-477.132.1.el8_8, kernel-abi-stablelists-4.18.0-477.132.1.el8_8 +14
Show 11 more Red Hat advisories
  • RHSA-2026:3375 Released 2026-02-25 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.167.1.rt21.239.el9_0, kernel-rt-core-5.14.0-70.167.1.rt21.239.el9_0, kernel-rt-debug-5.14.0-70.167.1.rt21.239.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.167.1.rt21.239.el9_0, kernel-rt-core-5.14.0-70.167.1.rt21.239.el9_0, kernel-rt-debug-5.14.0-70.167.1.rt21.239.el9_0 +7
  • RHSA-2026:3358 Released 2026-02-25 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.158.1.rt14.443.el9_2, kernel-rt-core-5.14.0-284.158.1.rt14.443.el9_2, kernel-rt-debug-5.14.0-284.158.1.rt14.443.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.158.1.rt14.443.el9_2, kernel-rt-core-5.14.0-284.158.1.rt14.443.el9_2, kernel-rt-debug-5.14.0-284.158.1.rt14.443.el9_2 +11
  • RHSA-2026:3293 Released 2026-02-25 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.167.1.el9_0, kernel-debug-devel-matched-5.14.0-70.167.1.el9_0, kernel-devel-5.14.0-70.167.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.167.1.el9_0, kernel-5.14.0-70.167.1.el9_0, kernel-abi-stablelists-5.14.0-70.167.1.el9_0 +14
  • RHSA-2026:3267 Released 2026-02-25 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.158.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.158.1.el9_2, kernel-64k-devel-5.14.0-284.158.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.158.1.el9_2, kernel-5.14.0-284.158.1.el9_2, kernel-64k-5.14.0-284.158.1.el9_2 +29
  • RHSA-2026:2766 Released 2026-02-17 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.111.1.el9_4, libperf-5.14.0-427.111.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.111.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.111.1.el9_4, kernel-64k-devel-5.14.0-427.111.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.111.1.el9_4, kernel-5.14.0-427.111.1.el9_4, kernel-64k-5.14.0-427.111.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.111.1.el9_4, kernel-rt-core-5.14.0-427.111.1.el9_4, kernel-rt-debug-5.14.0-427.111.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.111.1.el9_4, kernel-rt-core-5.14.0-427.111.1.el9_4, kernel-rt-debug-5.14.0-427.111.1.el9_4 +11
  • RHSA-2026:2761 Released 2026-02-16 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.60.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.60.1.el10_0, kernel-64k-devel-6.12.0-55.60.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.60.1.el10_0, kernel-64k-6.12.0-55.60.1.el10_0, kernel-64k-core-6.12.0-55.60.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.60.1.el10_0, libperf-6.12.0-55.60.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.60.1.el10_0, kernel-rt-64k-6.12.0-55.60.1.el10_0, kernel-rt-64k-core-6.12.0-55.60.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.60.1.el10_0, kernel-rt-core-6.12.0-55.60.1.el10_0, kernel-rt-debug-6.12.0-55.60.1.el10_0 +11
  • RHSA-2026:2759 Released 2026-02-16 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.89.1.el9_6, libperf-5.14.0-570.89.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.89.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.89.1.el9_6, kernel-64k-devel-5.14.0-570.89.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.89.1.el9_6, kernel-64k-5.14.0-570.89.1.el9_6, kernel-64k-core-5.14.0-570.89.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.89.1.el9_6, kernel-rt-64k-5.14.0-570.89.1.el9_6, kernel-rt-64k-core-5.14.0-570.89.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.89.1.el9_6, kernel-rt-core-5.14.0-570.89.1.el9_6, kernel-rt-debug-5.14.0-570.89.1.el9_6 +11
  • RHSA-2026:2721 Released 2026-02-16 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.38.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.38.1.el10_1, kernel-64k-devel-6.12.0-124.38.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.38.1.el10_1, kernel-64k-6.12.0-124.38.1.el10_1, kernel-64k-core-6.12.0-124.38.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.38.1.el10_1, libperf-6.12.0-124.38.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.38.1.el10_1, kernel-rt-64k-6.12.0-124.38.1.el10_1, kernel-rt-64k-core-6.12.0-124.38.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.38.1.el10_1, kernel-rt-core-6.12.0-124.38.1.el10_1, kernel-rt-debug-6.12.0-124.38.1.el10_1 +9
  • RHSA-2026:2378 Released 2026-02-10 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-core-4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-4.18.0-553.104.1.rt7.445.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-core-4.18.0-553.104.1.rt7.445.el8_10, kernel-rt-debug-4.18.0-553.104.1.rt7.445.el8_10 +7
  • RHSA-2026:2264 Released 2026-02-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.104.1.el8_10, kernel-4.18.0-553.104.1.el8_10, kernel-abi-stablelists-4.18.0-553.104.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.104.1.el8_10
  • RHSA-2026:2212 Released 2026-02-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.30.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.30.1.el9_7, kernel-64k-devel-5.14.0-611.30.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.30.1.el9_7, kernel-64k-5.14.0-611.30.1.el9_7, kernel-64k-core-5.14.0-611.30.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.30.1.el9_7, libperf-5.14.0-611.30.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.30.1.el9_7, kernel-rt-64k-5.14.0-611.30.1.el9_7, kernel-rt-64k-core-5.14.0-611.30.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.30.1.el9_7, kernel-rt-core-5.14.0-611.30.1.el9_7, kernel-rt-debug-5.14.0-611.30.1.el9_7 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:2766
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:2759
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:2721
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:2212
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:3293
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:3267
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:2761
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:2766
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:2759
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:2721
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:2264
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:2212
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:5821
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:4243
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:4243
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:4242
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:3293
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:3267
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:2761
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:2766
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:2759
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:5821
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:4243
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:4242
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:2264
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:2721
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:2212
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:2761
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:2378
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:3375
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:2378
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:2721
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:2212
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:3375
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:3358
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:2761
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2026:2766
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:2759
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:2721
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:2212
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:3358
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:2761
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2026:2766
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:2759
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40269
  2. 2026-10-03 Alias added: GHSA-7g56-9fh3-wcxw

References

Other 13

  • 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