Read the docs
TI-2023-00252 Aliases CVE-2023-0266GHSA-h8jm-3c82-6vvq

Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

Priority CRITICAL 94Exploited in the wildCWE-416Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · High · High
Fix status
Fixed

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

Summary

A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e

Why it matters now

Exploitation Active In CISA KEV since 2023-03-30CISA due date 2023-04-20
EPSS 0.03702 89th percentileScored 2026-11-07
Fix Fixed Red Hat: 20 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
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

No affected products listed by the sources yet.

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14 to before 4.14.303; 4.15 to before 4.19.270; 4.20 to before 5.4.229; 5.5 to before 5.10.163; 5.11 to before 5.15.88; 5.16 to before 6.1.6VulnerableLinux
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 4.14.303; 4.15 to before 4.19.270; 4.20 to before 5.4.229; 5.5 to before 5.10.163; 5.11 to before 5.15.88; 5.16 to before 6.1.6 Vulnerable ·Linux

Remediation

Red Hat 20 advisories

  • RHSA-2023:1677 Released 2023-04-10 · Red Hat rating Important
    Red Hat Virtualization Host 4.4.z SP 1 security update batch#5 (oVirt-4.5.3-5)
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host-4.5.3-202304051438_8.6, redhat-virtualization-host-image-update-4.5.3-202304051438_8.6
  • RHSA-2023:1666 Released 2023-04-05 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) kpatch-patch-4_18_0-193_100_1-1-1.el8_2, kpatch-patch-4_18_0-193_91_1-1-5.el8_2, kpatch-patch-4_18_0-193_93_1-1-4.el8_2 +2
  • RHSA-2023:1659 Released 2023-04-05 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-425_10_1-1-4.el8_7, kpatch-patch-4_18_0-425_13_1-1-2.el8_7, kpatch-patch-4_18_0-425_3_1-1-6.el8
Show 17 more Red Hat advisories
  • RHSA-2023:1662 Released 2023-04-05 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) kpatch-patch-4_18_0-305_65_1-1-5.el8_4, kpatch-patch-4_18_0-305_71_1-1-4.el8_4, kpatch-patch-4_18_0-305_72_1-1-3.el8_4 +2
  • RHSA-2023:1660 Released 2023-04-05 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) kpatch-patch-4_18_0-372_26_1-1-6.el8_6, kpatch-patch-4_18_0-372_32_1-1-5.el8_6, kpatch-patch-4_18_0-372_36_1-1-4.el8_6 +3
  • RHSA-2023:1566 Released 2023-04-04 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-425.19.2.el8_7
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-425.19.2.el8_7, kernel-4.18.0-425.19.2.el8_7, kernel-abi-stablelists-4.18.0-425.19.2.el8_7 +19
  • RHSA-2023:1590 Released 2023-04-04 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) kpatch-patch-4_18_0-147_74_1-1-4.el8_1, kpatch-patch-4_18_0-147_76_1-1-3.el8_1, kpatch-patch-4_18_0-147_77_1-1-3.el8_1 +2
  • RHSA-2023:1588 Released 2023-04-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) bpftool-4.18.0-147.81.1.el8_1, kernel-4.18.0-147.81.1.el8_1, kernel-abi-whitelists-4.18.0-147.81.1.el8_1 +14
  • RHSA-2023:1584 Released 2023-04-04 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-425.19.2.rt7.230.el8_7, kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7, kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7 +9
    • Red Hat Enterprise Linux for Real Time (v. 8) kernel-rt-4.18.0-425.19.2.rt7.230.el8_7, kernel-rt-core-4.18.0-425.19.2.rt7.230.el8_7, kernel-rt-debug-4.18.0-425.19.2.rt7.230.el8_7 +7
  • RHSA-2023:1557 Released 2023-04-04 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.4) bpftool-4.18.0-305.86.2.el8_4, kernel-4.18.0-305.86.2.el8_4, kernel-abi-stablelists-4.18.0-305.86.2.el8_4 +19
    • Red Hat Enterprise Linux CRB EUS (v.8.4) kernel-tools-libs-devel-4.18.0-305.86.2.el8_4
  • RHSA-2023:1559 Released 2023-04-04 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.105.1.el8_2, kernel-4.18.0-193.105.1.el8_2, kernel-abi-whitelists-4.18.0-193.105.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) bpftool-4.18.0-193.105.1.el8_2, kernel-4.18.0-193.105.1.el8_2, kernel-abi-whitelists-4.18.0-193.105.1.el8_2 +14
    • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) bpftool-4.18.0-193.105.1.el8_2, kernel-4.18.0-193.105.1.el8_2, kernel-abi-whitelists-4.18.0-193.105.1.el8_2 +14
  • RHSA-2023:1554 Released 2023-04-04 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.8.6) kernel-tools-libs-devel-4.18.0-372.51.1.el8_6
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) bpftool-4.18.0-372.51.1.el8_6, kernel-4.18.0-372.51.1.el8_6, kernel-abi-stablelists-4.18.0-372.51.1.el8_6 +19
    • Red Hat Virtualization 4 Hypervisor for RHEL 8 kernel-devel-4.18.0-372.51.1.el8_6, perf-4.18.0-372.51.1.el8_6
  • RHSA-2023:1560 Released 2023-04-04 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time TUS (v. 8.2) kernel-rt-4.18.0-193.105.1.rt13.156.el8_2, kernel-rt-core-4.18.0-193.105.1.rt13.156.el8_2, kernel-rt-debug-4.18.0-193.105.1.rt13.156.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) kernel-rt-4.18.0-193.105.1.rt13.156.el8_2, kernel-rt-core-4.18.0-193.105.1.rt13.156.el8_2, kernel-rt-debug-4.18.0-193.105.1.rt13.156.el8_2 +9
  • RHSA-2023:1556 Released 2023-04-04 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux NFV EUS (v.8.4) kernel-rt-4.18.0-305.86.2.rt7.160.el8_4, kernel-rt-core-4.18.0-305.86.2.rt7.160.el8_4, kernel-rt-debug-4.18.0-305.86.2.rt7.160.el8_4 +9
    • Red Hat Enterprise Linux RT EUS (v.8.4) kernel-rt-4.18.0-305.86.2.rt7.160.el8_4, kernel-rt-core-4.18.0-305.86.2.rt7.160.el8_4, kernel-rt-debug-4.18.0-305.86.2.rt7.160.el8_4 +7
  • RHSA-2023:1470 Released 2023-03-27 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-162.22.2.el9_1
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-debug-devel-5.14.0-162.22.2.el9_1, kernel-debug-devel-matched-5.14.0-162.22.2.el9_1, kernel-devel-5.14.0-162.22.2.el9_1 +5
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-5.14.0-162.22.2.el9_1, kernel-5.14.0-162.22.2.el9_1, kernel-abi-stablelists-5.14.0-162.22.2.el9_1 +14
  • RHSA-2023:1471 Released 2023-03-27 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-162_12_1-1-2.el9_1, kpatch-patch-5_14_0-162_18_1-1-1.el9_1, kpatch-patch-5_14_0-162_6_1-1-3.el9_1
  • RHSA-2023:1469 Released 2023-03-27 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-162.22.2.rt21.186.el9_1, kernel-rt-core-5.14.0-162.22.2.rt21.186.el9_1, kernel-rt-debug-5.14.0-162.22.2.rt21.186.el9_1 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-162.22.2.rt21.186.el9_1, kernel-rt-core-5.14.0-162.22.2.rt21.186.el9_1, kernel-rt-debug-5.14.0-162.22.2.rt21.186.el9_1 +9
  • RHSA-2023:1435 Released 2023-03-23 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) kpatch-patch-5_14_0-70_22_1-1-6.el9_0, kpatch-patch-5_14_0-70_26_1-1-5.el9_0, kpatch-patch-5_14_0-70_30_1-1-3.el9_0 +2
  • RHSA-2023:1202 Released 2023-03-14 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.0) kernel-tools-libs-devel-5.14.0-70.49.1.el9_0
    • Red Hat Enterprise Linux AppStream EUS (v.9.0) kernel-debug-devel-5.14.0-70.49.1.el9_0, kernel-debug-devel-matched-5.14.0-70.49.1.el9_0, kernel-devel-5.14.0-70.49.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS EUS (v.9.0) bpftool-5.14.0-70.49.1.el9_0, kernel-5.14.0-70.49.1.el9_0, kernel-abi-stablelists-5.14.0-70.49.1.el9_0 +14
  • RHSA-2023:1203 Released 2023-03-14 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time EUS (v.9.0) kernel-rt-5.14.0-70.49.1.rt21.120.el9_0, kernel-rt-core-5.14.0-70.49.1.rt21.120.el9_0, kernel-rt-debug-5.14.0-70.49.1.rt21.120.el9_0 +7
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) kernel-rt-5.14.0-70.49.1.rt21.120.el9_0, kernel-rt-core-5.14.0-70.49.1.rt21.120.el9_0, kernel-rt-debug-5.14.0-70.49.1.rt21.120.el9_0 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2023:1566
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2023:1470
Red Hat CodeReady Linux Builder EUS (v.8.6)Fixed RHSA-2023:1554
Red Hat CodeReady Linux Builder EUS (v.9.0)Fixed RHSA-2023:1202
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:1470
Red Hat Enterprise Linux AppStream EUS (v.9.0)Fixed RHSA-2023:1202
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:1566, RHSA-2023:1659
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:1470, RHSA-2023:1471
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2023:1559
Red Hat Enterprise Linux BaseOS E4S (v. 8.1)Fixed RHSA-2023:1588, RHSA-2023:1590
Red Hat Enterprise Linux BaseOS E4S (v. 8.2)Fixed RHSA-2023:1559, RHSA-2023:1666
Red Hat Enterprise Linux BaseOS EUS (v.8.4)Fixed RHSA-2023:1557, RHSA-2023:1662
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2023:1554, RHSA-2023:1660
Red Hat Enterprise Linux BaseOS EUS (v.9.0)Fixed RHSA-2023:1202, RHSA-2023:1435
Red Hat Enterprise Linux BaseOS TUS (v. 8.2)Fixed RHSA-2023:1559
Red Hat Enterprise Linux CRB EUS (v.8.4)Fixed RHSA-2023:1557
Red Hat Enterprise Linux NFV EUS (v.8.4)Fixed RHSA-2023:1556
Red Hat Enterprise Linux RT EUS (v.8.4)Fixed RHSA-2023:1556
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2023:1469
Red Hat Enterprise Linux Real Time EUS (v.9.0)Fixed RHSA-2023:1203
Red Hat Enterprise Linux Real Time TUS (v. 8.2)Fixed RHSA-2023:1560
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2023:1584
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2023:1469
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)Fixed RHSA-2023:1203
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2)Fixed RHSA-2023:1560
Red Hat Enterprise Linux for Real Time (v. 8)Fixed RHSA-2023:1584
Red Hat Virtualization 4 Hypervisor for RHEL 8Fixed RHSA-2023:1554, RHSA-2023:1677
Not affected: 3 products
  • RHEL 8-based RHEV-H for RHEV 4 (build requirements)
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2023-03-30 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2023-0266
  3. 2026-10-03 Alias added: GHSA-h8jm-3c82-6vvq

References

Patch 3

Advisory 1

  • 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-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
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

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