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TI-2023-30037 Aliases CVE-2023-53751GHSA-7gp2-6wc7-fw9f

cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

Priority MEDIUM 42Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 23 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: cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs.

Why it matters now

EPSS 0.00415 36th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.28, 6.2.15, 6.3.2 +1Red Hat: 10 advisoriesRed Hat: 23 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.0 and later6.1.28, 6.2.15, 6.3.2, 6.4Patch availableCNA
  • Linux VendorLinux Affected 5.0 and later Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4 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 6.1.28, 6.2.15, 6.3.2, 6.4

Red Hat 10 advisories

  • RHSA-2026:2577 Released 2026-02-11 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-5.14.0-70.165.1.rt21.237.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core-5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-5.14.0-70.165.1.rt21.237.el9_0 +7
  • RHSA-2026:2573 Released 2026-02-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.165.1.el9_0, kernel-debug-devel-matched-5.14.0-70.165.1.el9_0, kernel-devel-5.14.0-70.165.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.165.1.el9_0, kernel-5.14.0-70.165.1.el9_0, kernel-abi-stablelists-5.14.0-70.165.1.el9_0 +14
  • RHSA-2026:2535 Released 2026-02-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.128.1.el8_8, kernel-4.18.0-477.128.1.el8_8, kernel-abi-stablelists-4.18.0-477.128.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.128.1.el8_8, kernel-4.18.0-477.128.1.el8_8, kernel-abi-stablelists-4.18.0-477.128.1.el8_8 +14
Show 7 more Red Hat advisories
  • RHSA-2026:2490 Released 2026-02-11 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.179.1.el8_6, kernel-4.18.0-372.179.1.el8_6, kernel-abi-stablelists-4.18.0-372.179.1.el8_6 +14
  • RHSA-2026:1946 Released 2026-02-04 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-5.14.0-284.155.1.rt14.440.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core-5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-5.14.0-284.155.1.rt14.440.el9_2 +11
  • RHSA-2026:1909 Released 2026-02-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.155.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.155.1.el9_2, kernel-64k-devel-5.14.0-284.155.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.155.1.el9_2, kernel-5.14.0-284.155.1.el9_2, kernel-64k-5.14.0-284.155.1.el9_2 +29
  • RHSA-2026:1886 Released 2026-02-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.184.1.el8_4, kernel-4.18.0-305.184.1.el8_4, kernel-abi-stablelists-4.18.0-305.184.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.184.1.el8_4, kernel-4.18.0-305.184.1.el8_4, kernel-abi-stablelists-4.18.0-305.184.1.el8_4 +14
  • RHSA-2026:1512 Released 2026-01-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.183.1.el8_2, kernel-4.18.0-193.183.1.el8_2, kernel-abi-whitelists-4.18.0-193.183.1.el8_2 +14
  • RHSA-2025:19447 Released 2025-11-03 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.82.1.el8_10, kernel-4.18.0-553.82.1.el8_10, kernel-abi-stablelists-4.18.0-553.82.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.82.1.el8_10
  • RHSA-2024:2394 Released 2024-04-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-427.13.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.13.1.el9_4, kernel-64k-devel-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS (v. 9) bpftool-7.3.0-427.13.1.el9_4, kernel-5.14.0-427.13.1.el9_4, kernel-64k-5.14.0-427.13.1.el9_4 +29
    • Red Hat Enterprise Linux CRB (v. 9) kernel-tools-libs-devel-5.14.0-427.13.1.el9_4, libperf-5.14.0-427.13.1.el9_4
    • Red Hat Enterprise Linux NFV (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +11
    • Red Hat Enterprise Linux RT (v. 9) kernel-rt-5.14.0-427.13.1.el9_4, kernel-rt-core-5.14.0-427.13.1.el9_4, kernel-rt-debug-5.14.0-427.13.1.el9_4 +9

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 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:2573
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:1909
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2025:19447
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2026:1512
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:1886
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:2535
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:2573
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:1909
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:1886
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:2490
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:2535
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2025:19447
Red Hat Enterprise Linux CRB (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux NFV (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:2577
Red Hat Enterprise Linux RT (v. 9)Fixed RHSA-2024:2394
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:2577
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:1946
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:1946
Not affected: 3 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-53751
  2. 2026-10-03 Alias added: GHSA-7gp2-6wc7-fw9f

References

Other 4

  • 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