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Fencer Vulns
critical 9.1

CVE-2022-49058 in the critical feed json

cifs: potential buffer overflow in handling symlinks

published 2025-02-26 20 mo ago modified 2026-08-05 3 mo ago also EUVD-2022-55146

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

cifs: potential buffer overflow in handling symlinks

Smatch printed a warning: arch/x86/crypto/poly1305_glue.c:198 poly1305_update_arch() error: __memcpy() 'dctx->buf' too small (16 vs u32max)

It's caused because Smatch marks 'link_len' as untrusted since it comes from sscanf(). Add a check to ensure that 'link_len' is not larger than the size of the 'link_str' buffer.

Patch / fix

  • Linux Linux 4.9.311, 4.14.276, 4.19.239, 5.4.190, 5.10.112, 5.15.35, 5.17.4, 5.18
  • linux Debian 14, Debian 13, Debian 12 5.17.6-1

debian advisories DEBIAN-CVE-2022-49058

  • linux Ubuntu 18.04 LTS 4.15.0-189.200
  • linux Ubuntu 20.04 LTS 5.4.0-122.138
  • linux Ubuntu 22.04 LTS 5.15.0-37.39
  • linux-aws Ubuntu 18.04 LTS 4.15.0-1137.148
  • linux-aws Ubuntu 20.04 LTS 5.4.0-1081.88
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1011.14
  • linux-gcp Ubuntu 20.04 LTS 5.4.0-1084.92
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1008.12

ubuntu advisories UBUNTU-CVE-2022-49058

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-553.62.1.el8_10
  • perf RHEL 8 4.18.0-553.62.1.el8_10
  • bpftool RHEL 8 4.18.0-553.62.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.62.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.62.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.62.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.62.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.62.1.el8_10

red hat advisories RHSA-2025:13061RHSA-2025:13029RHSA-2025:13030RHSA-2025:12623RHSA-2025:12238RHSA-2025:11570

  • kernel-64kb SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS, Enterprise Storage 7.1 5.3.18-150300.59.201.1
  • kernel-syms SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-source SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-default SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +5 more 5.3.18-150300.59.201.1
  • kernel-preempt SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-obs-build SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +1 more 5.3.18-150300.59.201.1
  • kernel-default-base SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 5.3.18-150300.59.201.1.150300.18.120.1
  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.100.1

suse advisories SUSE-SU-2025:1293-1SUSE-SU-2025:1263-1SUSE-SU-2025:1241-1SUSE-SU-2025:1194-1SUSE-SU-2025:1183-1SUSE-SU-2025:1176-1

  • kernel AlmaLinux 8 4.18.0-553.62.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.62.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.62.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.62.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.62.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.62.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.62.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.62.1.el8_10

almalinux advisories ALSA-2025:11298ALSA-2025:11299

  • kernel-rt Rocky Linux 8 4.18.0-553.62.1.rt7.403.el8_10
  • kernel Rocky Linux 8 4.18.0-553.62.1.el8_10

rocky linux advisories RLSA-2025:11299RLSA-2025:11298

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-49058 updated cvss 7.0

kernel: cifs: potential buffer overflow in handling symlinks

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) perf 5.14.0-284.11.1.el9_2, rtla 5.14.0-284.11.1.el9_2, kernel-devel-matched 5.14.0-284.11.1.el9_2, kernel-64k-devel-matched 5.14.0-284.11.1.el9_2, kernel-debug-devel-matched 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, +5 more
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.141.1.el9_0, kernel-devel-matched 5.14.0-70.141.1.el9_0, kernel-debug-devel-matched 5.14.0-70.141.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.141.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.141.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.141.1.el9_0, +2 more
    fixed: vendor fix RHSA-2025:13030
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.62.1.el8_10, kernel 4.18.0-553.62.1.el8_10, bpftool 4.18.0-553.62.1.el8_10, kernel-core 4.18.0-553.62.1.el8_10, kernel-tools 4.18.0-553.62.1.el8_10, python3-perf 4.18.0-553.62.1.el8_10, +15 more
    fixed: vendor fix RHSA-2025:11298
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.0.0-284.11.1.el9_2, kernel 5.14.0-284.11.1.el9_2, kernel-64k 5.14.0-284.11.1.el9_2, kernel-core 5.14.0-284.11.1.el9_2, kernel-tools 5.14.0-284.11.1.el9_2, python3-perf 5.14.0-284.11.1.el9_2, +28 more
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.162.1.el8_2, kernel 4.18.0-193.162.1.el8_2, bpftool 4.18.0-193.162.1.el8_2, kernel-core 4.18.0-193.162.1.el8_2, kernel-tools 4.18.0-193.162.1.el8_2, python3-perf 4.18.0-193.162.1.el8_2, +8 more
    fixed: vendor fix RHSA-2025:12623
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.165.1.el8_4, kernel 4.18.0-305.165.1.el8_4, bpftool 4.18.0-305.165.1.el8_4, kernel-core 4.18.0-305.165.1.el8_4, kernel-tools 4.18.0-305.165.1.el8_4, python3-perf 4.18.0-305.165.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:12238
show 12 more
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.153.1.el8_6, kernel 4.18.0-372.153.1.el8_6, bpftool 4.18.0-372.153.1.el8_6, kernel-core 4.18.0-372.153.1.el8_6, kernel-tools 4.18.0-372.153.1.el8_6, python3-perf 4.18.0-372.153.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.153.1.el8_6, kernel 4.18.0-372.153.1.el8_6, bpftool 4.18.0-372.153.1.el8_6, kernel-core 4.18.0-372.153.1.el8_6, kernel-tools 4.18.0-372.153.1.el8_6, python3-perf 4.18.0-372.153.1.el8_6, +15 more
    fixed: vendor fix RHSA-2025:11570
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.104.1.el8_8, kernel 4.18.0-477.104.1.el8_8, bpftool 4.18.0-477.104.1.el8_8, kernel-core 4.18.0-477.104.1.el8_8, kernel-tools 4.18.0-477.104.1.el8_8, python3-perf 4.18.0-477.104.1.el8_8, +9 more
    fixed: vendor fix RHSA-2025:13061
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.141.1.el9_0, bpftool 5.14.0-70.141.1.el9_0, kernel-core 5.14.0-70.141.1.el9_0, kernel-tools 5.14.0-70.141.1.el9_0, python3-perf 5.14.0-70.141.1.el9_0, kernel-modules 5.14.0-70.141.1.el9_0, +14 more
    fixed: vendor fix RHSA-2025:13030
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.165.1.el8_4, kernel 4.18.0-305.165.1.el8_4, bpftool 4.18.0-305.165.1.el8_4, kernel-core 4.18.0-305.165.1.el8_4, kernel-tools 4.18.0-305.165.1.el8_4, python3-perf 4.18.0-305.165.1.el8_4, +8 more
    fixed: vendor fix RHSA-2025:12238
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.153.1.el8_6, kernel 4.18.0-372.153.1.el8_6, bpftool 4.18.0-372.153.1.el8_6, kernel-core 4.18.0-372.153.1.el8_6, kernel-tools 4.18.0-372.153.1.el8_6, python3-perf 4.18.0-372.153.1.el8_6, +8 more
    fixed: vendor fix RHSA-2025:11570
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.104.1.el8_8, kernel 4.18.0-477.104.1.el8_8, bpftool 4.18.0-477.104.1.el8_8, kernel-core 4.18.0-477.104.1.el8_8, kernel-tools 4.18.0-477.104.1.el8_8, python3-perf 4.18.0-477.104.1.el8_8, +8 more
    fixed: vendor fix RHSA-2025:13061
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.62.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.62.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.62.1.el8_10
    fixed: vendor fix RHSA-2025:11298
  • Red Hat Enterprise Linux CRB (v. 9) kernel-debuginfo-common-s390x 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-x86_64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-aarch64 5.14.0-284.11.1.el9_2, kernel-debuginfo-common-ppc64le 5.14.0-284.11.1.el9_2
    fixed: vendor fix RHSA-2023:2458
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-kvm 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-core 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-modules 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-debug-kvm 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-debug-core 4.18.0-553.62.1.rt7.403.el8_10, +4 more
    fixed: vendor fix RHSA-2025:11299
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-kvm 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-core 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-modules 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-debug-kvm 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-debug-core 5.14.0-70.141.1.rt21.213.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-core 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-modules 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-debug-core 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-debug-modules 5.14.0-70.141.1.rt21.213.el9_0, kernel-rt-modules-extra 5.14.0-70.141.1.rt21.213.el9_0, +2 more
    fixed: vendor fix RHSA-2025:13029
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-core 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-modules 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-debug-core 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-debug-modules 4.18.0-553.62.1.rt7.403.el8_10, kernel-rt-modules-extra 4.18.0-553.62.1.rt7.403.el8_10, +2 more
    fixed: vendor fix RHSA-2025:11299
  • Red Hat Enterprise Linux 10 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
13 mo ago

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.