Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 2.6.37 | 4.9.311 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 5.17.6-1 | — |
| Debian 13 | linux | 5.17.6-1 | — |
| Debian 12 | linux | 5.17.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux +1 | 5.15.0-37.39 | — |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1011.14 | — |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1010.12 | — |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1008.12 | — |
| Ubuntu 22.04 LTS | linux-gke | 5.15.0-1008.10 | — |
| Ubuntu 22.04 LTS | linux-ibm | 5.15.0-1007.8 | — |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1008.11 | — |
| Ubuntu 22.04 LTS | linux-kvm | 5.15.0-1010.11 | — |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1009.12 | — |
| Ubuntu 22.04 LTS | linux-raspi | 5.15.0-1011.13 | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux | 5.4.0-122.138 | — |
| Ubuntu 20.04 LTS | linux-aws | 5.4.0-1081.88 | — |
| Ubuntu 20.04 LTS | linux-azure | 5.4.0-1086.91 | — |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1008.9~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-bluefield | 5.4.0-1042.47 | — |
| Ubuntu 20.04 LTS | linux-gcp | 5.4.0-1084.92 | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-41.44~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-ibm | 5.4.0-1029.33 | — |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1008.11~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-iot | 5.4.0-1004.6 | — |
| Ubuntu 20.04 LTS | linux-kvm | 5.4.0-1071.76 | — |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-42.45~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle | 5.4.0-1079.87 | — |
| Ubuntu 20.04 LTS | linux-raspi | 5.4.0-1066.76 | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-189.200 | — |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1137.148 | — |
| Ubuntu 18.04 LTS | linux-aws-5.4 | 5.4.0-1081.88~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-4.15 | 4.15.0-1146.161 | — |
| Ubuntu 18.04 LTS | linux-azure-5.4 | 5.4.0-1086.91~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp-4.15 | 4.15.0-1131.147 | — |
| Ubuntu 18.04 LTS | linux-gcp-5.4 | 5.4.0-1084.92~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe-5.4 | 5.4.0-122.138~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-ibm-5.4 | 5.4.0-1029.33~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1123.128 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1102.113 | — |
| Ubuntu 18.04 LTS | linux-oracle-5.4 | 5.4.0-1079.87~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-raspi-5.4 | 5.4.0-1066.76~18.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1014.14 | — |
| Ubuntu Pro FIPS 20.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | linux-fips +3 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-aws-fips +1 | 5.4.0-1081.88+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-azure-fips | 5.4.0-1086.91+fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | linux-fips | 5.4.0-1057.65 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2076.81 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2057.63 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-fips | 4.15.0-1094.105 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-gcp-fips | 4.15.0-2041.46 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro 16.04 LTS | linux | 4.4.0-291.325 | USN-9033-1 |
| Ubuntu Pro 16.04 LTS | linux-aws | 4.4.0-1200.215 | USN-9033-1 |
| Ubuntu Pro 16.04 LTS | linux-aws-hwe | 4.15.0-1137.148~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-azure | 4.15.0-1146.161~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-gcp | 4.15.0-1131.147~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-hwe | 4.15.0-189.200~16.04.1 | — |
| Ubuntu Pro 16.04 LTS | linux-kvm | 4.4.0-1163.174 | USN-9033-1 |
| Ubuntu Pro 16.04 LTS | linux-oracle | 4.15.0-1102.113~16.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux | 3.13.0-219.270 | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1162.168 | USN-9034-1 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1146.161~14.04.1 | — |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-291.325~14.04.1 | USN-9033-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | bpftool | 7.0.0-284.11.1.el9_2 | RHSA-2023:2458 |
| RHEL 9 | perf +48 | 5.14.0-284.11.1.el9_2 | RHSA-2023:2458 |
| RHEL 8 | kernel-rt +12 | 4.18.0-553.62.1.rt7.403.el8_10 | RHSA-2025:11299 |
| RHEL 8 | perf +26 | 4.18.0-553.62.1.el8_10 | RHSA-2025:11298 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 E4S | kernel-rt +12 | 5.14.0-70.141.1.rt21.213.el9_0 | RHSA-2025:13029 |
| RHEL 9.0 E4S | perf +28 | 5.14.0-70.141.1.el9_0 | RHSA-2025:13030 |
| RHEL 8.8 TUS | perf +17 | 4.18.0-477.104.1.el8_8 | RHSA-2025:13061 |
| RHEL 8.8 E4S | perf +18 | 4.18.0-477.104.1.el8_8 | RHSA-2025:13061 |
| RHEL 8.6 TUS | perf +17 | 4.18.0-372.153.1.el8_6 | RHSA-2025:11570 |
| RHEL 8.6 E4S | perf +25 | 4.18.0-372.153.1.el8_6 | RHSA-2025:11570 |
| RHEL 8.6 AUS | perf +17 | 4.18.0-372.153.1.el8_6 | RHSA-2025:11570 |
| RHEL 8.4 EUS Long Life | perf +17 | 4.18.0-305.165.1.el8_4 | RHSA-2025:12238 |
| RHEL 8.4 AUS | perf +17 | 4.18.0-305.165.1.el8_4 | RHSA-2025:12238 |
| RHEL 8.2 AUS | perf +17 | 4.18.0-193.162.1.el8_2 | RHSA-2025:12623 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-rt +9 | 4.18.0-553.62.1.rt7.403.el8_10 | ALSA-2025:11299 |
| AlmaLinux 8 | perf +24 | 4.18.0-553.62.1.el8_10 | ALSA-2025:11298 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | kernel | 4.18.0-553.62.1.el8_10 | RLSA-2025:11298 |
| Rocky Linux 8 | kernel-rt | 4.18.0-553.62.1.rt7.403.el8_10 | RLSA-2025:11299 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | kernel-64kb +6 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLES 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLES 15 SP4 | kernel-64kb +6 | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLES 15 SP4 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SLES 15 SP3 | kernel-64kb +7 | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLES 15 SP3 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
| SLES 12 SP5 | kernel-syms +2 | 4.12.14-122.255.1 | SUSE-SU-2025:1293-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLES for SAP 15 SP5 | kernel-docs +4 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLES for SAP 15 SP4 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SLES for SAP 15 SP4 | kernel-docs +4 | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLES for SAP 15 SP3 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
| SLES for SAP 15 SP3 | kernel-docs +5 | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLE Micro 5.5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLE Micro 5.5 | kernel-rt +1 | 5.14.21-150500.13.91.1 | SUSE-SU-2025:1176-1 |
| SLE Micro 5.5 | kernel-source +1 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE Micro 5.4 | kernel-default | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLE Micro 5.4 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SLE Micro 5.4 | kernel-rt +1 | 5.14.21-150400.15.115.1 | SUSE-SU-2025:1183-1 |
| SLE Micro 5.3 | kernel-default | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLE Micro 5.3 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SLE Micro 5.3 | kernel-rt +1 | 5.14.21-150400.15.115.1 | SUSE-SU-2025:1183-1 |
| SLE Micro 5.2 | kernel-default | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLE Micro 5.2 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
| SLE Micro 5.2 | kernel-rt +1 | 5.3.18-150300.205.1 | SUSE-SU-2025:1194-1 |
| SLE Micro 5.1 | kernel-default | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLE Micro 5.1 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
| SLE Micro 5.1 | kernel-rt +1 | 5.3.18-150300.205.1 | SUSE-SU-2025:1194-1 |
| SLE Live Patching 15 SP5 | kernel-default | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_25 | 1-150500.11.3.1 | SUSE-SU-2025:1241-1 |
| SLE Live Patching 15 SP4 | kernel-default | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLE Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_38 | 1-150400.9.3.1 | SUSE-SU-2025:1027-1 |
| SLE Live Patching 15 SP3 | kernel-default | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLE Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_56 | 1-150300.7.3.1 | SUSE-SU-2025:1263-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.255.1 | SUSE-SU-2025:1293-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_67 | 1-8.5.1 | SUSE-SU-2025:1293-1 |
| SLE HPC 15 SP5 | kernel-64kb +5 | 5.14.21-150500.55.100.1 | SUSE-SU-2025:1241-1 |
| SLE HPC 15 SP5 | kernel-default-base | 5.14.21-150500.55.100.1.150500.6.47.1 | SUSE-SU-2025:1241-1 |
| SLE HPC 15 SP4 | kernel-64kb +5 | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SLE HPC 15 SP4 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SLE HPC 15 SP3 | kernel-64kb +6 | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SLE HPC 15 SP3 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
| SUSE Manager Server 4.3 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SUSE Manager Server 4.3 | kernel-syms +3 | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SUSE Manager Proxy 4.3 | kernel-default-base | 5.14.21-150400.24.158.1.150400.24.78.1 | SUSE-SU-2025:1027-1 |
| SUSE Manager Proxy 4.3 | kernel-syms +2 | 5.14.21-150400.24.158.1 | SUSE-SU-2025:1027-1 |
| SUSE Enterprise Storage 7.1 | kernel-64kb +6 | 5.3.18-150300.59.201.1 | SUSE-SU-2025:1263-1 |
| SUSE Enterprise Storage 7.1 | kernel-default-base | 5.3.18-150300.59.201.1.150300.18.120.1 | SUSE-SU-2025:1263-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.276-211.499 | 1.0-0.amzn2 | ALAS2-2024-2569 |
| Amazon Linux 2 | perf +8 | 4.14.276-211.499.amzn2 | ALAS2-2024-2569 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-553.62.1.el8_10 | ELSA-2025-11298 |
Advisories 27
- USN-9034-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Nov 11, 2026
- USN-9033-1 linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Nov 11, 2026
- ALSA-2025:11298 Moderate: kernel security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:11299 Moderate: kernel-rt security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:2458 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2025:13061 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Sep 19, 2026
- RHSA-2025:13029 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Sep 19, 2026
- RHSA-2025:13030 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Sep 19, 2026
- RHSA-2025:12623 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 6, 2026
- RHSA-2025:12238 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 6, 2026
- RHSA-2025:11570 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 6, 2026
- RHSA-2025:11299 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Aug 6, 2026
- RHSA-2025:11298 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Aug 6, 2026
- WID-SEC-2025-1905 IBM QRadar SIEM Komponente: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 4, 2026
- SUSE-SU-2025:1194-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1176-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1241-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1027-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1183-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1293-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- NCSC-2025-0382 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Dec 9, 2025
- SSA-202008 SSA-202008: Multiple Vulnerabilities in Ruggedcom Rox Before V2.17.0 Siemens ProductCERT · Dec 9, 2025
- RLSA-2025:11299 Moderate: kernel-rt security update Rocky Linux Security Advisories · Jul 29, 2025
- RLSA-2025:11298 Moderate: kernel security update Rocky Linux Security Advisories · Jul 29, 2025
- ELSA-2025-11298 Moderate: kernel security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 16, 2025
- ALAS2-2024-2569 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 19, 2025
- SUSE-SU-2025:1263-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Apr 16, 2025
References
- https://git.kernel.org/stable/c/3e582749e742e662a8e9bb37cffac62dccaaa1e2
- https://git.kernel.org/stable/c/1316c28569a80ab3596eeab05bf5e01991e7e739
- https://git.kernel.org/stable/c/eb5f51756944735ac70cd8bb38637cc202e29c91
- https://git.kernel.org/stable/c/22d658c6c5affed10c8907e67160cef0b6c92186
- https://git.kernel.org/stable/c/4e166a41180be2f1e66bbb6d46448e80a9a5ec05
- https://git.kernel.org/stable/c/9901b07ba42b39266b34a888e48d7306fd707bee
- https://git.kernel.org/stable/c/515e7ba11ef043d6febe69389949c8ef5f25e9d0
- https://git.kernel.org/stable/c/64c4a37ac04eeb43c42d272f6e6c8c12bfcf4304