Description
crypto/pcrypt.c in the Linux kernel before 4.14.13 mishandles freeing instances, allowing a local user able to access the AF_ALG-based AEAD interface (CONFIG_CRYPTO_USER_API_AEAD) and pcrypt (CONFIG_CRYPTO_PCRYPT) to cause a denial of service (kfree of an incorrect pointer) or possibly have unspecified other impact by executing a crafted sequence of system calls.
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 | 4.14.13-1 | — |
| Debian 13 | linux | 4.14.13-1 | — |
| Debian 12 | linux | 4.14.13-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-119.143 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1054.63 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1013.13~16.04.2 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1014.14~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-24.26~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1020.25 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1086.94 | USN-3619-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1088.93 | USN-3619-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1016.16 | USN-3619-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-119.143~14.04.1 | USN-3619-2 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +14 | 4.14.0-115.el7a | RHSA-2018:2948 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_1 | 6-2.1 | SUSE-SU-2018:0595-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_2 +1 | 5-2.1 | SUSE-SU-2018:0597-1, SUSE-SU-2018:0590-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_4 | 4-2.1 | SUSE-SU-2018:0592-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_5 +2 | 3-2.1 | SUSE-SU-2018:0596-1, SUSE-SU-2018:0594-1, SUSE-SU-2018:0593-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_11 +1 | 7-2.1 | SUSE-SU-2018:0586-1, SUSE-SU-2018:0584-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_13 | 6-2.1 | SUSE-SU-2018:0579-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_14 +1 | 4-2.1 | SUSE-SU-2018:0591-1, SUSE-SU-2018:0572-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_16 +1 | 3-2.1 | SUSE-SU-2018:0582-1, SUSE-SU-2018:0578-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_5 | 11-2.1 | SUSE-SU-2018:0568-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_6 | 10-2.1 | SUSE-SU-2018:0576-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_7 +1 | 9-2.1 | SUSE-SU-2018:0574-1, SUSE-SU-2018:0573-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_9 +1 | 8-2.1 | SUSE-SU-2018:0577-1, SUSE-SU-2018:0575-1 |
Advisories 23
- RHSA-2018:2948 Red Hat Security Advisory: kernel-alt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3619-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3619-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:0586-1 Security update for the Linux Kernel (Live Patch 12 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0574-1 Security update for the Linux Kernel (Live Patch 8 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0590-1 Security update for the Linux Kernel (Live Patch 3 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0577-1 Security update for the Linux Kernel (Live Patch 9 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0592-1 Security update for the Linux Kernel (Live Patch 4 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0584-1 Security update for the Linux Kernel (Live Patch 11 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0573-1 Security update for the Linux Kernel (Live Patch 7 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0591-1 Security update for the Linux Kernel (Live Patch 15 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0578-1 Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0572-1 Security update for the Linux Kernel (Live Patch 14 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0576-1 Security update for the Linux Kernel (Live Patch 6 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0593-1 Security update for the Linux Kernel (Live Patch 7 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0594-1 Security update for the Linux Kernel (Live Patch 6 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0575-1 Security update for the Linux Kernel (Live Patch 10 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0579-1 Security update for the Linux Kernel (Live Patch 13 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0568-1 Security update for the Linux Kernel (Live Patch 5 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0582-1 Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0596-1 Security update for the Linux Kernel (Live Patch 5 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0595-1 Security update for the Linux Kernel (Live Patch 1 for SLE 12 SP3) SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:0597-1 Security update for the Linux Kernel (Live Patch 2 for SLE 12 SP3) SUSE / openSUSE Security Updates · May 2, 2025
References
- 102813 vdb-entry
- USN-3619-2 vendor-advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.13
- RHSA-2018:2948 vendor-advisory
- https://github.com/torvalds/linux/commit/d76c68109f37cb85b243a1cf0f40313afd2bae68
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d76c68109f37cb85b243a1cf0f40313afd2bae68
- USN-3619-1 vendor-advisory