CVE-2020-29368

An issue was discovered in splithugepmd in mm/hugememory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1...

Race condition

An issue was discovered in splithugepmd in mm/hugememory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1...

CVE-2020-29368

Affected software: Linux kernel up to version prior to 5.7.5 (pre-5.7.5). Vulnerability details: In mm/huge_memory.c, __split_huge_pmd, the copy-on-write CoW implementation can grant unintended write access due to a race in the THP mapcount check. This race condition can lead to local write acces...

Linux CoW Incorrect Access Grant Exploit

A Linux copy-on-write issue can wrongly grant write access. Linux: CoW can wrongly grant write access because of pinned references or THP bug I've stumbled over two ways in which copy-on-write of anonymous memory after fork is currently broken: Page references through the page refcount and a bug ...

PT-2020-1260 · Linux +7 · Linux Kernel +7

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 5.7.5 Description: The issue is related to the split huge pmd function in the mm/huge memory.c file of the Linux kernel. It involves a race condition in a THP mapcount check, which can grant unintended write...

Denial Of Service (DoS)

kernel is vulnerable to denial of service DoS. The vulnerability exists as a flaw was found in the Linux kernel's Transparent Huge Pages THP implementation. A local, unprivileged user could abuse this flaw to allow the user stack when it is using huge pages to grow and cause a denial of service...

RancherOS < 1.1.1 Privilege Escalation (Dirty COW)

The remote host is running a version of RancherOS that is prior to v.1.1.1, hence is vulnerable to a privilege escalation vulnerability. The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty in the touchpmd function inside the THP implementation. touchpmd can be reach...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

RHEL 7 : kernel (RHSA-2019:1484)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:1484 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: An integer overflow flaw was found in...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.3 Advanced Update Support, Red Hat Enterprise Linux 7.3 Telco Extended Update Support, and Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impac...

OracleVM 3.4 : Unbreakable / etc (OVMSA-2019-0023) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL)

The remote OracleVM system is missing necessary patches to address critical security updates : - x86/speculation/mds: Check for the right microcode before setting mitigation Kanth Ghatraju Orabug: 29797118 - vxlan: test dev-flags & IFFUP before accessing vxlan-dev-devaddr Venkat Venkatsubra Orabu...

openSUSE Security Update : the Linux Kernel (openSUSE-2017-1391) (Dirty COW)

The openSUSE Leap 42.3 kernel was updated to 4.4.103 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2017-1000405: A bug in the THP CoW support could be used by local attackers to corrupt memory of other processes and cause them to crash bnc1069496. -...

Security update for the Linux Kernel (important)

The openSUSE Leap 42.3 kernel was updated to 4.4.103 to receive various security and bugfixes. The following security bugs were fixed: - CVE-2017-1000405: A bug in the THP CoW support could be used by local attackers to corrupt memory of other processes and cause them to crash bnc1069496. -...

Unbreakable Enterprise kernel security and bugfix update

4.1.12-112.14.1 - ext4: fix off-by-one on max nrpages in ext4findunwrittenpgoff Eryu Guan Orabug: 27233471 4.1.12-112.13.1 - cgroup: make sure a parent css isnt offlined before its children Tejun Heo Orabug: 27179269 4.1.12-112.12.1 - ctf: allow dwarf2ctf to run as root but produce no output Nick...

Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2017-3651)

The remote Oracle Linux 6 / 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2017-3651 advisory. - mm, thp: Do not make page table dirty unconditionally in followtranshugepmd Kirill A. Shutemov Orabug: 27200879 CVE-2017-1000405 - fix unbalanced...

Code injection

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty in the touchpmd function inside the THP implementation. touchpmd can be reached by getuserpages. In such case, the pmd will become dirty. This scenario breaks the new canfollowwritepmd's logic - pmd can become dirt...

CVE-2017-1000405

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty in the touchpmd function inside the THP implementation. touchpmd can be reached by getuserpages. In such case, the pmd will become dirty. This scenario breaks the new canfollowwritepmd's logic - pmd can become dirt...

CVE-2017-1000405

CVE-2017-1000405 affects Linux kernel THP handling in versions 2.6.38–4.14. A flawed use of pmd_mkdirty() in touch_pmd() can be reached via get_user_pages(), allowing pmds to become dirty without a COW cycle. This enables overwriting read‑only huge pages (including zero pages and sealed SHMEM map...

CVE-2017-1000405

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty in the touchpmd function inside the THP implementation. touchpmd can be reached by getuserpages. In such case, the pmd will become dirty. This scenario breaks the new canfollowwritepmd's logic - pmd can become dirt...

CVE-2017-1000405

The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmdmkdirty in the touchpmd function inside the THP implementation. touchpmd can be reached by getuserpages. In such case, the pmd will become dirty. This scenario breaks the new canfollowwritepmd's logic - pmd can become dirt...