In the Linux kernel, the following vulnerability has been resolved: parisc: Fix random data corruption from exception handler The current exception handler implementation, which assists when accessing user space memory, may exhibit random data corruption if the compiler decides to use a different register than the specified register %r29 (defined in ASM_EXCEPTIONTABLE_REG) for the error code. If the compiler choose another register, the fault handler will nevertheless store -EFAULT into %r29 and thus trash whatever this register is used for. Looking at the assembly I found that this happens sometimes in emulate_ldd(). To solve the issue, the easiest solution would be if it somehow is possible to tell the fault handler which register is used to hold the error code. Using %0 or %1 in the inline assembly is not posssible as it will show up as e.g. %r29 (with the "%r" prefix), which the GNU assembler can not convert to an integer. This patch takes another, better and more flexible approach: We extend the __ex_table (which is out of the execution path) by one 32-word. In this word we tell the compiler to insert the assembler instruction "or %r0,%r0,%reg", where %reg references the register which the compiler choosed for the error return code. In case of an access failure, the fault handler finds the __ex_table entry and can examine the opcode. The used register is encoded in the lowest 5 bits, and the fault handler can then store -EFAULT into this register. Since we extend the __ex_table to 3 words we can't use the BUILDTIME_TABLE_SORT config option any longer.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5658 advisory.

    -----BEGIN PGP SIGNED MESSAGE-----     Hash: SHA512

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5658-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     April 13, 2024                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : linux     CVE ID         : CVE-2023-2176 CVE-2023-6270 CVE-2023-7042 CVE-2023-28746                      CVE-2023-47233 CVE-2023-52429 CVE-2023-52434 CVE-2023-52435                      CVE-2023-52583 CVE-2023-52584 CVE-2023-52587 CVE-2023-52588                      CVE-2023-52589 CVE-2023-52593 CVE-2023-52594 CVE-2023-52595                      CVE-2023-52597 CVE-2023-52598 CVE-2023-52599 CVE-2023-52600                      CVE-2023-52601 CVE-2023-52602 CVE-2023-52603 CVE-2023-52604                      CVE-2023-52606 CVE-2023-52607 CVE-2023-52616 CVE-2023-52617                      CVE-2023-52618 CVE-2023-52619 CVE-2023-52620 CVE-2023-52621                      CVE-2023-52622 CVE-2023-52623 CVE-2023-52630 CVE-2023-52631                      CVE-2023-52632 CVE-2023-52633 CVE-2023-52635 CVE-2023-52637                      CVE-2023-52638 CVE-2023-52639 CVE-2023-52640 CVE-2023-52641                      CVE-2024-0340 CVE-2024-0841 CVE-2024-1151 CVE-2024-2201                      CVE-2024-22099 CVE-2024-23850 CVE-2024-23851 CVE-2024-24857                      CVE-2024-24858 CVE-2024-26581 CVE-2024-26582 CVE-2024-26583                      CVE-2024-26584 CVE-2024-26585 CVE-2024-26586 CVE-2024-26590                      CVE-2024-26593 CVE-2024-26600 CVE-2024-26601 CVE-2024-26602                      CVE-2024-26603 CVE-2024-26606 CVE-2024-26621 CVE-2024-26622                      CVE-2024-26625 CVE-2024-26626 CVE-2024-26627 CVE-2024-26629                      CVE-2024-26639 CVE-2024-26640 CVE-2024-26641 CVE-2024-26642                      CVE-2024-26643 CVE-2024-26651 CVE-2024-26654 CVE-2024-26659                      CVE-2024-26660 CVE-2024-26663 CVE-2024-26664 CVE-2024-26665                      CVE-2024-26667 CVE-2024-26671 CVE-2024-26673 CVE-2024-26675                      CVE-2024-26676 CVE-2024-26679 CVE-2024-26680 CVE-2024-26681                      CVE-2024-26684 CVE-2024-26685 CVE-2024-26686 CVE-2024-26687                      CVE-2024-26688 CVE-2024-26689 CVE-2024-26695 CVE-2024-26696                      CVE-2024-26697 CVE-2024-26698 CVE-2024-26700 CVE-2024-26702                      CVE-2024-26704 CVE-2024-26706 CVE-2024-26707 CVE-2024-26710                      CVE-2024-26712 CVE-2024-26714 CVE-2024-26715 CVE-2024-26717                      CVE-2024-26718 CVE-2024-26720 CVE-2024-26722 CVE-2024-26723                      CVE-2024-26726 CVE-2024-26727 CVE-2024-26731 CVE-2024-26733                      CVE-2024-26735 CVE-2024-26736 CVE-2024-26737 CVE-2024-26741                      CVE-2024-26742 CVE-2024-26743 CVE-2024-26744 CVE-2024-26745                      CVE-2024-26747 CVE-2024-26748 CVE-2024-26749 CVE-2024-26750                      CVE-2024-26751 CVE-2024-26752 CVE-2024-26753 CVE-2024-26754                      CVE-2024-26759 CVE-2024-26760 CVE-2024-26761 CVE-2024-26763                      CVE-2024-26764 CVE-2024-26765 CVE-2024-26766 CVE-2024-26769                      CVE-2024-26771 CVE-2024-26772 CVE-2024-26773 CVE-2024-26774                      CVE-2024-26775 CVE-2024-26776 CVE-2024-26777 CVE-2024-26778                      CVE-2024-26779 CVE-2024-26780 CVE-2024-26781 CVE-2024-26782                      CVE-2024-26787 CVE-2024-26788 CVE-2024-26789 CVE-2024-26790                      CVE-2024-26791 CVE-2024-26792 CVE-2024-26793 CVE-2024-26795                      CVE-2024-26798 CVE-2024-26800 CVE-2024-26801 CVE-2024-26802                      CVE-2024-26803 CVE-2024-26804 CVE-2024-26805 CVE-2024-26809                      CVE-2024-26810 CVE-2024-26811 CVE-2024-26812 CVE-2024-26813                      CVE-2024-26814 CVE-2024-26815 CVE-2024-26816 CVE-2024-27437

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For the stable distribution (bookworm), these problems have been fixed in     version 6.1.85-1.

    We recommend that you upgrade your linux packages.

    For the detailed security status of linux please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/linux

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org
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Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

CVE-2024-26706

critical

Tenable Plugins

high