Security update for the Linux Kernel (Live Patch 48 for SLE 15 SP2) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2024:2351-1 Final 1 1 2024-07-09T11:04:32Z current 2024-07-09T11:04:32Z 2024-07-09T11:04:32Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 48 for SLE 15 SP2) This update for the Linux Kernel 5.3.18-150200_24_191 fixes several issues. The following security issues were fixed: - CVE-2021-47383: Fixed out-of-bound vmalloc access in imageblit (bsc#1225211). - CVE-2024-26923: Fixed false-positive lockdep splat for spin_lock() in __unix_gc() (bsc#1223683). - CVE-2024-26828: Fixed underflow in parse_server_interfaces() (bsc#1223363). - CVE-2023-1829: Fixed a use-after-free vulnerability in the control index filter (tcindex) (bsc#1210619). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2024-2351,SUSE-SLE-Module-Live-Patching-15-SP2-2024-2351 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2024/suse-su-20242351-1/ Link for SUSE-SU-2024:2351-1 https://lists.suse.com/pipermail/sle-security-updates/2024-July/018891.html E-Mail link for SUSE-SU-2024:2351-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1210619 SUSE Bug 1210619 https://bugzilla.suse.com/1223363 SUSE Bug 1223363 https://bugzilla.suse.com/1223683 SUSE Bug 1223683 https://bugzilla.suse.com/1225211 SUSE Bug 1225211 https://www.suse.com/security/cve/CVE-2021-47383/ SUSE CVE CVE-2021-47383 page https://www.suse.com/security/cve/CVE-2023-1829/ SUSE CVE CVE-2023-1829 page https://www.suse.com/security/cve/CVE-2024-26828/ SUSE CVE CVE-2024-26828 page https://www.suse.com/security/cve/CVE-2024-26923/ SUSE CVE CVE-2024-26923 page SUSE Linux Enterprise Live Patching 15 SP2 kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 kernel-livepatch-5_3_18-150200_24_191-preempt-3-150200.5.6.1 kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 as a component of SUSE Linux Enterprise Live Patching 15 SP2 In the Linux kernel, the following vulnerability has been resolved: tty: Fix out-of-bound vmalloc access in imageblit This issue happens when a userspace program does an ioctl FBIOPUT_VSCREENINFO passing the fb_var_screeninfo struct containing only the fields xres, yres, and bits_per_pixel with values. If this struct is the same as the previous ioctl, the vc_resize() detects it and doesn't call the resize_screen(), leaving the fb_var_screeninfo incomplete. And this leads to the updatescrollmode() calculates a wrong value to fbcon_display->vrows, which makes the real_y() return a wrong value of y, and that value, eventually, causes the imageblit to access an out-of-bound address value. To solve this issue I made the resize_screen() be called even if the screen does not need any resizing, so it will "fix and fill" the fb_var_screeninfo independently. CVE-2021-47383 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2024/suse-su-20242351-1/ https://www.suse.com/security/cve/CVE-2021-47383.html CVE-2021-47383 https://bugzilla.suse.com/1225208 SUSE Bug 1225208 https://bugzilla.suse.com/1225211 SUSE Bug 1225211 A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28. CVE-2023-1829 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2024/suse-su-20242351-1/ https://www.suse.com/security/cve/CVE-2023-1829.html CVE-2023-1829 https://bugzilla.suse.com/1210335 SUSE Bug 1210335 https://bugzilla.suse.com/1210619 SUSE Bug 1210619 https://bugzilla.suse.com/1217444 SUSE Bug 1217444 https://bugzilla.suse.com/1217531 SUSE Bug 1217531 https://bugzilla.suse.com/1220886 SUSE Bug 1220886 https://bugzilla.suse.com/1228311 SUSE Bug 1228311 In the Linux kernel, the following vulnerability has been resolved: cifs: fix underflow in parse_server_interfaces() In this loop, we step through the buffer and after each item we check if the size_left is greater than the minimum size we need. However, the problem is that "bytes_left" is type ssize_t while sizeof() is type size_t. That means that because of type promotion, the comparison is done as an unsigned and if we have negative bytes left the loop continues instead of ending. CVE-2024-26828 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2024/suse-su-20242351-1/ https://www.suse.com/security/cve/CVE-2024-26828.html CVE-2024-26828 https://bugzilla.suse.com/1223084 SUSE Bug 1223084 https://bugzilla.suse.com/1223363 SUSE Bug 1223363 In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix garbage collector racing against connect() Garbage collector does not take into account the risk of embryo getting enqueued during the garbage collection. If such embryo has a peer that carries SCM_RIGHTS, two consecutive passes of scan_children() may see a different set of children. Leading to an incorrectly elevated inflight count, and then a dangling pointer within the gc_inflight_list. sockets are AF_UNIX/SOCK_STREAM S is an unconnected socket L is a listening in-flight socket bound to addr, not in fdtable V's fd will be passed via sendmsg(), gets inflight count bumped connect(S, addr) sendmsg(S, [V]); close(V) __unix_gc() ---------------- ------------------------- ----------- NS = unix_create1() skb1 = sock_wmalloc(NS) L = unix_find_other(addr) unix_state_lock(L) unix_peer(S) = NS // V count=1 inflight=0 NS = unix_peer(S) skb2 = sock_alloc() skb_queue_tail(NS, skb2[V]) // V became in-flight // V count=2 inflight=1 close(V) // V count=1 inflight=1 // GC candidate condition met for u in gc_inflight_list: if (total_refs == inflight_refs) add u to gc_candidates // gc_candidates={L, V} for u in gc_candidates: scan_children(u, dec_inflight) // embryo (skb1) was not // reachable from L yet, so V's // inflight remains unchanged __skb_queue_tail(L, skb1) unix_state_unlock(L) for u in gc_candidates: if (u.inflight) scan_children(u, inc_inflight_move_tail) // V count=1 inflight=2 (!) If there is a GC-candidate listening socket, lock/unlock its state. This makes GC wait until the end of any ongoing connect() to that socket. After flipping the lock, a possibly SCM-laden embryo is already enqueued. And if there is another embryo coming, it can not possibly carry SCM_RIGHTS. At this point, unix_inflight() can not happen because unix_gc_lock is already taken. Inflight graph remains unaffected. CVE-2024-26923 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_191-default-3-150200.5.6.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2024/suse-su-20242351-1/ https://www.suse.com/security/cve/CVE-2024-26923.html CVE-2024-26923 https://bugzilla.suse.com/1223384 SUSE Bug 1223384 https://bugzilla.suse.com/1223683 SUSE Bug 1223683