Linux: Out-of-bounds Read
CVE-2024-56650 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 147a42bb02de8735cb08476be6d0917987d022c2, ad28612ebae1fcc1104bd432e99e99d87f6bfe09, 36a9d94dac28beef6b8abba46ba8874320d3e800 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.27% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to 147a42bb02de8735cb08476be6d0917987d022c2 or ad28612ebae1fcc1104bd432e99e99d87f6bfe09 or 36a9d94dac28beef6b8abba46ba8874320d3e800 or ab9916321c95f5280b72b4c5055e269f98627efe, whichever matches your release line, or a later version.
- Update SIMATIC S7-1500 CPU 1518-4 PN/DP MFP to V3.1.5 or a later version.
- Update SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP to V3.1.5 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, 147a42bb02de8735cb08476be6d0917987d022c2; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, ad28612ebae1fcc1104bd432e99e99d87f6bfe09; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, 36a9d94dac28beef6b8abba46ba8874320d3e800; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, ab9916321c95f5280b72b4c5055e269f98627efe; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, a9bcc0b70d9baf3ff005874489a0dc9d023b54c3; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, c40c96d98e536fc1daaa125c2332b988615e30a4; 268cb38e1802db560c73167e643f14a3dcb4b07c up to, but not including, 04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7; 2.6.30 | 147a42bb02de8735cb08476be6d0917987d022c2, ad28612ebae1fcc1104bd432e99e99d87f6bfe09, 36a9d94dac28beef6b8abba46ba8874320d3e800, ab9916321c95f5280b72b4c5055e269f98627efe, a9bcc0b70d9baf3ff005874489a0dc9d023b54c3, c40c96d98e536fc1daaa125c2332b988615e30a4 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.0 up to, but not including, V3.1.5 | V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.0 up to, but not including, V3.1.5 | V3.1.5 |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.0 up to, but not including, V3.1.5 | V3.1.5 |
| Siemens | RUGGEDCOM RST2428P | before V3.2 | V3.2 |
| Siemens | SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family | before V3.2 | V3.2 |
| Siemens | SCALANCE XCM-/XRM-/XCH-/XRH-300 family | before V3.2 | V3.2 |
| Linux | Linux Kernel | 2.6.30 up to, but not including, 5.4.287; 5.5 up to, but not including, 5.10.231; 5.11 up to, but not including, 5.15.174; 5.16 up to, but not including, 6.1.120; 6.2 up to, but not including, 6.6.66; 6.7 up to, but not including, 6.12.5; 6.13 | 5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.66, 6.12.5 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.1 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
| CVSS 3.1 | 7.1 | High | CISA (ADP) |
Official description
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: fix LED ID check in led_tg_check() Syzbot has reported the following BUG detected by KASAN: BUG: KASAN: slab-out-of-bounds in strlen+0x58/0x70 Read of size 1 at addr ffff8881022da0c8 by task repro/5879 ... Call Trace: <TASK> dump_stack_lvl+0x241/0x360 ? __pfx_dump_stack_lvl+0x10/0x10 ? __pfx__printk+0x10/0x10 ? _printk+0xd5/0x120 ? __virt_addr_valid+0x183/0x530 ? __virt_addr_valid+0x183/0x530 print_report+0x169/0x550 ? __virt_addr_valid+0x183/0x530 ? __virt_addr_valid+0x183/0x530 ? __virt_addr_valid+0x45f/0x530 ? __phys_addr+0xba/0x170 ? strlen+0x58/0x70 kasan_report+0x143/0x180 ? strlen+0x58/0x70 strlen+0x58/0x70 kstrdup+0x20/0x80 led_tg_check+0x18b/0x3c0 xt_check_target+0x3bb/0xa40 ? __pfx_xt_check_target+0x10/0x10 ? stack_depot_save_flags+0x6e4/0x830 ? nft_target_init+0x174/0xc30 nft_target_init+0x82d/0xc30 ? __pfx_nft_target_init+0x10/0x10 ? nf_tables_newrule+0x1609/0x2980 ? nf_tables_newrule+0x1609/0x2980 ? rcu_is_watching+0x15/0xb0 ? nf_tables_newrule+0x1609/0x2980 ? nf_tables_newrule+0x1609/0x2980 ? __kmalloc_noprof+0x21a/0x400 nf_tables_newrule+0x1860/0x2980 ? __pfx_nf_tables_newrule+0x10/0x10 ? __nla_parse+0x40/0x60 nfnetlink_rcv+0x14e5/0x2ab0 ? __pfx_validate_chain+0x10/0x10 ? __pfx_nfnetlink_rcv+0x10/0x10 ? __lock_acquire+0x1384/0x2050 ? netlink_deliver_tap+0x2e/0x1b0 ? __pfx_lock_release+0x10/0x10 ? netlink_deliver_tap+0x2e/0x1b0 netlink_unicast+0x7f8/0x990 ? __pfx_netlink_unicast+0x10/0x10 ? __virt_addr_valid+0x183/0x530 ? __check_object_size+0x48e/0x900 netlink_sendmsg+0x8e4/0xcb0 ? __pfx_netlink_sendmsg+0x10/0x10 ? aa_sock_msg_perm+0x91/0x160 ? __pfx_netlink_sendmsg+0x10/0x10 __sock_sendmsg+0x223/0x270 ____sys_sendmsg+0x52a/0x7e0 ? __pfx_____sys_sendmsg+0x10/0x10 __sys_sendmsg+0x292/0x380 ? __pfx___sys_sendmsg+0x10/0x10 ? lockdep_hardirqs_on_prepare+0x43d/0x780 ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 ? exc_page_fault+0x590/0x8c0 ? do_syscall_64+0xb6/0x230 do_syscall_64+0xf3/0x230 entry_SYSCALL_64_after_hwframe+0x77/0x7f ... </TASK> Since an invalid (without '\0' byte at all) byte sequence may be passed from userspace, add an extra check to ensure that such a sequence is rejected as possible ID and so never passed to 'kstrdup()' and further.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- git.kernel.org/stable/c/04317f4eb2aad312ad85c1a17ad81fe75f1f9bc7
- git.kernel.org/stable/c/147a42bb02de8735cb08476be6d0917987d022c2
- git.kernel.org/stable/c/36a9d94dac28beef6b8abba46ba8874320d3e800
- git.kernel.org/stable/c/a9bcc0b70d9baf3ff005874489a0dc9d023b54c3
- git.kernel.org/stable/c/ab9916321c95f5280b72b4c5055e269f98627efe
- git.kernel.org/stable/c/ad28612ebae1fcc1104bd432e99e99d87f6bfe09
- git.kernel.org/stable/c/c40c96d98e536fc1daaa125c2332b988615e30a4
Other references
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
Linux Kernel Out-of-Bounds Read Exploited
- 7.1 High severity
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