CVE-2024-38599jffs2: prevent xattr node from overflowing the eraseblock
Updated under an hour ago ()
Does this affect you?
It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: jffs2: prevent xattr node from overflowing the eraseblock Add a check to make sure that the requested xattr node size is no larger than the eraseblock minus the cleanmarker. Unlike the usual inode nodes, the xattr nodes aren't split into parts and spread across multiple eraseblocks, which means that a xattr node must not occupy more than one eraseblock. If the requested xattr value is too large, the xattr node can spill onto the next eraseblock, overwriting the nodes and causing errors such as: jffs2: argh. node added in wrong place at 0x0000b050(2) jffs2: nextblock 0x0000a000, expected at 0000b00c jffs2: error: (823) do_verify_xattr_datum: node CRC failed at 0x01e050, read=0xfc892c93, calc=0x000000 jffs2: notice: (823) jffs2_get_inode_nodes: Node header CRC failed at 0x01e00c. {848f,2fc4,0fef511f,59a3d171} jffs2: Node at 0x0000000c with length 0x00001044 would run over the end of the erase block jffs2: Perhaps the file system was created with the wrong erase size? jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000010: 0x1044 instead This breaks the filesystem and can lead to KASAN crashes such as: BUG: KASAN: slab-out-of-bounds in jffs2_sum_add_kvec+0x125e/0x15d0 Read of size 4 at addr ffff88802c31e914 by task repro/830 CPU: 0 PID: 830 Comm: repro Not tainted 6.9.0-rc3+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xc4/0x620 ? __virt_addr_valid+0x308/0x5b0 kasan_report+0xc1/0xf0 ? jffs2_sum_add_kvec+0x125e/0x15d0 ? jffs2_sum_add_kvec+0x125e/0x15d0 jffs2_sum_add_kvec+0x125e/0x15d0 jffs2_flash_direct_writev+0xa8/0xd0 jffs2_flash_writev+0x9c9/0xef0 ? __x64_sys_setxattr+0xc4/0x160 ? do_syscall_64+0x69/0x140 ? entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from aa98d7cf59b5b0764d3502662053489585faf2fe before 2904e1d9b64f72d291095e3cbb31634f08788b11; from aa98d7cf59b5b0764d3502662053489585faf2fe before 526235dffcac74c7823ed504dfac4f88d84ba5df; from aa98d7cf59b5b0764d3502662053489585faf2fe before f0eea095ce8c959b86e1e57fe36ca4fea5ae54f8; from aa98d7cf59b5b0764d3502662053489585faf2fe before a1d21bcd78cf4a4353e1e835789429c6b76aca8b; from aa98d7cf59b5b0764d3502662053489585faf2fe before f06969df2e40ab1dc8f4364a5de967830c74a098; from aa98d7cf59b5b0764d3502662053489585faf2fe before af82d8d2179b7277ad627c39e7e0778f1c86ccdb; from aa98d7cf59b5b0764d3502662053489585faf2fe before 8d431391320c5c5398ff966fb3a95e68a7def275; from aa98d7cf59b5b0764d3502662053489585faf2fe before 978a12c91b38bf1a213e567f3c20e2beef215f07; and 1 more ranges | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.18 before 4.19.316; from 4.20 before 5.4.278; from 5.5 before 5.10.219; from 5.11 before 5.15.161; from 5.16 before 6.1.93; from 6.2 before 6.6.33; from 6.7 before 6.8.12; from 6.9 before 6.9.3 | NVD |
References
- https://git.kernel.org/stable/c/2904e1d9b64f72d291095e3cbb31634f08788b11patch
- https://git.kernel.org/stable/c/526235dffcac74c7823ed504dfac4f88d84ba5dfpatch
- https://git.kernel.org/stable/c/f0eea095ce8c959b86e1e57fe36ca4fea5ae54f8patch
- https://git.kernel.org/stable/c/a1d21bcd78cf4a4353e1e835789429c6b76aca8bpatch
- https://git.kernel.org/stable/c/f06969df2e40ab1dc8f4364a5de967830c74a098patch
- https://git.kernel.org/stable/c/af82d8d2179b7277ad627c39e7e0778f1c86ccdbpatch
- https://git.kernel.org/stable/c/8d431391320c5c5398ff966fb3a95e68a7def275patch
- https://git.kernel.org/stable/c/978a12c91b38bf1a213e567f3c20e2beef215f07patch
- https://git.kernel.org/stable/c/c6854e5a267c28300ff045480b5a7ee7f6f1d913patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.