{"id":"DEBIAN-CVE-2026-43277","details":"In the Linux kernel, the following vulnerability has been resolved:  APEI/GHES: ensure that won't go past CPER allocated record  The logic at ghes_new() prevents allocating too large records, by checking if they're bigger than GHES_ESTATUS_MAX_SIZE (currently, 64KB). Yet, the allocation is done with the actual number of pages from the CPER bios table location, which can be smaller.  Yet, a bad firmware could send data with a different size, which might be bigger than the allocated memory, causing an OOPS:      Unable to handle kernel paging request at virtual address fff00000f9b40000     Mem abort info:       ESR = 0x0000000096000007       EC = 0x25: DABT (current EL), IL = 32 bits       SET = 0, FnV = 0       EA = 0, S1PTW = 0       FSC = 0x07: level 3 translation fault     Data abort info:       ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000       CM = 0, WnR = 0, TnD = 0, TagAccess = 0       GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0     swapper pgtable: 4k pages, 52-bit VAs, pgdp=000000008ba16000     [fff00000f9b40000] pgd=180000013ffff403, p4d=180000013fffe403, pud=180000013f85b403, pmd=180000013f68d403, pte=0000000000000000     Internal error: Oops: 0000000096000007 [#1]  SMP     Modules linked in:     CPU: 0 UID: 0 PID: 303 Comm: kworker/0:1 Not tainted 6.19.0-rc1-00002-gda407d200220 #34 PREEMPT     Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 02/02/2022     Workqueue: kacpi_notify acpi_os_execute_deferred     pstate: 214020c5 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--)     pc : hex_dump_to_buffer+0x30c/0x4a0     lr : hex_dump_to_buffer+0x328/0x4a0     sp : ffff800080e13880     x29: ffff800080e13880 x28: ffffac9aba86f6a8 x27: 0000000000000083     x26: fff00000f9b3fffc x25: 0000000000000004 x24: 0000000000000004     x23: ffff800080e13905 x22: 0000000000000010 x21: 0000000000000083     x20: 0000000000000001 x19: 0000000000000008 x18: 0000000000000010     x17: 0000000000000001 x16: 00000007c7f20fec x15: 0000000000000020     x14: 0000000000000008 x13: 0000000000081020 x12: 0000000000000008     x11: ffff800080e13905 x10: ffff800080e13988 x9 : 0000000000000000     x8 : 0000000000000000 x7 : 0000000000000001 x6 : 0000000000000020     x5 : 0000000000000030 x4 : 00000000fffffffe x3 : 0000000000000000     x2 : ffffac9aba78c1c8 x1 : ffffac9aba76d0a8 x0 : 0000000000000008     Call trace:      hex_dump_to_buffer+0x30c/0x4a0 (P)      print_hex_dump+0xac/0x170      cper_estatus_print_section+0x90c/0x968      cper_estatus_print+0xf0/0x158      __ghes_print_estatus+0xa0/0x148      ghes_proc+0x1bc/0x220      ghes_notify_hed+0x5c/0xb8      notifier_call_chain+0x78/0x148      blocking_notifier_call_chain+0x4c/0x80      acpi_hed_notify+0x28/0x40      acpi_ev_notify_dispatch+0x50/0x80      acpi_os_execute_deferred+0x24/0x48      process_one_work+0x15c/0x3b0      worker_thread+0x2d0/0x400      kthread+0x148/0x228      ret_from_fork+0x10/0x20     Code: 6b14033f 540001ad a94707e2 f100029f (b8747b44)     ---[ end trace 0000000000000000 ]---  Prevent that by taking the actual allocated are into account when checking for CPER length.  [ rjw: Subject tweaks ]","modified":"2026-09-01T16:06:43.727204977Z","published":"2026-05-06T12:16:49.057Z","upstream":["CVE-2026-43277"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-43277"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.170-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43277.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.85-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43277.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.19.6-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-43277.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}